Titles (20)Keywords (1)Abstracts (1)
Allelopathic potential of some biocontrol agents for the control of fungal rot of yellow yam (Dioscorea cayenensis Lam), Dania, V., Fadina, O.*, Ayodele, M. and Kumar, P. L., in: African Journal of Biotechnology, volume 14, number 6, pages 474-481, ISSN 1684-5315, 2015. [DOI]
 
Collecte des ignames cultivees du complexe Dioscorea cayenensis-rotundata au Benin, Dansi, A., Zoundjikekpon, J., Mignouna, H. and Quin, F., in: Plant Genetic Resources Newsletter, volume 112, pages 81-85, 1997.
 
Concentration of selected minerals and antinutritional factors and bioavailability of zinc and calcium in yellow yam (Dioscorea cayenensis) tubers, Maziya-Dixon, B., Akin-Idowu, P., Odunola, O.*, Asiedu, R. and Uwaifo, A. O.*, in: Plant Foods for Human Nutrition, 2006.
 
Cultivar evaluation and mega-environment investigation of Dioscorea cayenensis cultivars in Ghana based on the GGE Biplot analysis, Otoo, E.* and Asiedu, R., in: Journal of Food, Agriculture and Environment, volume 4, number 3&4, pages 162-166, 2006.
 
Domestication and evolutionary dynamics of cultivated yam (Dioscorea cayenensis /D. rotundata complex) in Benin, Dansi, A.*, Adjatin, A.*, Bhattacharjee, R., Asiedu, R., Vodouhe, R., Akouegninou, A.* and Sanni, A.*, Abstract in First Global Conference on Yam 'to harness research innovations to unleash the potential of yam', 3-6 October, 2013 Accra, Ghana, 2013.
 
Effects of two processing methods on some nutrients and anti-nutritional factors in yellow yam (Dioscorea cayenensis), Akin-Idowu, P., Asiedu, R., Maziya-Dixon, B., Odunola, A.* and Uwaifo, A.*, in: African Journal of Food Science, volume 3, number 1, pages 022-025, ISSN 1996-0816, 2009.
 
Evaluation of sixteen clones of selected yam (Dioscorea cayenensis-ro-tundata) in two agroecological zones in Togo, N'kpenu, E., Asiedu, R. and Tchala, W., 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.
 
Genetic diversity and relationship of Guinea yam (Dioscorea cayenensis Lam.-D. rotundata Poir. complex) germplasm in Benin (West Africa) using microsatellite markers, Loko, Y.*, Bhattacharjee, R., Agre, A. P.*, Dossou-Aminon, I.*, Orobiyi, A.*, Djedatin, G. L.* and Dansi, A.*, in: Genetic Resources and Crop Evolution, pages 1-15, ISSN 0925-9864, 2016. [DOI]
 
Identification of some Benin Republic's Guinea yam (Dioscorea cayenensis/Dioscorea rotundata complex) cultivars using Randomly Amplified Polymorphic DNA, Dansi, A., Mignouna, H., Zoundjihekpon, J., Sangare, A.*, Asiedu, R. and Ahoussou, N., in: Genetic Resources and Crop Evolution, volume 47, pages 619-625, ISSN 0925-9864, 2000.
 
Introduction and evaluation of improved varieties of Dioscorea rotundata, and D. cayenensis with high micronutrient content in Cameroon, Njukwe, E., Amah, D., Ndango, R., Tenkouano, A. 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 338-342, ISTRC-AB, 2010.
 
Morphological and isozymic diversity of the cultivated yams (Dioscorea cayenensis/Dioscorea rotundata complex) of Cameroon, Mignouna, H., Dansi, A. and Zok, S., in: Genetic Resources and Crop Evolution, volume 49, pages 21-29, 2002.
 
Morphological diversity, cultivar groups and possible descent in the cultivated yams (Dioscorea cayenensis/D. rotundata) complex in Benin Republic, Dansi, A., Mignouna, H., Zoundjikekpon, J., Sangare, A.*, Asiedu, R. and Quin, F., in: Genetic Resources and Crop Evolution, volume 46, number 4, pages 371-388, ISSN 0925-9864, 1999.
 
Ploidy level of the cultivated yams (Dioscorea cayenensis/D. rotundata complex) from Benin Republic as determined by chromosome counting and flow cytometry, Dansi, A., Pillay, M., Mignouna, H., Dainou, O., Mondeil, F. and Moutairou, K.*, in: African Crop Science Journal, volume 8, number 4, pages 355-364, ISSN 1021-9730, 2000.
 
Ploidy level studies on the Dioscorea cayenensis/Dioscorea rotundata complex core set, Obidiegwu, J., Loureiro, J.*, Ene-Obong, E.*, Rodriguez, E.*, Kolesnikova-Allen, M.+, Santos, C.*, Muoneke, C. O.* and Asiedu, R., in: Euphytica, volume 169, number 3, pages 319-326, ISSN 0014-2336, 2009.
 
Ploidy variation in the cultivated yams (Dioscorea cayenensis-Dioscorea rotundata complex) from Cameroon as determined by flow cytometry, Dansi, A., Mignouna, H., Pillay, M. and Zok, S., in: Euphytica, volume 119, pages 301-307, ISSN 0014-2336, 2001.
 
SSR markers reveal diversity in Guinea yam (Dioscorea cayenensis/D. rotundata) core set, Obidiegwu, J., Kolesnikova-Allen, M.+, Ene-obong, E. E.*, Muoneke, C. O.* and Asiedu, R., in: African Journal of Biotechnology, volume 8, number 12, pages 2730-2739, ISSN 1684-5315, 2009.
 
The prevalence of badnaviruses in West African yams (Dioscorea cayenensis-rotundata) and evidence of endogenous pararetrovirus sequences in their genomes, Seal, S., Turaki, A., Muller, E., Kumar, P. L., Kenyon, L., Filloux, D., Galzi, S., Lopez-Montes, A. and Iskra-Caruana, M. L., in: Virus Research, volume 186, pages 144-154, ISSN 0168-1702, 2014. [DOI]
 
Using isozyme polymorphism to assess genetic variation within cultivated yams (Dioscorea cayenensis/Dioscorea rotundata complex) of the Republic of Benin, Dansi, A., Mignouna, H., Zoundjihekpon, J., Sangare, A.*, Asiedu, R. and Ahoussou, N., in: Genetic Resources and Crop Evolution, volume 47, pages 371-383, 2000.
 
Variation in nutrient and antinutrient contents of tubers from yellow yam (Dioscorea cayenensis) genotypes grown at two locations, Akin-Idowu, P., Odunola, O.*, Asiedu, R., Maziya-Dixon, B. and Uwaifo, A. O.*, in: Journal of Food, Agriculture and Environment, volume 6, number 3-4, pages 95-100, ISSN 1459-0255, 2008.
 
Varietal identification key of the cultivated yams (Dioscorea cayenensis / Dioscorea rotundata complex) of Benin republic, Dansi, A., Mignouna, H., Zoundjihekpon, J., Sangare, A.* and Asiedu, R., in: Plant Genetic Resources Newsletter, volume 116, pages 18-25, 1998.
 
Effects of two processing methods on some nutrients and anti-nutritional factors in yellow yam (Dioscorea cayenensis), Akin-Idowu, P., Asiedu, R., Maziya-Dixon, B., Odunola, A.* and Uwaifo, A.*, in: African Journal of Food Science, volume 3, number 1, pages 022-025, ISSN 1996-0816, 2009.
 
Keywords:Antinutrients; boiling; Dioscorea cayenensis; phytic acid; pounding and tannin

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.