Titles (83)Keywords (1)Abstracts (3)
A genetic linkage map of water yam (Dioscorea alata L.) based on AFLP markers and QTL analysis for anthracnose resistance, Mignouna, H., Mank, R., Ellis, T., Van den Bosch, N., Asiedu, R., Abang, M. and Peleman, J., in: Theoretical and Applied Genetics, volume 105, pages 726-735, 2002. [DOI]
 
A standardized RNA isolation protocol for yam (Dioscorea alata L) cDNA library construction, Narina, S. S., Mohammed, I. B., Asiedu, R. and Mignouna, H. D.*, in: Virginia Journal of Science, volume 60, number 4, pages 171-180, ISSN 0042-658X, 2009.
 
A technique for grafting water yam (Dioscorea alata), Shiwachi, H ., Ayankanmi, T. and Asiedu, R., in: Paper presented at: Proceedings of the 8th Symposium of the International Society for Tropical Root Crops-Africa Branch, Ibadan, Nigeria, 2003.
 
AFLP marker diversity in water yam (Dioscorea alata L.), Egesi, C. N.*, Asiedu, R., Ude, G., Ogunyemi, S. and Egunjobi, J.*, in: Plant Genetic Resources: Characterization and Utilization, volume 4, number 3, pages 181-187, ISSN 1479-2621, 2006.
 
Agronomic performance and consumer acceptability of improved water yam (Dioscorea alata L.) varieties in the Republic of Benin, Dansi, M.*, Loko, Y.*, Fakorede, J.*, Agre, A. P., Laly, J.*, Amegan, A.*, Ogou, H.*, Adebola, P. O., Yedomonhan, H.* and Dansi, A.*, in: Journal of Agriculture and Food Research, volume 18, number -: 101292, pages 1-12, ISSN 2666-1543, 2024. [DOI]
 
An EST-SSR based genetic linkage map and identification of QTLs for anthracnose disease resistance in water yam (Dioscorea alata L.), Bhattacharjee, R., Nwadili, C., Saski, C. A., Agre, A. P., Scheffler, B. E., Augusto, J., Lopez-Montes, A., Onyeka, T. J.*, Kumar, P. L. and Bandyopadhyay, R., in: PLoS ONE, volume 13, number 10:e0197717, pages 1-16, ISSN 1932-6203, 2018. [DOI]
 
An EST-SSR based genetic linkage map of water yam (Dioscorea alata L.) and identification of QTL (s) for anthracnose disease: proceeding (poster), Bhattacharjee, R., Nwadili, C., Saski, C. A., Scheffler, B. E., Onyeka, J.*, Augusto, J., Lopez-Montes, A., Asiedu, R., Kumar, P. L. and Bandyopadhyay, R., 2016.
 
Analysis of tuber yield- and maturity- related traits in water yam (Dioscorea alata L.), Sartie, A. M., Franco, J. and Asiedu, R., in: Journal of Agricultural Science and Technology B, volume 1, pages 311-322, ISSN 1939-1250, 2011.
 
Assessing food quality in farmer participatory varietal selection of Water Yam (Dioscorea alata L.), Okonkwo, C., Dossou, R.*, Zoupoya, K., N'kpenu, E., Otoo, E.*, Alhassan, A. Y., Echekwu, C. A. and Asiedu, R., in: 9th Triennial Symposium of the International Society for Tropical Root Crops-Africa Branch (ISTRC-AB); October 31 to November 5, 2004, Mombasa, Kenya, 2004.
 
Assessment of some high ratio propagation technologies for quality seed yam tuber production in Dioscorea alata L. and Dioscorea rotundata Poir, Pelemo, O. S.*, University of Ibadan, 2021.
 
Assessment of water yam (Dioscorea alata L.) landrace varieties for resistance to anthracnose disease, Bakayoko, L., Pokou, D. N., Essis, B. S., Kouakou, A. M., Dibi, K. E. B., Kouassi, A. B., Nzue, B., Koutouan, T. T., Zohouri, P. G., N'guetta, A. S., Agre, A. P., Mondo, J. and Adebola, P. O., in: African Journal of Agricultural Research, volume 18, number 3: 2A80CC368784, pages 178-193, ISSN 1991-637X, 2022. [DOI]
 
Characterisation of yam starch, and optimization of processing parameters of instant noodle from wheat flour and yam (Dioscorea alata) starch blends supplemented with egg powder, Musa, O. B.*, University of Ibadan, 2023.
 
Classification of water yam (Dioscorea alata) landraces by inter-simple sequence repeat (ISSR), Ichitani, K., Onjo, M. and Shiwachi, H ., in: Paper presented at the 104th Conference of the Japanese Society of Breeding, March, 2003.
 
Colchicine-induced variations in survival rate and morphological characteristics of water yam (Dioscorea alata), Ajayi, A. T.*, Adesoye, A. I.*, Asiedu, R. and Sartie, A. M., in: Field and Vegetable Crops Research, volume 47, number 2, pages 485-498, ISSN 1821-3944, 2010.
 
Comparative effects of explant source and genotype on in vitro tuberization in Dioscorea alata and D. rotundata, Balogun, M., Ng, S. Y. C., Shiwachi, H ., Ng, N. Q. and Fawole, I., in: Tropical Science, volume 44, number 4, pages 196-200, 2004.
 
Comparative reliability of screening parameters for anthracnose resistance in water yam (Dioscorea alata), Nwadili, C., Augusto, J., Bhattacharjee, R., Atehnkeng, J., Lopez-Montes, A., Onyeka, T. J.*, Kumar, P. L., Asiedu, R. and Bandyopadhyay, R., in: Plant Disease, pages 1-8, ISSN 0191-2917, 2016. [DOI]
 
Contribution a la caracterisation agro-morphologiques des ignames de l'espece Dioscorea alata L. en Cote d'Ivoire, Kouakou, A. M., Mignouna, H., Ng, N. Q., Asiedu, R., Zoundjihekpon, J., Ahoussou, N., Doumbia, S. and Zohouri, P. G., in: Root crops: the small processor and development of local food industries for market economy: proceeding of the Eighth Triennial Syposium of the International Society for Tropical Root Crops - Africa Branch (ISTRC-AB), 12-16 November 2001, Ibadan, Nigeria, pages 620-625, 2003.
 
Convolutional neural network allows amylose content prediction in yam (Dioscorea alata L.) flour using near infrared spectroscopy, Houngbo, M. E., Desfontaines, L., Diman, J. L., Arnau, G., Mestres, C., Davrieux, F., Rouan, L., Beurier, G., Marie-Magdeleine, C., Meghar, K., Alamu, E. O., Otegbayo, B.* and Cornet, D., in: Journal of the Science of Food and Agriculture, pages 1-15, ISSN 0022-5142, 2023. [DOI]
 
Dead skin on yams (Dioscorea alata) caused by Colletotrichum gloeosporioides, Green, K. and Simons, S. A., in: Plant Pathology, volume 43, number 6, pages 1062-1065, ISSN Online: 1365-3059, 1994.
 
Development of mapping populations for genetic analysis in yams (Dioscorea rotundata and D. alata), Sartie, A. M. and Asiedu, R., Abstract (Oral presentation) in Book of Abstracts of the 11th Triennial Symposium of ISTRC-AB, held at Memling Hotel, Kinshasa. 4-8 October, 2010.
 
Development of mapping populations for genetic analysis in yams (Dioscorea rotundata Poir. and Dioscorea alata L.), Sartie, A. M. and Asiedu, R., in: African Journal of Biotechnology, volume 10, number 16, pages 3040-3050, ISSN 1684-5315, 2011.
 
Development of microsatellite markers for anthracnose resistance in greater yam (Dioscorea alata L.) from expressed sequence tags of heterologous crop species, Narina, S. S., Montegue, P., Asiedu, R. and Mohamed, A. I., in: Journal of Root Crops, volume 38, number 1, pages 64-69, ISSN 0378-2409, 2012.
 
Distinction of mixed yam strains (Dioscorea alata L.) cultivated in Yaku Island, Onjo, M., Matsuo, T., Hakariya, S., Shiwachi, H . and Hayashi, M., in: Kagoshima University Research Center for the Pacific Islands Occasional Papers, volume 38, pages 37-41, 2003.
 
Diversity of water yam (Dioscorea alata L.) accessions from Cote d'Ivoire based on SNP markers and agronomic traits, Bakayoko, L., Pokou, D. N., Kouassi, A. B., Agre, A. P., Kouakou, A. M., Dibi, K. E. B., Nzue, B., Mondo, J., Adebola, P. O., Akintayo, O. T., Asfaw, A. and N'guetta, A. S., in: Plants, volume 10, number 12: 2562, pages 1-18, ISSN 2223-7747, 2021. [DOI]
 
Effect of collecting time of scions and treatment of gibberellin and uniconazole-P on the growth of vine cuttings in water yam (Dioscorea alata L.), Matsumoto, R., Shiwachi, H ., Kikuno, H ., Irie, K. and Toyohara, H., in: Japanese Society for Tropical Agriculture, Research for Tropical Agriculture, October 09-10, Okinawa, Japan., pages 51-52, 2010.
 
Effect of collection time of scions and treatment with Gibberellin and Uniconazol-P on the growth of vine cutting in water yam (Dioscorea alata L.), Matsumoto, R., Shiwachi, H ., Kikuno, H ., Irie, K. and Toyohara, H., in: Research for Tropical Agriculture, volume 4, number 1, pages 22-26, 2011.
 
Effect of mineral fertilisation on tuber yield and quality in Yams (Dioscorea alata and Dioscorea rotundata), Afolabi, F.*, Matsumoto, R., Akinwande, B.*, Otegbayo, B.* and Asfaw, A., in: Agriculture, volume 13, number 12: 2240, pages 1-14, ISSN 2077-0472, 2023. [DOI]
 
Effect of staking and non-staking systems on disease severity, yield and quality attributes of yams (Dioscorea alata), Norman, P. E.*, Whyte, J., Samura, A. E.*, Massaquoi, A.*, Sessay, L.*, Dixon, A., Fomba, S. N.*, Benya, M.T.* and Sowa, M.*, in: Journal of Agriculture and Ecology Research International, volume 2, number 4, pages 219-229, ISSN 2394-1073, 2015. [DOI]
 
Effect of water yam (Dioscorea alata) flour fortified with distiller's spent grain on nutritional, chemical, and functional properties, Awoyale, W., Maziya-Dixon, B., Sanni, L. O.* and Shittu, T.*, in: Food Science & Nutrition, pages 1-10, ISSN 2048-7177, 2015. [DOI]
 
Elite genotypes of water yam (Dioscorea alata) yield food product quality comparable to white yam (Dioscorea rotundata), Adesokan, M., Alamu, E. O., Fawole, S., Asfaw, A. and Maziya-Dixon, B., in: Applied Sciences, volume 14, number 9: 3704, pages 1-15, ISSN 2076-3417, 2024. [DOI]
 
Environmental stability of resistance to anthracnose and virus diseases of water yam (Dioscorea alata), Egesi, C. N.*, Onyeka, T. J.* and Asiedu, R., in: African Journal of Agricultural Research, volume 4, number 2, pages 113-118, ISSN 1991-637X, 2009.
 
Etude du fonctionnement physiologique d'un couvert végétal d'igname (Dioscorea alata), Cornet, D., Hammouya, D. and Bonhomme, R., in: Proceedings of the 41th International meeting of the CFCS, Le Gosier, Guadeloupe, 2005.
 
Evaluation of phenotypic variation in water yam (Dioscorea alata L.) germplasm using multivariate analysis, Egesi, C. N.*, Asiedu, R., Egunjobi, J.* and Ogunyemi, S., in: Root crops: the small processor and development of local food industries for market economy: proceeding of the Eighth Triennial Syposium of the International Society for Tropical Root Crops - Africa Branch (ISTRC-AB), 12-16 November 2001, Ibadan, Nigeria, pages 461-468, 2003.
 
Evaluation of water yam (Dioscorea alata I.) genotypes for reaction to yam anthracnose disease, Ogunyemi, S. and Asiedu, R., in: Proceedings of 9th ISTRC-AB symposium, pages 368-374, Mombasa, Kenya, 2007.
 
Evaluation of water yam (Dioscorea alata L.) genotypes for reaction to yam anthracnose disease, Ogunyemi, S. and Asiedu, R., in: 9th Triennial Symposium of the Internaitonal Society for Tropical Root Crops-Africa Branch (ISTRC-AB); October 31 to November 5, 2004, Mombasa, Kenya, 2004.
 
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.
 
Farmer participatory clonal selection of Water Yam (Dioscorea alata) in West Africa, Okonkwo, C., Dossou, R.*, Zoupoya, K., N'kpenu, E., Otoo, E.*, Alhassan, A. Y., Echekwu, C. A. and Asiedu, R., in: 9th Triennial Symposium of the Internaitonal Society for Tropical Root Crops-Africa Branch (ISTRC-AB); October 31 to November 5, 2004, Mombasa, Kenya, 2004.
 
Generation and analysis of expressed sequence tags (ESTs) for marker development in yam (Dioscorea alata L.), Narina, S. S., Buyyarapu, R., Kottapalli, K. R., Sartie, A. M., Ali, M. I., Asiedu, R., Hodeba, M.*, Sayre, B. L. and Scheffler, B. E., in: BMC Genomics, volume 12, number 100, pages 1-10, ISSN 1471-2164, 2011. [DOI]
 
Genetic characterization of some water yam (Dioscorea alata L.) accessions in West Africa with simple sequence repeats, Obidiegwu, J., Asiedu, R., Ene-Obong, E.*, Muoneke, C. O.* and Kolesnikova-Allen, M.+, in: Journal of Food, Agriculture and Environment, volume 7, number 3&4, pages 634-638, ISSN 1459-0255, 2009.
 
Genetic characterization of some water yam (Dioscorea alata L.) in West Africa with simple sequence repeats, Obidiegwu, J., Asiedu, R., Ene-obong, E. E.*, Muoneke, C. O.* and Kolesnikova-Allen, M.+, Abstract (Oral presentation) in Book of Abstracts of the 11th Triennial Symposium of ISTRC-AB, held at Memling Hotel, Kinshasa. 4-8 October, 2010.
 
Genetic diversity of organoleptic properties in water yam (Dioscorea alata L.), Egesi, C., Asiedu, R., Egunjobi, J.* and Bokanga, M., in: Journal of the Science of Food and Agriculture, volume 83, pages 858-865, ISSN 0022-5142, 2003. [DOI]
 
Genome-wide association analysis for tuber dry matter and oxidative browning in water yam (Dioscorea alata L.), Gatarira, C., Agre, A. P., Matsumoto, R., Edemodu, A., Adetimirin, V.*, Bhattacharjee, R., Asiedu, R. and Asfaw, A., in: Plants, volume 9, number 8: 969, pages 1-19, ISSN 2223-7747, 2020. [DOI]
 
Genome-wide association studies for sex determination and cross-compatibility in water yam (Dioscorea alata L.), Mondo, J., Agre, A. P., Asiedu, R., Akoroda, M. O.* and Asfaw, A., in: Plants, volume 10, number 7: 1412, pages 1-18, ISSN 2223-7747, 2021. [DOI]
 
Genome-wide genotyping elucidates the geographical diversification and dispersal of the polyploid and clonally propagated yam (Dioscorea alata L.), Sharif, B. M., Burgarella, C., Cormier, F., Mournet, P., Causse, S., Van, K. N.*, Kaoh, J.*, Rajaonah, M. T.*, Lakshan, S. R.*, Waki, J.*, Bhattacharjee, R., Gueye, B., Pachakkil, B., Arnau, G. and Chair, H., in: Annals of Botany, volume 126, number 6, pages 1029-1038, ISSN 0305-7364, 2020. [DOI]
 
Genomic resources for water yam (Dioscorea alata L.): analyses of EST sequences, De Novo sequencing and GBS libraries, Saski, C. A., Bhattacharjee, R., Scheffler, B. E. and Asiedu, R., in: PLoS ONE, volume 10, number 7(e0134031), pages 1-14, ISSN 1932-6203, 2015. [DOI]
 
Genotype x environment interaction in water yam (Dioscorea alata) yield trials in five yam-growing sites in Nigeria, Egesi, C. N.*, Ogunyemi, S. and Asiedu, R., in: Journal of Genetics and Breeding, volume 59, pages 81-88, 2005.
 
Identification and potential application of RAPD markers for anthracnose resistance in water yam (Dioscorea alata), Mignouna, H., Abang, M., Onasanya, A. and Asiedu, R., in: Annals of Applied Biology, volume 141, pages 61-66, 2002.
 
Identification of EST-SSR and SNP markers for linkage mapping in Dioscorea alata L., Bhattacharjee, R., Scheffler, B. E., Nwadili, C., Bandyopadhyay, R. and Lopez-Montes, A., Abstract, in the Book of Abstracts, 16th Triennial Symposium of the International Society for Tropical Root Crops (ISTRC), 23 - 28, September, 2012.
 
Identification of QTLs controlling resistance to anthracnose disease in water yam (Dioscorea alata), Agre, A. P., Darkwa, K.*, Olasanmi, B.*, Kolade, O., Mournet, P., Bhattacharjee, R., Lopez-Montes, A ., De Koeyer, D ., Adebola, P. O., Kumar, P. L., Asiedu, R. and Asfaw, A., in: Genes, volume 13, number 2: 347, pages 1-16, ISSN 2073-4425, 2022. [DOI]
 
Influence of explant condition on microtuberization of yams (Dioscorea alata and D. rotundata), Kikuno, H ., Shiwachi, H ., Onjo, M. and Asiedu, R., in: Japanese Society for Tropical Agriculture, volume 48, number 2, pages 71-72, 2004.
 
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.
 
Morphological variability within a ploidy level in Dioscorea alata L. germplasm, Adeigbe, O. O.*, Sartie, A. M., Ilori, C. O.*, Lopez-Montes, A. and Asiedu, R., Abstract, P.48 in the Book of Abstracts, 16th Triennial Symposium of the International Society for Tropical Root Crops (ISTRC), 23 - 28, September, 2012.
 
Morphological, SSR and ploidy analysis of water yam (Dioscorea alata L.) accessions for utilization of aerial tubers as planting materials, Girma Tessema, G., Gedil, M. and Spillane, C., in: Genetic Resources and Crop Evolution, pages 1-15, ISSN 0925-9864, 2015. [DOI]
 
Multi-trait selection index for simultaneous selection of water yam (Dioscorea alata L.) genotypes, Ouattara, F., Agre, A. P., Adejumobi, I. I., Akoroda, M. O.*, Sorho, F., Ayolié, K. and Bhattacharjee, R., in: Agronomy, volume 14, number 1: 128, pages 1-21, ISSN 2073-4395, 2024. [DOI]
 
Nutritional and biochemical composition of D. alata (Dioscorea spp.) tubers, Baah, F. D.*, Maziya-Dixon, B., Asiedu, R., Oduro, I.* and Ellis, W.*, in: Journal of Food, Agriculture and Environment, volume 7, number 2, pages 373-378, ISSN 1459-0255, 2009.
 
Organoleptic quality assessment of major traditional yam products from greater yam (Dioscorea alata), Baah, F., Maziya-Dixon, B., Asiedu, R., Oduro, I.* and Ellis, W.*, in: Root and tuber crops for poverty alleviation through science and technology for sustainable development: proceedings of the 10th symposium of ISTRC-AB held from 8-12 October, 2007 in Maputo, Mozambique, pages 463, ISTRC-AB, 2010.
 
Phenotypic and molecular assessment of genetic structure and diversity in a panel of winged yam (Dioscorea alata) clones and cultivars, Agre, A. P., Asibe, F., Darkwa, K., Edemodu, A., Bauchet, G. J., Asiedu, R., Adebola, P. O. and Asfaw, A., in: Scientific Reports, volume 9, number -: 18221, pages 1-11, ISSN 2045-2322, 2019. [DOI]
 
Ploidy analysis in water yam, Dioscorea alata L., germplasm, Egesi, C., Pillay, M., Asiedu, R. and Egunjobi, J.*, in: Euphytica, volume 128, number 2, pages 225-230, 2002.
 
Ploidy levels of Dioscorea alata L. germplasm determined by flow cytometry, Obidiegwu, J., Rodriguez, E.*, Ene-Obong, E.*, Loureiro, J.*, Muoneke, C. O.*, Santos, C.*, Kolesnikova-Allen, M.+ and Asiedu, R., in: Genetic Resource and Crop Evolution, 2009. [DOI]
 
Ploidy levels of Dioscorea alata L. germplasm determined by flow cytometry, Obidiegwu, J., Rodriguez, E.*, Ene-Obong, E.*, Loureiro, J.*, Muoneke, C. O.*, Santos, C.*, Kolesnikova-Allen, M.+ and Asiedu, R., in: Proceedings of the 43rd Annual Conference of the Agricultural Society of Nigeria, pages 72-77, Agricultural Society of Nigeria, 2009.
 
Possibility of early-season culture of water yam (Dioscorea alata L.) in Yaku island, Onjo, M., Shiwachi, H . and Hayashi, M., in: Kagoshima University Research Center for the Pacific Islands Occasional Papers, volume 38, pages 43-46, 2003.
 
Potential health benefits of water yam (Dioscorea alata), Dufie, W.*, Oduro, I.*, Ellis, W.*, Asiedu, R. and Maziya-Dixon, B., in: Food and Function, volume 4, pages 1496-1501, ISSN 2042-6496, 2013. [DOI]
 
Prediction of the suitability of water yam (Dioscorea alata) for amala product using pasting and sensory characteristics, Wireko-Manu, F. D.*, Ellis, W.*, Oduro, I.*, Asiedu, R. and Maziya-Dixon, B., in: Journal of Food Processing and Preservation, pages 1-7, ISSN 0145-8892, 2013. [DOI]
 
Quantitative methods for assessing the severity of anthracnose on yam (Dioscorea alata), Simons, S. A. and Green, K., in: Tropical Science, volume 34, pages 216-224, ISSN 0041-3291, 1994.
 
Reaction of Dioscorea alata (water yam) to anthracnose disease in Nigeria, Aduramigba-Modupe, A.O., Asiedu, R. and Odebode, C. A.*, in: Journal of Food, Agriculture and Environment, volume 6, number 3-4, pages 248-252, 2008.
 
Relationship between dormancy and its release and external factors in tubers of water yam (Dioscorea alata L.), Park, B., Onjo, M., Tominaga, s., Shiwachi, H . and Hayashi, M., in: Japanese Journal of Tropical Agriculture, volume 47, pages 42-50, 2003.
 
Screening of F1 mapping population of yam (Dioscorea alata) for resistance to anthracnose (Colletotrichum gloeosporioides) in the screenhouse and field, Nwadili, C., Bandyopadhyay, R., Bhattacharjee, R., Augusto, J., Lopez-Montes, A. and Onyeka, T. J.*, Abstract in First Global Conference on Yam 'to harness research innovations to unleash the potential of yam', 3-6 October, 2013 Accra, Ghana, 2013.
 
Screening of new improved water yam (Dioscorea alata) genotypes of the preparation of amala in Nigeria, Ukpabi, U. J.*, Omodamiro, J. G.*, Ikeorgu, J.* and Asiedu, R., in: Root and tuber crops for poverty alleviation through science and technology for sustainable development: proceedings of the 10th symposium of ISTRC-AB held from 8-12 October, 2007 in Maputo, Mozambique, pages 259-265, ISTRC-AB, 2010.
 
Screening of water yam (Dioscorea alata L.) genotypes for reactions to viruses in Nigeria, Odu, B., Asiedu, R., Shoyinka, S.* and Hughes, J., in: Journal of Phytopathology, volume 154, number 11-12, pages 716-724, ISSN 0931-1785, 2006.
 
Secondary metabolites content may clarify the traditional selection process of the greater yam cultivars (Dioscorea alata L.), Lebot, V., Malapa, R.*, Abraham, K.*, Molisale, T.*, Van Kien, N.*, Gueye, B. and Waki, J.*, in: Genetic Resources and Crop Evolution, volume 65, pages 1699-1709, ISSN 0925-9864, 2018. [DOI]
 
Sensory evaluation of amala from improved water yam (Dioscorea alata) genotypes in Nigeria, Ukpabi, U. J.*, Omodamiro, R. M.*, Ikeorgu, J.* and Asiedu, R., in: African Journal of Biotechnology, volume 7, number 8, pages 1134-1138, ISSN 1684-5315, 2008.
 
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.
 
Shoot and plantlet regeneration from meristems of Dioscorea rotundata poir and Dioscorea alata L., Adeniyi, O. J., Adetimirin, V.*, Ingelbrecht, I. and Asiedu, R., in: African Journal of Biotechnology, volume 7, number 8, pages 1003-1008, ISSN 1684-5315, 2008.
 
Simple sequence repeat markers and endogenous phytochemicals associated with somatic embryogenesis in Dioscorea alata L. and Dioscorea rotundata poir, Ossai, C. O.*, University of Ibadan, 2021.
 
Studies on Colletotrichum gloeosporioides (Penz) species complex distribution in six states of Nigeria and status on some selected water yam (Dioscorea alata L.) accessions, Asibe, F. A.*, Federal University of Agriculture, 2023.
 
Suitability of Dioscorea alata genotypes for making traditional food products in West Africa, Baah, F., Maziya-Dixon, B., Asiedu, R., Ellis, W.* and Oduro, I.*, in: Fourteenth triennial symposium of ISTRC, Trivandrum, Kerala, India, 2006, pages 36, International Society for Tropical Root Crops (ISTRC), 2006.
 
Understanding the genetic diversity and population structure of yam (Dioscorea alata L.) using microsatellite markers, Arnau, G., Bhattacharjee, R., Sheela, M.N.*, Chair, H., Malapa, R.*, Lebot, V., Abraham, K.*, Perrier, X., Petro, D., Penet, L. and Pavis, C., in: PLoS ONE, volume 12, number 3(e0174150), pages 1-17, ISSN 1932-6203, 2017. [DOI]
 
Variation in pasting and functional properties of flours and starches from water yam (Dioscorea alata), Oke, M. O.*, Awonorin, S.*, Asiedu, R., Maziya-Dixon, B. and Sanni, L., in: Securing livelihoods through yams: proceedings of a technical workshop on progress in yam research for development in west and central Africa held in Accra, Ghana, 11-13 September, 2007, pages 269-278, International Institute of Tropical Agriculture (IITA), 2009.
 
Viruses infecting cultivated yams (Dioscorea alata and D. rotundata) in Nigeria, Hughes, J., Dongo, L. and Atiri, G.*, in: Phytopathology, volume 87, number S-45, 1997.
 
Water yam (Dioscorea alata L.) growth and tuber yield as affected by rotation and fertilization regimes across an environmental gradient in west Africa, Pouya, N., Hgaza, V. K., Kiba, D. I., Bomisso, L., Aighewi, B., Ake, S. and Frossard, E., in: Agronomy, volume 12, number 4: 792, pages 1-22, ISSN 2073-4395, 2022. [DOI]
 
Water yam (Dioscorea alata), a neglected crop with high potential in West Africa, Okonkwo, C., Adeniji, M. and Asiedu, R., in: 9th Triennial Symposium of International Society for Tropical Root Crops-Africa Branch (ISTRC-AB); October 31 to November 5, 2004, Mombasa, Kenya, 2004.
 
Yam (Dioscorea rotundata Poir. and D. alata L.) meristem culture - optimization and genetic stability study of micropropagated plants, Adeniyi, O. J., Adetimirin, V.*, Ingelbrecht, I. and Asiedu, R., in: 9th Triennial Symposium of the International Society for Tropical Root Crops-Africa Branch (ISTRC-AB); October 31 to November 5, 2004, Mombasa, Kenya, 2004.
 
Yam (Dioscorea rotundata Poir. and Dioscorea alata L.) meristem culture optimization and phenotypic stability of micropropagated plants, Adeniyi, O. J., Adetimirin, V.*, Ingelbrecht, I. and Asiedu, R., in: Proceedings of 9th ISTRC-AB symposium, 1 - 5 November 2004, pages 316-323, Mombasa, Kenya, 2007.
 
Development of mapping populations for genetic analysis in yams (Dioscorea rotundata and D. alata), Sartie, A. M. and Asiedu, R., Abstract (Oral presentation) in Book of Abstracts of the 11th Triennial Symposium of ISTRC-AB, held at Memling Hotel, Kinshasa. 4-8 October, 2010.
 
Keywords:Dioscorea alata, Dioscorea rotundata, Hybrid identification, Molecular markers, Trait mapping, Yam

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.
 
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.

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]
 
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.

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.
 
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.