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| Fine mapping of Msv1, a major QTL for resistance to Maize Streak Virus leads to development of production markers for breeding pipelines, Nair, S. K., Babu, R., Magorokosho, C., Mahuku, G ., Semagn, K., Beyene, Y., Das, B., Makumbi, D.+, Kumar, P. L., Olsen, M. and Boddupalli, P. M., in: Theoretical and Applied Genetics, volume 128, pages 1839-1854, ISSN 0040-5752, 2015. [DOI] |
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| Fine mapping of RYMV3: a new resistance gene to Rice yellow mottle virus from Oryza glaberrima, Pidon, H., Ghesquiere, A., Cheron, S., Issaka, S., Hebrard, E., Sabot, F., Kolade, O., Silue, D. and Albar, L., in: Theoretical and Applied Genetics, volume 130, number 4, pages 807-818, ISSN 0040-5752, 2017. [DOI] |
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| First evidence for the spread of East African cassava mosaic virus - Uganda (EACMV-UG) and the pandemic of severe cassava mosaic disease to Burundi, Legg, J., Bigirimana, S.*, Barumbanze, P.* and Obonyo, R., in: Plant Pathology, volume 53, number 2, pages 231, ISSN Online: 1365-3059, 2004. |
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| First identification of begomoviruses infecting tomato with leaf curl disease in Burkina Faso, Sattar, M. N., Koutou, M.*, Hosseini, S., Leke, W., Brown, J. and Kvarnheden, A., in: Plant Disease, pages 1, ISSN 0191-2917, 2015. [DOI] |
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| First report of banana bunchy top virus in banana (Musa spp.) and its eradication in Togo, Kolombia, Y. A., Oviasuyi, T., Dzola, A., Gonh-Goh, A., Atsu, T., Oresanya, A., Ogunsanya, P., Alabi, T. R. and Kumar, P. L., in: Plant Disease, pages 1, ISSN 0191-2917, 2021. [DOI] |
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| First report of Banana bunchy top virus in banana and plantain (Musa spp.) in Angola, Kumar, P. L., Ayodele, M., Oben, T., Mahungu, N., Beed, F., Coyne, D., Londa, L.*, Mutunda, M. P.*, Kiala, D.* and Maruthi, M. N., in: Plant Pathology, volume 58, number 2, pages 402, ISSN 0032-0862, 2009. [DOI] |
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| First report of banana bunchy top virus in banana and plantain (musa spp.) in Nigeria, Adegbola, R. O., Ayodeji, O., Awosusi, O.*, Atiri, G.* and Kumar, P. L., in: Plant Disease, volume 97, number 2, pages 290-292, ISSN 0191-2917, 2013. [DOI] |
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| First report of banana bunchy top virus in banana and plantain (Musa spp.) in Tanzania, Mpoki, S.*, Mahuku, G., Mbanzibwa, D. R.*, Mkamilo, G.*, Mark, D.*, Mosha, H. I.*, Pallangyo, B.*, Fihavango, M.*, Oresanya, A., Ogunsanya, P. and Kumar, P. L., in: Plant Disease, pages 1-7, ISSN 0191-2917, 2021. [DOI] |
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| First report of banana streak virus disease in Malawi, Vuylsteke, D., Chizala, C. T. and Lockhart, B., in: Plant Disease, volume 80, number 2, pages 224, 1996. |
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| First report of cassava brown streak disease and associated Ugandan cassava brown streak virus in Burundi, Bigirimana, S.*, Barumbanze, P.*, Ndayihanzamaso, P.*, Shirima, R. R. and Legg, J., in: New Disease Reports, volume 24, pages 26, ISSN 2044-0588, 2011. [DOI] |
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| First report of cucumber mosaic virus in yams (Dioscorea spp.) in Ghana, Togo and Republic of Benin in West Africa, Eni, A., Kumar, P. L., Asiedu, R., Alabi, O., Naidu, R.*, Hughes, J. and Rey, M.*, in: Plant Disease, volume 92, number 5, pages 833, ISSN 0191-2917, 2008. [DOI] |
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| First report of East African cassava mosaic begomovirus in Nigeria, Ogbe, F., Atiri, G.*, Robinson, D., Winter, S., Dixon, A., Quin, F. and Thottappilly, G., in: Plant Disease, volume 83, number 4, pages 398, ISSN 0191-2917, 1999. |
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| First Report of East African cassava mosaic Malawi virus in Plants Affected by Cassava Mosaic Disease in Zambia, Mulenga, R.*, Miano, D.*, Chikoti, P.*, Ndunguru, J.*, Legg, J. and Alabi, O., in: Plant Disease, volume 99, number 9, pages 1290, ISSN 0191-2917, 2015. [DOI] |
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| First report of Ethiopian tobacco bushy top virus and its associated satellite RNA infecting common bean (Phaseolus vulgaris L.) in Zambia, Mulenga, R.*, Miano, D.*, Kaimoyo, E. *, Akello, J., Nzuve, F. M.*, Simulundu, E. * and Alabi, O. J., in: Plant Disease, pages 1-2, ISSN 0191-2917, 2020. [DOI] |
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| First Report of Maize chlorotic mottle virus Infecting Maize in the Democratic Republic of the Congo, Lukanda, M.*, Owati, A., Ogunsanya, P., Valimunzigha, K.*, Katsongo, K.*, Ndemere, H.* and Kumar, P. L., in: Plant Disease, volume 98, number 10, pages 1448, ISSN 0191-2917, 2014. [DOI] |
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| First report of maize yellow mosaic virus infecting sugarcane (Saccharum spp.) and itch grass (Rottboellia cochinchinensis) in Nigeria, Yahaya, A.*, Al Rwahnih, M., Dangora, D. B.*, Gregg, L., Alegbejo, M.*, Kumar, P. L. and Alabi, O. J., in: Plant Disease, volume 101, number 7, pages 1335, ISSN 0191-2917, 2017. [DOI] |
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| First report of mixed infection of cassava brown streak virus and Ugandan cassava brown streak virus on cassava in north-eastern Democratic Republic of Congo, Casinga, C. M., Monde, G.*, Shirima, R. R. and Legg, J., in: Plant Disease, volume 103, number 1, pages 166, ISSN 0191-2917, 2019. [DOI] |
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| First report of passion fruit woodiness virus associated with passion fruit woodiness disease of passion fruit in Nigeria, Arogundade, O.*, Oyekanmi, J., Oresanya, A., Ogunsanya, P., Akinyemi, S. O. S.* and Kumar, P. L., in: Plant Disease, pages 1-5, ISSN 0191-2917, 2018. [DOI] |
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| First report of southern bean mosaic virus infecting common bean in Zambia, Mulenga, R.*, Miano, D.*, Kaimoyo, E. *, Akello, J., Nzuve, F. M.*, Al Rwahnih, M., Chikoti, P.*, Chiona, M.*, Simulundu, E. * and Alabi, O. J., in: Plant Disease, volume 104, number 6, pages 1-3, ISSN 0191-2917, 2020. [DOI] |
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| First report of soybean chlorotic blotch virus and west African Asystasia virus 1 infecting cassava and a wild cassava relative in Cameroon and Togo, Leke, W. N.*, Mignouna, D., Brown, J. and Fondong, V. N., in: New Disease Reports, volume 33, pages 24, ISSN 2044-0588, 2016. [DOI] |
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| First report of the East African cassava mosaic virus-Uganda (EACMV-UG) infecting cassava (Manihot esculenta) in Cameroon, Akinbade, S., Hanna, R., Nguenkam, A., Njukwe, E., Fotso, A., Doumtsop, A. R. P., Ngeve, J., Tenku, S. T. N.* and Kumar, P. L., Abstract in New Disease Reports, 2010. [DOI] |
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| First report of the occurrence of African cassava mosaic virus in a mosaic disease of soybean in Nigeria, Mgbechi-Ezeri, J., Alabi, O., Naidu, R.* and Kumar, P. L., in: Plant Disease, volume 92, pages 1, ISSN 0191-2917, 2008. |
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| First report of the occurrence of East African cassava mosaic virus-Uganda (EACMV-UG) in Angola, Kumar, P. L., Akinbade, S., Dixon, A., Mahungu, N., Mutunda, M. P.*, Kiala, D.*, Londa, L.* and Legg, J., in: New Disease Reports, volume 18, ISSN d000-1007, 2008. |
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| First report of the occurrence of East African cassava mosaic virus-Uganda (EACMV-UG) in Angola, Kumar, P. L., Akinbade, S., Dixon, A., Mahungu, N., Mutunda, M. P.*, Kiala, D.*, Londa, L.* and Legg, J., in: Plant Pathology, volume 58, number 2, pages 402, ISSN 0032-0862, 2009. [DOI] |
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| First report of the severe Uganda variant of East African cassava mosaic virus in Zambia, Tembo, M.*, Crespo-Bellido, A., Chikoti, P.*, Adediji, A. O.*, Mataa, M.*, Ntawuruhunga, P., Shirima, R. R., Legg, J. and Duffy, S., in: New Disease Reports, volume 49, number 1: e12260, pages 1-3, ISSN 2044-0588, 2024. [DOI] |
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| First report of Ugandan cassava brown streak virus on cassava in Democratic Republic of Congo, Mulimbi, W.*, Phemba, X.*, Assumani, B.*, Kasereka, P.*, Muyisa, S.*, Ugentho, H.*, Reeder, R., Legg, J., Laurenson, L., Weekes, R. and Thom, F. E, in: New Disease Reports, volume 26, pages 11, ISSN 2044-0588, 2012. [DOI] |
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| Genetic diversity of virome and mycobiome of cassava in Bagamoyo, Tanzania and basis for treat discrepancy between cassava brown streak virus species, Mero, H. R.*, University of Dar es Salaam, 2022. |
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| Genome sequence of a Spodoptera frugiperda multiple Nucleopolyhedrovirus isolated from fall armyworm (Spodoptera frugiperda) in Nigeria, west Africa, Wennmann, J., Tepa-Yotto, G., Jehle, J. A. and Goergen, G ., in: Microbiology Resource Announcements, volume 10, number 34: e00565-21, pages 1-3, ISSN 2576-098X, 2021. [DOI] |
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| Genome-wide mapping uncovers significant quantitative trait loci associated with yam mosaic virus infection, yield and dry matter content in White Guinea yam (Dioscorea rotundata Poir.), Adjei, E. A.*, Odong, T. L.*, Esuma, W.*, Bhattacharjee, R., Agre, A. P., Adebola, P. O., Chamba, E.*, Asfaw, A., Dramadri, I.*, Mbabazi, S. T.*, Edema, R.*, Ozimati, A.*, Ochwo-Ssemakula, M.* and Alicai, T.*, in: Frontiers in Horticulture, volume 3, number -: 1365567, pages 1-13, ISSN 2813-3595, 2024. [DOI] |
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| Genomic and proteomic analysis of Schizaphis graminum reveals cyclophilin proteins are involved in the transmission of cereal yellow dwarf virus, Tamborindeguy, C., Bereman, M., DeBlasio, S., Igwe, D., Smith, M., White, F., MacCoss, M., Gray, S. M. and Cilia, M., in: PLOS ONE, volume 8, number 8, pages 1-10, ISSN 1932-6203, 2013. |
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| High resolution DNA melting assays for detection of Rx1 and Rx2 for high-throughput marker assisted selection for extreme resistance to Potato virus X in tetraploid potato, Nie, X., Dickison, V., Brooks, S., Nie, B., Singh, M., De Koeyer, D. and Murphy, A., in: Plant Disease, pages 1-36, ISSN 0191-2917, 2017. [DOI] |
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| High-throughput multiplex real-time PCR assay for the simultaneous quantification of DNA and RNA viruses infecting cassava plants, Otti, G., Bouvaine, S., Kimata, B.*, Mkamilo, G.*, Kumar, P. L., Tomlins, K. and Maruthi, M. N., in: Journal of Applied Microbiology, volume 120, number 5, pages 1346-1356, ISSN 1364-5072, 2016. [DOI] |
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| Homing in on endogenous badnaviral elements: Development of multiplex PCR-DGGE for detection and rapid identification of badnavirus sequences in yam germplasm, Silva, G., Bömer, M., Turaki, A. A.*, Nkere, C., Kumar, P. L. and Seal, S., in: Frontiers in Plant Science, volume 13, number -: 846989, pages 1-16, ISSN 1664-462X, 2022. [DOI] |
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| Hybrids of RNA viruses and viroid-like elements replicate in fungi, Forgia, M., Navarro, B., Daghino, S., Cervera, A., Gisel, A., Perotto, S., Aghayeva, D. N., Akinyuwa, M. F., Gobbi, E., Zheludev, I. N., Edgar, R. C., Chikhi, R., Turina, M., Babaian, A., Di Serio, F. and de la Pena, M., in: Nature Communications, volume 14, number -: 2591, pages 1-11, ISSN 2041-1723, 2023. [DOI] |
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| ICTV virus taxonomy profile: Caulimoviridae, Teycheney, P., Geering, A. D., Dasgupta, I.*, Hull, R., Kreuze, J., Lockhart, B., Muller, E., Olszewski, N., Pappu, H. R., Pooggin, M., Richert-Poggeler, K. R., Schoelz, J. E., Seal, S., Stavolone, L., Umber, M. and ICTV Report Consortium, , in: Journal of General Virology, volume 101, number 10, pages 1025-1026, ISSN 0022-1317, 2020. [DOI] |
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| Identification of a defective molecule derived from DNA-A of the bipartite begomovirus of East African Cassava Mosaic Virus, Ndunguru, J.*, Legg, J., Fofana, B., Aveling, T.*, Thompson, G.* and Fauquet, C., in: Plant Pathology, volume 55, pages 2-10, 2006. |
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| Identification of a virus naturally infecting sorghum in India as Sugarcane streak mosaic virus, Srinivas, K. P.*, Subba Reddy, Ch. V.*, Ramesh, B.*, Kumar, P. L. and Sreenivasulu, P.*, in: European Journal of Plant Pathology, ISSN 0929-1873, 2010. [DOI] |
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| Interactions between cassava mosaic geminiviruses and their vector, Bemisia tabaci (Hemiptera: aleyrodidae), Boni, S., Rugumamu, C. P.*, Gerling, D., Nokoe, K.* and Legg, J., in: Journal of Economic Entomology, volume 110, number 3, pages 884-892, ISSN 0022-0493, 2017. [DOI] |
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| Intraplant variation in sympton expression and distribution of banana streak badnavirus in naturally-infected plantain and banana ( Musa spp.), Dahal, G., Pasberg-Gauhl, C., Gauhl, F., Thottappilly, G. and Hughes, J., in: Phytopathology, volume 87, number S-22, 1997. |
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| Investigation of systemic movement patterns of Cassava Brown Streak ipomoviruses in selected cassava varieties, Ceasar, G.*, University of Dar es Salaam, 2019. |
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| Ipomoviruses, Webb, S. E., Adkins, S., Maruthi, M. N. and Legg, J., pages 435-440, chapter 31, The American Phytopathological Society (APS), ISBN 978-0-89054-535-5, 2016. [DOI] |
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| Isolation and characterization of Baculoviruses from three major Lepidopteran pests in the Semi-Arid tropics of India, Kumar, C. S., Ranga Rao, G. V., Sireesha, K.* and Kumar, P. L., in: Indian Journal of Virology, volume 22, number 1, pages 29-36, ISSN 0970-2822, 2011. [DOI] |
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| Isolation, characterisation and identification of a potyvirus from Dioscorea alata L. (water yam) in Nigeria, Odu, B. O.*, Hughes, J., Shoyinka, S.* and Dongo, L., in: Annals of Applied Biology, volume 134, number 1, pages 65-71, ISSN 003-4746, 1999. |
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| Laboratory disinfects as preservatives for Helicoverpa armigera nucleopolyhedrovirus, Sireesha, K.*, Sridhar-Kumar, C.*, Ranga Rao, G. V., Arjona Rao, P. and Kumar, P. L., in: Indian Journal of Plant Protection, volume 36, number 2, pages 257-259, ISSN 0253-4355, 2008. |
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| Laboratory manual for the diagnosis of cassava virus diseases, Kumar, P. L. and Legg, J., 2009. |
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| Les cicadelles et le virus de la striure du mais (MSV): Guide de recherche de l'Iita, No. 38, Mesfin, T. and Bosque-Perez, N. A., Guide de recherche de l'Iita, No. 38, International Institute of Tropical Agriculture (IITA), 1993. |
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| Les facteurs determinant l'abondance du vecteur mouche blanche (Bemisia tabaci, Homoptera : Aleyrodidae) et les types des virus distribues sur le manioc en R.D. Congo, Bakelana, T.*, Legg, J., Munseki, L.*, Hauser, S. and Mahungu, N., in: Tropical Roots and Tuber Crops and the Challenges of Globalization and Climate Changes. Proceedings of the 11th triennial Symposium of the ISTRC-AB, 4 to 8 October 2010, pages 386-398, ISTRC-AB, Ibadan, Nigeria, 2012. |
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| Les facteurs determinant l'abondance du vecteur mouche blanche (Bemisia tabaci, Homoptera: Aleyrodidae) et les types des virus distribues sur le manioc en R.D. Congo, Bakelana, T.*, Legg, J., Lema, K., Hauser, S. and Mahungu, N., Abstract in Book of Abstracts of the 11th Triennial Symposium of ISTRC-AB, held at Memling Hotel, Kinshasa. 4-8 October, 2010. |
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| Les virus et les maladies virales du mais en Afrique tropicale: Guide de recherche de l'Iita, No. 54, Thottappilly, G., Rossel, H. W. and Bosque-Perez, N. A., Guide de recherche de l'Iita, No. 54, International Institute of Tropical Agriculture (IITA), ISBN 978-131-137-1, 1998. |
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| Limits of phytosanitation and host plant resistance towards the control of cassava viruses in Uganda, Kawuki, R. S.*, Adiga, G.*, Orone, J.*, Alicai, T.*, Edimu, M.*, Omara, T.*, Pariyo, A.*, Ezuma, W.*, Omongo, C. A.*, Bua, A.*, Kanju, E. and Baguma, Y.*, in: African Journal of Rural Development, volume 2, number 3, pages 455-466, ISSN 2415-2838, 2017. |
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| Maize chlorotic stunt in Africa: a manifestation of maize mottle virus?, Rossel, H. W. and Thottappilly, G., in: Proceedings, International Maize Virus Disease Colloquium and Workshop, edited by D.T. Gordon, J.K. Knoke, L.R. Nault and R.M. Ritter, pages 158-160, Wooster: Ohio Agricultural Research Center, 1983. |
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| Maize Chlorotic Stunt in Africa: a manifestation of maize mottle Virus?, Rossel, H. W. and Thottappilly, G., in: Paper presented at 2nd International Maize Virus Disease Colloquium and Workshop, 2-6 August 1982, 1982. |
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| Maize stripe virus: a disease of sorghum emerging in south India, Navi, S., Bandyopadhyay, R., Blummel, M.*, Reddy, R. and Thomas, D., in: International Sorghum and Millets Newsletter, volume 44, pages 126-129, 2003. |
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| Management of whitefly-transmitted viruses in open-field production systems, Lapidot, M., Legg, J., Wintermantel, W. M. and Polston, J. E., in: Advances in Virus Research, volume 90, pages 147-206, ISSN 0065-3527, 2014. [DOI] |
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| Managing the risk of introducing seed-transmitted viruses associated with import of cowpea germplasm into India, Chalam, V. C.*, Parakh, D. B., Khetarpal, R. K., Maurya, A. K. and Kapoor, P., Oral Presentation : 5th World Cowpea conference, 27 September to1 October 2010, Saly, Senegal., 2010. |
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| Managing the spread of cassava viruses through clean 'seed' systems (ABSTRACT), Hermence, C., Mtunda, K.*, Muhanna, M.*, Boniface, S., Jeremiah, S.*, Kanju, E. and Legg, J., Abstract, in the Book of Abstracts of the 12th International Plant Virus Epidemiology Symposium, 28 January to 1 February 2013, the Ngurdoto Mountain Lodge, Arusha, Tanzania, 2013. |
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| Mapping of QTLs associated with recovery resistance to streak virus disease in maize, Ladejobi, F., Salaudeen, M. T.*, Kumar, P. L., Menkir, A., Adesoye, A. I.*, Atiri, G.* and Gedil, M., in: Annals of Agricultural Sciences, pages 1-7, ISSN 0570-1783, 2018. [DOI] |
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| Mapping the regional epidemiology of cassava viruses in east and central Africa, Legg, J., Bouwmeester, H., Shirima, R. R., Jeremiah, S.*, Ndyetabula, I.*, Obiero, H.*, Mkamilo, G.*, Bigirimana, S.*, Gashaka, G.*, Tata-Hangy, K.*, Okao-Okuja, G.*, Alicai, T.* and Kumar, P. L., Abstract, P. 127 in the Book of Abstracts of the 12th International Plant Virus Epidemiology Symposium, 28 January to 1 February 2013, the Ngurdoto Mountain Lodge, Arusha, Tanzania, 2013. |
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| Methods for the detection of plant viruse diseases, Naidu, R.* and Hughes, J., in: Plant virology in sub-Saharan Africa: proceedings of a conference organized by IITA, 4-8 June 2001. Ibadan, Nigeria, pages 233-260, International Institute of Tropical Agriculture (IITA), 2003. |
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| Methods for the detection of plant viruses, Naidu, R.* and Hughes, J., in: Book of Abstracts of the First conference on Plant virology in sub-Saharan Africa, 4-8 June, International Institute of Tropical Agriculture (IITA), Ibadan, Nigeria, 2001. |
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| Mixed infection by two West African tomato-infecting begomoviruses and ageratum leaf curl Cameroon betasatellite in tomato in Cameroon, Leke, W. and Kvarnheden, A., in: Archives of Virology, pages 1-4, ISSN 0304-8608, 2014. [DOI] |
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| Mixed infections by biological variants of African Cassava Mosaic Virus and their associated severe symptoms on cassava in Nigeria, Ogbe, F., Dixon, A., Hughes, J. and Alabi, F., in: Proceedings of 9th ISTRC-AB symposium, pages 639-643, Mombasa, Kenya, 2007. |
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| Mixed infections by biological variants of African cassava mosaic virus and their associated severe symptoms on cassava in Nigeria, Ogbe, F., Dixon, A., Hughes, J. and Alabi, F., in: Book of Abstracts of the 9th Triennial Symposium of the International Society for Tropical Root Crops-Africa Branch, 31 October-5 November 2004, Mombasa, Kenya, 2004. |
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| Molecular biodiversity of cassava begomoviruses in Tanzania: evolution of cassava geminiviruses in Africa and evidence for East Africa being a center of diversity of cassava geminiviruses, Ndunguru, J.*, Legg, J., Aveling, T.*, Thompson, G.* and Fauquet, C., in: Virology Journal, volume 2, ISSN 1743-422X, 2005. [DOI] |
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| Molecular characterization of a new virus species identified in yam (Dioscorea spp.) by high-throughput sequencing, Silva, G., Bomer, M., Rathnayake, A. I., Sewe, S. O., Visendi, P., Oyekanmi, J., Quain, M. D.*, Akomeah, B.*, Kumar, P. L. and Seal, S., in: Plants, volume 8, number 6: 167, pages 1-10, ISSN 2223-7747, 2019. [DOI] |
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| Molecular characterization of two novel soybean-infecting begomoviruses from Nigeria, Alabi, O., Kumar, P. L., Mgbechi-Ezeri, J. and Naidu, R., 2009. |
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| Molecular diversity of tomato begomoviruses in Dar es Salaam, Tanzania (ABSTRACT), Shirima, R. R., Legg, J., Mtei, M., Maganga, M., Beed, F., Luambano, N.* and Coyne, D., Abstract, annual meeting of Association of Corporate Counsel (ACC'S) 27- 30 October, Los Angeles Convention Center Los Angeles, CA, 2013. |
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| Molecular variability and distribution of cassava mosaic begomoviruses in Nigeria, Ariyo, O., Koerbler, M., Dixon, A., Atiri, G.* and Winter, S., in: Journal of Phytopathology, volume 153, number 4, pages 226-231, 2005. |
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| Monitoring Aedes populations for arboviruses, Wolbachia, insecticide resistance and its mechanisms in various agroecosystems in Benin, Ateutchia-Ngouanet, S., Nanfack-Minkeu, F., Mavridis, K., Wanji, S.*, Demanou, M., Vontas, J. and Djouaka, R. F., in: Acta Tropica, volume 253, number -: 107178, pages 1-10, ISSN 0001-706X, 2024. [DOI] |
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| Monitoring and diagnostic survey of cassava mosaic virus disease (CMD) in Burundi, Bigirimana, S.*, Bizimana, S.*, Barumbanze, P.*, Busungu, C. and Legg, J., 2007. |
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| Monitoring and diagnostic survey of cassava mosaic virus disease (CMD) in Eastern Democratic Republic of Congo (Part 1), Tata-Hangy, K.*, Koffi-Tete, M., Obonyo, R., Okao-Okuja, G., Asiimwe, P. and Legg, J., 2007. |
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| Monitoring and diagnostic survey of cassava mosaic virus disease (CMD) in Eastern Democratic Republic of Congo (Part 2), Tata-Hangy, K.*, Koffi-Tete, M., Obonyo, R., Okao-Okuja, G., Asiimwe, P. and Legg, J., 2007. |
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| Monitoring and diagnostic survey of cassava mosaic virus disease (CMD) in Rwanda, Kanyange, M. C.*, Night, G., Nyirahorana, C., Mukakanyana, C., Gashaka, G.*, Okao-Okuja, G., Obonyo, R., Asiimwe, P. and Legg, J., 2007. |
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| Monitoring and diagnostic survey of cassava mosaic virus disease (CMD) in the lake zone of Tanzania, Jeremiah, S.*, Ndyetabula, I.*, Boni, S. B.*, Shirima, R. R. and Legg, J., 2007. |
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| Monitoring and diagnostic survey of cassava mosaic virus disease (CMD) in Uganda, Omongo, C. S.*, Poro, S., Omara, J., Omara, T.*, Okao-Okuja, G., Obonyo, R., Asiimwe, P. and Legg, J., 2007. |
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| Monitoring and diagnostic survey of cassava mosaic virus disease (CMD) in Western Kenya, Obiero, H., Akhwale, M., Okao-Okuja, G., Asiimwe, P. and Legg, J., 2007. |
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| Multiple virus infections of lablab [ Lablab purpureus (L.) Sweet] in Nigeria, Odedara, O.*, Hughes, J., Odebode, C. A.* and Odu, B. O.*, in: Journal of General Plant Pathology, volume 74, pages 322-325, ISSN 1345-2630, 2008. |
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| Multiplex PCR for the detection of African cassava mosaic virus and East African cassava mosaic Cameroon virus in cassava, Alabi, O., Kumar, P. L. and Naidu, R., in: Journal of Virological Methods, volume 154, number 1-2, pages 111-120, ISSN 0166-0934, 2008. [DOI] |
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| Multiplex RT-PCR assays for the simultaneous detection of both RNA and DNA viruses infecting cassava and the common occurrence of mixed infections by two cassava brown streak viruses in East Africa, Abarshi, M. M., Mohammed, I. B., Jeremiah, S. C., Legg, J., Kumar, P. L., Hillocks, R. J. and Maruthi, M. N., in: Journal of Virological Methods, volume 179, number 1, pages 176-184, ISSN 0166-0934, 2012. [DOI] |
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| Multiplex RT-PCR assays for the simultaneous detection of cassava mosaic virus and cassava brown streak viruses, Abarshi, M. M., Mohammed, I. B., Legg, J., Kumar, P. L., Hillocks, R. J. and Maruthi, M. N., Abstract, SP05-11 (SP05-06) in Program and Abstracts, Second Scientific Conference of the Global Cassava Partnership for the 21st Century (GCP21-II). June 18-22, 2012, Kampala, Uganda, 2012. |
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| Multiplex RT-PCR assays for the simultaneous detection of cassava mosaic virus and cassava brown streak viruses, Maruthi, M. N., Musa, A., Legg, J., Kumar, P. L. and Hillocks, R. J., Abstract, P. 202 in the Book of Abstracts of the 12th International Plant Virus Epidemiology Symposium, 28 January to 1 February 2013, the Ngurdoto Mountain Lodge, Arusha, Tanzania, 2013. |
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| Murine monoclonal antibodies for detection and differentiation of feathery mottle virus isolates in sweet potato, Hammond, J., Thottappilly, G., Lawson, R. H. and Hsu, H. T., 1988. |
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| Musa germplasm A and B genomic composition differentially affects their susceptibility to banana bunchy top virus and its aphid vector, Pentalonia nigronervosa, Ngatat, S., Hanna, R., Lienou, J., Ghogomu, R.*, Nguidang, S. P. K., Enoh, A. C., Ndemba, B.*, Korie, S., Fotso Kuate, A., Nanga, S. N., Fiaboe, K. and Kumar, P. L., in: Plants, volume 11, number 9: 1206, pages 1-18, ISSN 2223-7747, 2022. [DOI] |
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| NE-11 represents a new strain variant class of potato virus Y, Lorenzen, J., Nolte, P., Martin, D., Pasche, J. S. and Gudmestad, N. C., in: Archives of Virology, volume 153, number 3, pages 517-525, ISSN 0304-8608, 2008. [DOI] |
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| Nematodes as potential vectors of banana die-back, a virus disease of Musa spp., Auwerkerken, A., Hughes, J., Coyne, D., De Waele, D. and Brown, D., in: Proceedings, Lagos, Nigeria, 2002. |
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| New reports of the occurrence of the Uganda variant of East African Cassava Mosaic Virus (EACMV-Ug) from western Democratic Republic of Congo and the Congo Republic define the westernmost extent of the CMD pandemic in East/Central Africa, Neuenschwander, P., Hughes, J., Ogbe, F., Ngatse, J. and Legg, J., in: New Disease Reports, volume 4, 2001. |
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| New spread of Cassava Brown streak virus disease and its implications for the movement of cassava germplasm in the east and central African region, Ntawuruhunga, P. and Legg, J., 2007. |
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| New spread of cassava brown streak virus disease and its implications for the movement of cassava germplasm in the East and Central African region, Ntawuruhunga, P. and Legg, J., 2007. |
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| New technologies provide innovative opportunities to enhance understanding of major virus diseases threatening global food security, Kreuze, J., Cuellar, W., Kumar, P. L., Boddupalli, P. M. and Omondi, A. B., in: Phytopathology, volume 113, number 9, pages 1622-1629, ISSN 0031-949X, 2023. [DOI] |
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| Non-systemic infection of Tobacco streak virus on cotton in Warangal district, Andhra Pradesh, Prasada Rao, R. D. V. J.*, Jyotsna, M. K.*, Reddy, A., Varaprasad, K. S.*, Nigam, S. and Kumar, P. L., in: Indian Journal of Plant Protection, volume 37, number 1-2, pages 196-198, ISSN 0253-4355, 2010. |
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| Occurence of cowpea mottle virus and other viruses (cowpea yellow mosaic virus, southern bean mosaic virus) in cowpea, Thottappilly, G. and Rossel, H. W., in: FAO Plant Protection Bulletin, volume 36, number 4, pages 184-185, 1989. |
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| Occurence of rice yellow mottle virus in some Sahelian countries in West Africa, John, V. T., Thottappilly, G. and Awoderu, V. A., in: FAO Plant Protection Bulletin, volume 32, pages 86-87, 1984. |
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| Occurence of Southern bean mosaic virus (SBMV) in Togo and its interaction with some cowpea cultivars, Gumedzoe, Y. M.*, Thottappilly, G. and Asselin, A., in: African Crop Science Journal, volume 4, number 2, pages 215-221, ISSN 1021-9730, 1996. |
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| Occurence of southern bean mosaic virus in cowpea in Senegal, Gaikwad, D. G. and Thottappilly, G., in: Journal of Phytopathology, volume 121, pages 366-369, 1988. |
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| Occurrence and distribution of viruses infecting fluted pumpkin (Telfairia occidentalis, Hook F.) in Imo State, Nigeria, Oben, T., Atiri, G.*, Fagbola, O.*, Akinbade, S., Oyibo, P. and Kumar, P. L., pages 122, 2007. |
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| Occurrence and incidence of viruses infecting fluted pumpkin (Telfairia occidentalis Hook F.) in Benue State, Nigeria, Time, I., Oben, T., Atiri, G.* and Kumar, P. L., Abstract in Book of abstracts of the 29th annual national conference of the Horticultural Society of Nigeria (HORTSON), 24-29, July, Makurdi, Nigeria, 2011. |
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| Occurrence of banana bunchy top disease caused by the banana bunchy top virus on banana and plantain (Musa sp.) in Cameroon, Oben, T., Hanna, R., Ngeve, J., Alabi, O., Naidu, R. and Kumar, P. L., in: Plant Disease, volume 93, number 10, pages 1076, ISSN 0191-2917, 2009. [DOI] |
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| Occurrence of Banana bunchy top virus in banana and plantain (Musa sp.) in Benin, Lokossou, B.*, Gnanvossou, D., Ayodeji, O., Akplogan, F.*, Safiore, A.*, Migan, D.*, Pefoura, A.*, Hanna, R. and Kumar, P. L., in: New Disease Reports, volume 25, pages 13, ISSN 2044-0588, 2012. [DOI] |
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| Occurrence of cassava brown streak disease and associated Ugandan cassava brown streak virus in Rwanda in 2012 (ABSTRACT), Gashaka, G.*, Shirima, R. R., Kanyange, M. C.*, Mutumwinka, M.*, Mukakanyana, C.*, Nyirahorana, C.*, Uwimana, J.*, Ntivuguruzwa, S.*, Sifa, A.*, Kazindu, J.*, Ndahimana, J.*, Umfuyisoni, J.* and Legg, J., Abstract in Rwanda Agricultural Board Conference on Agriculture and Extension, August 21-23, Kigali, Rwanda, 2013. |
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| Occurrence of cowpea viruses in the forest and savannah agro-ecological zones of Ghana, Adams, F. K.*, Kumar, P. L., Kwoseh, C.* and Akromah, R.*, in: African Crop Science Journal, volume 28, number 3, pages 441-448, ISSN 1021-9730, 2020. [DOI] |
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| Occurrence of latent virus infection in visually-rated cowpea (Vigna unguiculata L. Walp) seedlings, Odedara, O.*, Hughes, J.+ and Odu, B., in: Archives of Phytopathology and Plant Protection, volume 42, number 9, pages 882-890, ISSN 1477-2906, 2009. [DOI] |
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| Occurrence of Telfairia mosaic virus (TEMV) in fluted pumpkin in Nigeria, Shoyinka, S.* and Thottappilly, G., in: African Crop Science Journal, volume 6, number 1, pages 69-78, ISSN 1021-9730, 1998. |
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| Occurrence of the Uganda variant of East African cassava mosaic virus (EACMV-Ug) in western Democratic Republic of Congo and the Congo Republic defines the westernmost extent of the CMD pandemic in East/Central Africa, Neuenschwander, P., Hughes, J., Ogbe, F., Ngatse, J. and Legg, J., in: Plant Pathology, volume 51, pages 385, ISSN 0032-0862, 2002. |
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| Occurrence, incidence and distribution of viruses infecting yam (Dioscorea spp.) in Nigeria, Asala, S.*, Alegbejo, M.*, Kashina, B. D.*, Banwo, O. O.*, Asiedu, R. and Kumar, P. L., Abstract, 2010. |
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| Occurrence, incidence and distribution of viruses infecting yam in Nigeria, Asala, S., Alegbejo, M.*, Kashina, B. D.*, Banwo, O. O.* and Kumar, P. L., Abstract in Book of abstracts of the 36th annual conference of the Nigerian Society of Plant Protection (NSPP), 4 - 8 September, Futa, Nigeria., 2011. |
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| On the ecology of maize streak virus and of maize mottle chlorotic stint, a disease transmitted by the Maize Streak Virus Vector, Cicadulina triangula, Rossel, H. W., in: Paper presented at a Meeting on Plant Virus Disease Epidemiology at Oxford, 28-30 July 1981, 1981. |
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| Optimised DNA capture protocols in the field, extraction and PCR diagnostics for Banana Xanthomonas Wilt and Banana Bunchytop virus using simple DNA capture kits, Ramathani, I., Valentine, N. and Beed, F., Abstract, p. 173 in Book of Abstracts of CIALCA International Conference on "Challenges and Opportunities for Agricultural Intensification of the Humid-Highland Systems of sub-Saharan Africa", Kigali, Rwanda, 24-27 October, 2011. |
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| Optimization of diagnostic RT-PCR protocols and sampling procedures for the reliable and cost-effective detection of Cassava brown streak virus, Abarshi, M. M., Mohammed, I. B., Wasswa, P., Hillocks, R. J., Holt, J., Legg, J., Seal, S. and Maruthi, M. N., in: Journal of Virological Methods, volume 163, pages 353-359, ISSN 0166-0934, 2010. |
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| Ortervirales: new virus order unifying five families of reverse-transcribing viruses, Krupovic, M., Blomberg, J., Coffin, J. M., Dasgupta, I.*, Fan, H., Geering, A. D., Gifford, R., Harrach, B., Hull, R., Johnson, W., Kreuze, J., Lindemann, D., Llorens, C., Lockhart, B., Mayer, J., Muller, E., Olszewski, N., Pappu, H. R., Pooggin, M., Richert-Poggeler, K. R., Sabanadzovic, S., Sanfacon, H., Schoelz, J. E., Seal, S., Stavolone, L., Stoye, J. P., Teycheney, P., Tristem, M., Koonin, E. V. and Kuhn, J. H., in: Journal of Virology, volume 92, number 12, pages 1-7, ISSN 0022-538X, 2018. [DOI] |
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| Overview of viruses of legumes other than groundnut in Africa, Hughes, J. and Shoyinka, S.*, in: Plant Virology in sub-Saharan Africa: proceedings of a conference organized by IITA, 4-8 June 2001., pages 553-568, International Institute of Tropical Agriculture, IITA, 2003. |
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| Pandemics of cassava virus diseases in Africa: developing appropriate management strategies, Legg, J., Shirima, R. R., Jeremiah, S.*, Boniface, S., Okao-Okuja, G., Maruthi, M. N., Kumar, P. L., Smith, J. and Peters, D.*, Abstract, SP05-11 (PS14) in Program and Abstracts, Second Scientific Conference of the Global Cassava Partnership for the 21st Century (GCP21-II). June 18-22, Kampala, Uganda., 2012. |
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| Partial characterization and molecular cloning of a closterovirus from sweet Potato virus diseases complex from Nigeria, Winter, S., Purac, A., Leggett, F., Frison, E., Rossel, H. W. and Hamilton, R. I., in: Phytopathology, volume 82, number 8, pages 869-875, ISSN 0031-949X, 1992. |
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| Pathogen-derived resistance using a viral nucleocapsid gene confers only partial non-durable protection in peanut against peanut bud necrosis virus, Rao, S. C.*, Bhatnagar-Mathur, P., Kumar, P. L., Reddy, S. and Sharma, K., in: Archives of Virology, volume 158, number 1, pages 133-143, ISSN 0304-8608, 2013. [DOI] |
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| PCR-DGGE analysis: unravelling complex mixtures of badnavirus sequences present in yam germplasm, Turaki, A., Bomer, M., Silva, G., Kumar, P. L. and Seal, S., in: Viruses, volume 9, number 7, pages 1-24, ISSN 1999-4915, 2017. [DOI] |
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| Performance in three agroecologies of virus-tested cassava genotypes derived from meristem culture, Akano, A. O., Ng, S. Y. C., Asiedu, R. and Atiri, G.*, in: Root crops and poverty alleviation: proceedings of the Sixth Triennial Symposium of the International Society for Tropical Root Crops�Africa Branch, 22�28 October 1995, Lilongwe, Malawi, 1998. |
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| Phytosanitary measures in the management of virus diseases in cassava germplasm at Kephis, Onamu, R., Njoroge, P., Kimani, E., Kedera, C. and Ntawuruhunga, P., in: Conference Proceedings, 5-9, December, Kampala, Uganda, 2005. |
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| Phytosanitary measures in the management of virus diseases in cassava germplasm at KEPHIS, Njoroge, P., Kimani, E., Kedera, C. J. and Ntawuruhunga, P., in: Conference proceedings, Kampala, 5-9 December 2005, 2006. |
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| Phytosanitary situation of maize streak virus in the main maize production zones of Cameroon, Mbong, G. A.*, Suh, C.*, Sime, H. D.*, Anoumaa, M.*, Fonkou, T.*, Nkombo, L. L. C.*, Meseka, S. K., Kumar, P. L. and Menkir, A., in: Agricultural Sciences, volume 12, pages 339-353, ISSN 2156-8553, 2021. [DOI] |
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| Pigeonpea sterility mosaic emaraviruses: a journey from a mysterious virus to classic emaraviruses, Patil, B. L.* and Kumar, P. L., pages 255-270, chapter 10, Springer Singapore, ISBN 978-981-10-5672-7, 2017. [DOI] |
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| Pigeonpea sterility mosaic virus: a legume-infecting Emaravirus from South Asia, Patil, B. L.* and Kumar, P. L., in: Molecular Plant Pathology, volume 16, number 8, pages 775-786, ISSN 1464-6722, 2015. [DOI] |
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| Plant resistance to geminiviruses, Patil, B. L.*, Chakraborty, S.*, Czosnek, H., Fiallo-Olive, E., Gilbertson, R., Legg, J., Mansoor, S., Navas-Castillo, J., Naqvi, R. Z.*, Rahman, S. U.* and Zerbini, F. M.*, pages 1-13, Elsevier, 2020. [DOI] |
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| Plant virus ecology: regional overview, Kumar, P. L., 2009. |
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|
| Keywords: | Colletotrichum gloeosporioides; genotype x environment (G x E) interaction; stable resistance; water yam; yam anthracnose; yam mosaic virus
|
|
| First Report of Maize chlorotic mottle virus Infecting Maize in the Democratic Republic of the Congo, Lukanda, M.*, Owati, A., Ogunsanya, P., Valimunzigha, K.*, Katsongo, K.*, Ndemere, H.* and Kumar, P. L., in: Plant Disease, volume 98, number 10, pages 1448, ISSN 0191-2917, 2014. [DOI] |
|
| Keywords: | Maize chlorotic mottle virus; Zea mays; Maize; DRC; viruses of plants
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| Potato virus Y: an evolving concern for potato crops in the United States and Canada, Gray, S. M., De Boer, S.H, Lorenzen, J., Karasev, A. V., Singh, R, Nolte, P., Whitworth, J., Boucher, A. and Xu, H., in: Plant Disease, volume 94, number 12, pages 1384-1397, ISSN 0191-2917, 2010. [DOI] |
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| A tale of two epidemics: the contrasting dynamics of cassava mosaic and cassava brown streak diseases in East Africa, Legg, J., Jeremiah, S.*, Obiero, H., Maruthi, M. N., Ndyetabula, I.*, Okao-Okuja, G., Kim, D., Bouwmeester, H., Bigirimana, S.*, Tata-Hangy, W., Gashaka, G.*, Mkamilo, G.*, Alicai, T.* and Kumar, P. L., Abstract: PVEN-IPVEN Symposium, on exploiting agricultural and natural ecosystems, June 20-24, Cornell, Ithaca, New York, 2010. |
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| Biology, etiology, and control of virus diseases of banana and plantain, Kumar, P. L., Selvarajan, R.*, Iskra-Caruana, M. L., Chabannes, M. and Hanna, R., in: Advances in Virus Research, volume 91, pages 229-269, ISSN 0065-3527, 2015. [DOI] |
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| Cassava brown streak disease: the expanding pandemic, Shirima, R. R., Bigirimana, S.*, Gashaka, G.*, Tata-Hangy, K.*, Barumbanze, P.*, Ndayihanzamaso, P.*, Kanyange, M. C.*, Mutumwinka, M.*, Mukakanyana, C.*, Nyirahorana, C.*, Ntivuguruzwa, S.*, Sifa, A.*, Kazindu, J.*, Ndahimana, J.*, Umfuyisoni, J.*, Uwimana, J.*, Ughento, H.*, Musungayi, E.*, Swai, D., Obiero, H.*, Njaro, I.*, Akhwale, M., Otunga, M.*, Mpapale, J.* and Legg, J., Abstract, P. 131 in the Book of Abstracts of the 12th International Plant Virus Epidemiology Symposium, 28 January to 1 February 2013, the Ngurdoto Mountain Lodge, Arusha, Tanzania, 2013. |
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| Cassava brown streak virus diversity and development of improved virus diagnostics, Maruthi, M. N., Abarshi, M. M., Seal, S., Hillocks, R. J., Kumar, P. L. and Legg, J., Abstract presented at PVEN-IPVEN Symposium, Plant viruses: exploiting agricultural and natural ecosystems, June 20-24, Cornell, Ithaca, New York, 2010. |
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| Centennial of research on groundnut rosett disease:what is known and what still needs to be known to achieve effective control of this menace in Sub-Saharan Africa, Waliyar, F., Kumar, P. L., Osiru, M., Monyo, E., Ntare, B. R. and Nigam, S., pages 61, 2007. |
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| Community action in cassava brown streak disease control through clean seed, Mtunda, K.*, Legg, J., Ndyetabula, I.*, Jeremiah, S.*, Mvanda, K.*, Mutasingwa, G.* and Shumbusho, E.*, Abstract, P. 178 in the Book of Abstracts of the 12th International Plant Virus Epidemiology Symposium, 28 January to 1 February 2013, the Ngurdoto Mountain Lodge, Arusha, Tanzania, 2013. |
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| Comparative case studies of whitefly (Bemisia tabaci) vector-begomovirus diversity: associated effects on virus disease epidemiology in diverse study systems in Central America and sub-Saharan Africa (ABSTRACT), Brown, J., Palmieri, M. and Legg, J., Abstract, in the Book of Abstracts of the 12th International Plant Virus Epidemiology Symposium, 28 January to 1 February, the Ngurdoto Mountain Lodge, Arusha, Tanzania, 2013. |
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| Controlling cassava brown streak disease (CBSD) through genetic engineering, Nyaboga, E., Njiru, J., Taylor, N., Fauquet, C. and Tripathi, L., Abstract, P. 104, in the Book of Abstracts of the 12th International Plant Virus Epidemiology Symposium, 28 January to 1 February, the Ngurdoto Mountain Lodge, Arusha, Tanzania, 2013. |
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| Controlling the banana bunchy top disease pandemic in sub-Saharan Africa, Kumar, P. L., Hanna, R., Fotso, A., Soko, M.*, Akinbade, S., Alabi, O., Ngeve, J. and Naidu, R., Abstract presented at PVEN-IPVEN Symposium, Plant viruses: exploiting agricultural and natural ecosystems, June 20-24, Cornell, Ithaca, New York, 2010. |
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| Development of biomarkers for vector competent aphid and whitefly populations in sub-Saharan Africa, Igwe, D., Ngatat, S., Cilia, M., Bereman, M., MacCoss, M., Ghanim, M., Gray, S. M., Hanna, R. and Kumar, P. L., Abstract, p. 168, in the Book of Abstracts of the 12th International Plant Virus Epidemiology Symposium, 28 January to 1 February 2013, the Ngurdoto Mountain Lodge, Arusha, Tanzania, 2013. |
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| Ecology of the banana aphid Pentalonia nigronervose, the vector of banana bunchy top virus, Hanna, R., Ngatat, S., Ndjab, M. R., Fotso Kuate, A., Doumtsop, A. R. P. and Kumar, P. L., Abstract, p. 45, in the Book of Abstracts of the 12th International Plant Virus Epidemiology Symposium, 28 January to 1 February 2013, the Ngurdoto Mountain Lodge, Arusha, Tanzania, 2013. |
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| Effect of cassava brown streak disease on predominant cassava varieties in Malawi, Kamowa-Mbewe, W., Kumar, P. L., Changadeya, W.*, Ntawuruhunga, P. and Legg, J., Abstract, in the Book of Abstracts of the 12th International Plant Virus Epidemiology Symposium, 28 January to 1 February, the Ngurdoto Mountain Lodge, Arusha, Tanzania, 2013. |
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| Evaluation of pigeonpea genotypes for resistance to sterility mosaic disease, Shivam, C.V.B., Kumar, P. L. and Singh, R, pages 133, 2007. |
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| Expansion of Banana bunchy top virus pandemic into West Africa, Kumar, P. L., Hanna, R., Owati, A., Lokossou, B.*, Adegbola, R. O., Awosusi, O.*, Onyeani, C.*, Pefoura, A.*, Atiri, G.* and Asiedu, E. A.*, Abstract, p. 113, in the Book of Abstracts of the 12th International Plant Virus Epidemiology Symposium, 28 January to 1 February, the Ngurdoto Mountain Lodge, Arusha, Tanzania, 2013. |
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| Field epidemiology of cassava brown streak viruses in Tanzania (ABSTRACT), Jeremiah, S. C., Maruthi, M. N., Ijumba, J. N.* and Legg, J., Abstract, in the Book of Abstracts of the 12th International Plant Virus Epidemiology Symposium, 28 January to 1 February 2013, the Ngurdoto Mountain Lodge, Arusha, Tanzania, 2013. |
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| Frequency of Mixed Infection of Tobacco streeak virus and peanut bud necrosis virus in groundnut, Reddy, A., Kumar, P. L., Subrahmanyam, K, Waliyar, F. and Nigam, S., pages 159, 2007. |
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| Incidence and distribution of virus and virus-like diseases on yams (Dioscorea sp.) in the Republic of Benin, Eni, A., Hughes, J., Asiedu, R., Bandyopadhyay, R. and Kumar, P. L., in: 10th International Plant Virus Epidemiology Symposium, 15 - 19 October 2007, ICRIST, Hyderadad, India, pages 123, 2007. |
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| Managing the spread of cassava viruses through clean 'seed' systems (ABSTRACT), Hermence, C., Mtunda, K.*, Muhanna, M.*, Boniface, S., Jeremiah, S.*, Kanju, E. and Legg, J., Abstract, in the Book of Abstracts of the 12th International Plant Virus Epidemiology Symposium, 28 January to 1 February 2013, the Ngurdoto Mountain Lodge, Arusha, Tanzania, 2013. |
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| Mapping the regional epidemiology of cassava viruses in east and central Africa, Legg, J., Bouwmeester, H., Shirima, R. R., Jeremiah, S.*, Ndyetabula, I.*, Obiero, H.*, Mkamilo, G.*, Bigirimana, S.*, Gashaka, G.*, Tata-Hangy, K.*, Okao-Okuja, G.*, Alicai, T.* and Kumar, P. L., Abstract, P. 127 in the Book of Abstracts of the 12th International Plant Virus Epidemiology Symposium, 28 January to 1 February 2013, the Ngurdoto Mountain Lodge, Arusha, Tanzania, 2013. |
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| Multiplex RT-PCR assays for the simultaneous detection of cassava mosaic virus and cassava brown streak viruses, Maruthi, M. N., Musa, A., Legg, J., Kumar, P. L. and Hillocks, R. J., Abstract, P. 202 in the Book of Abstracts of the 12th International Plant Virus Epidemiology Symposium, 28 January to 1 February 2013, the Ngurdoto Mountain Lodge, Arusha, Tanzania, 2013. |
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| Occurrence and distribution of viruses infecting fluted pumpkin (Telfairia occidentalis, Hook F.) in Imo State, Nigeria, Oben, T., Atiri, G.*, Fagbola, O.*, Akinbade, S., Oyibo, P. and Kumar, P. L., pages 122, 2007. |
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| Occurrence, incidence and distribution of viruses infecting yam (Dioscorea spp.) in Nigeria, Asala, S.*, Alegbejo, M.*, Kashina, B. D.*, Banwo, O. O.*, Asiedu, R. and Kumar, P. L., Abstract, 2010. |
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| Plant virus ecology: regional overview, Kumar, P. L., 2009. |
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| Plant Virus Epidemiology Symposium: ecology, evolution and control of plant viruses and their vectors, Sciencedirect, Elsevier, 2014. [DOI] |
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| Prevalence of cassava viral diseases in different agro-ecological zones in the western part of Democratic Republic of Congo (ABSTRACT), Bakelana, T.*, Harvey, J., Calvert, L.*, Purdie, L.*, Skilton, R.*, Holton, T.*, Magembe, E.*, Macharia, M.*, Legg, J., Mahungu, N., Tata-Hangy, K., Lutete, D. and Kanana, T.*, Abstract, in the Book of Abstracts of the 12th International Plant Virus Epidemiology Symposium, 28 January to 1 February 2013, the Ngurdoto Mountain Lodge, Arusha, Tanzania, 2013. |
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| Production of monoclonal antibodies against cowpea mottle viruses, Akinbade, S., Mgbechi-Ezeri, J., Oben, T. and Kumar, P. L., pages 187, 2007. |
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| Susceptibility of Musa genotypes to banana bunchy top disease in Cameroon and implications for disease management, Ngatat, S., Hanna, R. and Kumar, P. L., Abstract, p. 176, in the Book of Abstracts of the 12th International Plant Virus Epidemiology Symposium, 28 January to 1 February 2013, the Ngurdoto Mountain Lodge, Arusha, Tanzania, 2013. |
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| The prevalence of Cassava Mosaic Begomoviruses in Malawi (ABSTRACT), Changadeya, W.*, Kamowa-Mbewe, W., Kumar, P. L., Legg, J. and Ntawuruhunga, P., Abstract, in the Book of Abstracts of the 12th International Plant Virus Epidemiology Symposium, 28 January to 1 February, the Ngurdoto Mountain Lodge, Arusha, Tanzania, 2013. |
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| Transmission of cassava brown streak viruses by Bemisia tabaci whiteflies (ABSTRACT), Jeremiah, S.*, Maruthi, M. N., Ijumba, J. N.* and Legg, J., Abstract, in the Book of Abstracts of the 12th International Plant Virus Epidemiology Symposium, 28 January to 1 February 2013, the Ngurdoto Mountain Lodge, Arusha, Tanzania, 2013. |
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| Virus diseases of chickpea, Kumar, P. L., Kumari, S. and Waliyar, F., pages 213-234, chapter 18, Studium Press LLC, ISBN 978-1933699332, 2008. |
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| Virus diseases of groundnut, Sreenivasulu, P.*, Reddy, Ch., Ramesh, B.* and Kumar, P. L., pages 47-98, chapter 29, Studium Press LLC, ISBN 978-1933699318, 2008. |
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| Virus diseases of pigeonpea, Kumar, P. L., Jones, A. T. and Waliyar, F., pages 235-257, chapter 19, Studium Press LLC, ISBN 978-1933699332, 2008. |
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| Viruses in weeds in Dioscorea yam fields in Nigeria, Asala, S.*, Shinggu, C. P.*, Asiedu, R. and Kumar, P. L., Abstract, 2010. |
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| Virus-vector transmission relationships for cassava brown streak viruses and the whitefly vector, Bemisia tabaci, Maruthi, M. N., Jeremiah, S.*, Mohammed, I. B. and Legg, J., Abstract, P. 48 in the Book of Abstracts of the 12th International Plant Virus Epidemiology Symposium, 28 January to 1 February 2013, the Ngurdoto Mountain Lodge, Arusha, Tanzania, 2013. |
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| Characterisation of resistance in cassava against viruses causing cassava mosaic and cassava brown streak disease in Africa, Koerbler, M., Stein, B., Ingelbrecht, I., Dixon, A. and Winter, S., 2008. |
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Abstract:
Cassava mosaic disease caused by diverse geminiviruses (CMG) and Cassava brown streak disease caused by cassava brown streak virus (CBSV), are key constraints to the cultivation of cassava in Sub-Sahara Africa. We have collected and characterised the diversity of the most prominent geminiviruses from all African cassava cultivation areas and Cassava brown streak viruses from East Africa, to use defined viruses for resistance studies in selected IITA cassava breeding lines and African land races. Virus infections were established in cassava by either graft inoculation with scions of virus infected plants or, by particle bombardment of cloned infectious viruses. Resistance against cassava mosaic geminiviruses was identified in several breeding lines e.g. TME 4, TMS 96/0529 and TMS 96/0160 responding with abortion of virus infections after virus introduction. Other genotypes, e.g. TMS 96/0304, became infected but recovered from symptoms but maintaining the infection status. When cassava clones were analysed for CBSV resistance, it became evident that geminivirus resistance was tightly correlated with susceptibility against CBSV. Geminivirus resistant cassava responded with often severe CBSV infections (e.g. TMS 96/0160) upon virus inoculation. Interestingly, cassava genotypes with an intermediate resistance, TMS 96/0304, initially became mixed infected with CBSV/CMG however subsequently aborting CMG, to establish single CBSV infections. Differential responses were also recorded for strains of CBSV. While CMG resistance in cassava was against all CMG, differential responses were observed in cassava inoculated with CBSV isolates obtained from Kenya and Mozambique. While the CMG susceptible cassava landrace TME 117 was resistant against CBSV from Kenya, it became infected with CBSV from Mozambique. Only the cassava genotype TMS/ 1089A revealed immunity against CMG and also did not establish infections with the CBSV isolates from diverse origins.
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| Evaluation of water yam (Dioscorea alata L.) germplasm for reaction to yam anthracnose and virus diseases and their effect on yield, Egesi, C. N.*, Odu, B., Ogunyemi, S., Asiedu, R. and Hughes, J., in: Journal of Phytopathology, volume 155, number 9, pages 536-543, 2007. |
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Abstract:
Use of genetic resistance is the most practical and economic way to manage major diseases of yams. In a search for sources of resistance, 40 water yam (Dioscorea alata L.) accessions from Benin, Ghana, Nigeria and Puerto Rico were screened under natural disease infection conditions in Ibadan, Nigeria. The accessions were evaluated at 1, 3 and 6 months after planting (MAP) for severity of yam anthracnose and viral diseases. The effect of the pathogens on yield was also evaluated at harvest 9 MAP. There were significant differences (P < 0.001) between accessions for severities of anthracnose and viral diseases. Eight (20%) of them had lower anthracnose area under disease progress curves (AUDPC) values than the resistant check while 10 (25%) had AUDPC values below the trial mean. There were significant variations (P < 0.001) in yield components among the accessions. There was significant negative correlation of anthracnose severity with fresh tuber yield (r = -0.51) and with number of tubers per plot (r = -0.40). Similarly, significant negative correlations were observed of virus disease severity with fresh tuber yield (r = -0.78) and number of tubers per plot (r = -0.65). Linear regression models also showed that the fresh yield had significant negative relationships with anthracnose (R2 = 0.26) and viral (R2 = 0.62) diseases. The accessions identified as resistant constitute a valuable resource for breeding of resistant germplasm.
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| First report of cucumber mosaic virus in yams (Dioscorea spp.) in Ghana, Togo and Republic of Benin in West Africa, Eni, A., Kumar, P. L., Asiedu, R., Alabi, O., Naidu, R.*, Hughes, J. and Rey, M.*, in: Plant Disease, volume 92, number 5, pages 833, ISSN 0191-2917, 2008. [DOI] |
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Abstract:
Yam (Dioscorea spp., family Dioscoreaceae) is one of the most important food crops cultivated in the West African yam zone comprising the forest and savannah areas of Nigeria, Ghana, Cote d'Ivoire, Republic of Benin, and Togo, which account for more than 90% of the 4.59 million ha of yam cultivation worldwide (1). A survey was conducted in 2005 to document viruses in yams in Ghana, Togo, and the Republic of Benin. Samples (1,405) from five species of yam showing mosaic, chlorosis, and stunting as well
as asymptomatic plants were tested for Dioscorea bacilliform virus (DBV, genus Badnavirus), Yam mosaic virus (YMV, genus Potyvirus), and Yam mild mosaic virus (YMMV, genus Potyvirus), the three most common viruses infecting yams. In addition, samples were tested for Cucumber mosaic virus (CMV), since CMV was previously reported to infect yams in Cote d'Ivoire (2) and Nigeria (3). In protein-A sandwich-ELISA with polyclonal antibodies to a cowpea isolate of CMV, 23 of the 1,405 samples (6 of 218 samples from Togo, 13 of 628 samples from Ghana, and 4 of 559 samples from Republic of Benin) tested positive for CMV.
The CMV-positive samples were from D. alata (N = 16) and D. rotundata (N = 7), whereas all samples from D. cayenensis, D. dumetorum, and D. bulbifera tested negative. CMV was detected as mixed infections with DBV, YMV, or YMMV in 21 of 23 samples. Some of these samples showed puckering, chlorosis, mottling, and crinkling, whereas some plants infected by two or more viruses were asymptomatic. Only two samples from D. rotundata had a single infection of CMV and they showed mild chlorotic symptoms in young leaves that were inconspicuous in mature leaves. In sap inoculations, the virus induced systemic mosaic in
Nicotiana glutinosa. The presence of CMV in ELISA-positive yam samples was further confirmed by immunocapture-reverse transcription (IC-RT)-PCR using CMV antibodies as trapping antibody and oligonucleotide primers specific for a 485 nt corresponding to 3' end of the coat protein gene and C-terminal noncoding region of RNA-3 (4). To confirm the specificity of ICRT-PCR, the 485-bp amplicons from an isolate from the Republic of Benin was cloned into pCR2.1 (Invitrogen, Carlsbad, CA) and three independent clones were sequenced from both orientations. Pairwise comparison of a consensus sequence (Accession No. EU274471) with corresponding sequences of other CMV isolates deposited in GenBank showed 99% identity at the nucleotide sequence level (Accession No. U22821) and revealed that the CMV isolate from yam belongs to sub-Group IA. To our knowledge,
this is the first report of CMV infection in yams (D. alata and D. rotundata) in Ghana, Togo, and the Republic of Benin. Together with a previous documentation of CMV in D. alata and D. trifida in Cote d'Ivoire and Nigeria (2,3), this report adds to existing knowledge on distribution of CMV in yams with implications for yam production and germplasm distribution in the West Africa Region.
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| Genetic transformation of cassava - independent of genotype, Jorgensen, K., Ingelbrecht, I., Jensen, S., Olsen, E., Sorensen, C., Kannangara, R. and Moller, B., 2008. |
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Abstract:
Cassava is a vegetatively propagated crop and its improvement through conventional breeding is challenging due to its high heterozygosity and low fertility. As it has not been possible to solve all cassava's problems connected to agriculture and consumption by traditional breeding, another solution could be to use molecular breeding. Major deficits of cassava are low protein content in the tubers, rapid post-harvest tuber deterioration and high content of cyanogenic glucosides. Careful processing of cassava roots is required to remove the released hydrogen cyanide which can cause acute or chronic cyanide intoxication. Unfortunately, processing to remove hydrogen cyanide typically results in loss of protein, minerals, and vitamins. For successfull molecular breeding of cassava, a genotype-independent genetic transformation method is essential. So far it has only been possible to transform model lines which have limited agricultural importance. Here a regeneration and transformation method is presented which has been successfully applied to all African varieties tested so far with a transformation frequency ranging from 0.2% to 3.8%. The method is based on the procedure developed by Li et al. (1996). This method is among others now used to 1) produce acyanogenic cassava (J{\o}rgensen et al 2005), 2) improve the nutritional value in the tubers, 3) virus resistance. The improvement of the nutritional value is focused on increasing the protein content in the tubers in varieties with and without a naturally increased levels of pro-vitamin A.
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| Severity of anthracnose and virus diseases of water yam (dioscorea alata L.) in NIgeria I: effects of yam genotype and date of planting, Egesi, C. N.*, Onyeka, T. and Asiedu, R., in: Crop Protection, volume 26, number 8, pages 1259-1265, ISSN 0261-2194, 2007. |
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Abstract:
Anthracnose and virus diseases exert devastating impacts on yam production in many tropical regions of the world where the crop contributes to food security and income generation. The complexities in their epidemiology necessitate the use of integrated approaches in their management. Six genotypes of Dioscorea alata, planted on six dates (March?August) in each of 1998 and 1999 in Ibadan, Nigeria, were evaluated to determine the effects of planting date and genotype on severity of the two diseases. The date of planting had a profound influence on anthracnose severity, contributing 72% of the observed variation due to combined effects of planting date, genotype and their interactions. In contrast, the genotype effect was most dominant with respect to virus severity, accounting for 85% of the total observed variation. Planting in August supported least anthracnose development while April and May plantings resulted in the least severity of virus diseases. While selection of planting time could be used to manage anthracnose disease, its application could be influenced by the prevailing weather conditions in a particular location. Two of the genotypes (TDa 291 and TDa 297) had low severity values for both diseases across the different planting dates. Availability of such sources of multiple disease resistance and appropriate choice of planting date would be very useful in integrated management of the two major yam diseases.
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| Somatic embryogenesis and genetic transformation of African farmer-grown cassava genotypes that are susceptible to the Cassava Brown Streak Disease, Ingelbrecht, I., Raji, A., Oyelakin, O., Winter, S., Moller, B., Dixon, A. and Jorgensen, K., 2008. |
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Abstract:
Cassava is one of the most important sources of carbohydrates for over 500 million people in the (sub)tropics. Cassava plays an important role in the food security of many developing nations, especially in sub-Saharan Africa (SSA). Cassava is highly heterozygous, genetically complex, and many varieties either do not flower or produce few seeds thus hampering conventional crop improvement. Several major constraints limit the production and utilization of cassava roots, including two viral diseases, the Cassava Brown Streak Disease (CBSD) and the Cassava Mosaic Disease (CMD), which are specific to SSA. Farmer-preferred landraces are often susceptible to CBSD and/or CMD. Genetic transformation of cassava could complement conventional breeding programs for CBSD and/or CMD resistance. Current protocols for genetic transformation of cassava are limited to model genotypes which are not used by farmers of breeders in SSA. Since transformation protocols are genotype-dependent, suitable procedures for genetic modification of the landraces need to be developed. We have established somatic embryogenesis and organogenesis for three farmer/breeder-preferred varieties, two from East Africa (cv Kibaha and cv Albert) and one from West Africa (TME12) which are susceptible to CBSD. Primary and cyclical somatic embryogenesis was established for the three varieties. Cotyledon tissues from somatic embryos were used as source explants for Agrobacterium-mediated genetic transformation. Using an intron-interrupted {\^a}{\"i}¿½glucuronidase reporter gene construct under control of the Cassava vein mosaic virus promoter, stably transformed cassava tissues and plants were obtained. Molecular evidence for stable expression of the transgenes will be presented.
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