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Yam (Dioscorea spp.), a multispecies, polyploidy, and vegetatively propagated crop, is an economically important staple food for more than 300 million people in West Africa, Asia, Oceania, and the Caribbean. The five major yam-producing countries in West Africa (Bénin, Côte d’Ivoire, Ghana, Niger...


Gedil, M.Bhattacharjee, R.López Montes, A.[Genomics for transforming yam breeding]Genomics for transforming yam breeding
Autor: Tripathi, L.

Biotechnology has opened unprecedented avenues for exploring biological systems. Transgenics is one of the key techniques particularly useful for the genetic improvement of crops that are not amenable to conventional breeding, such as those that are vegetatively propagated. In IITA, transgenic te...


Tripathi, L.[Transgenics in crop improvement research at IITA]Transgenics in crop improvement research at IITA

Yams are staples in West Africa. They are propagated from tubers in an informal seed system. This encourages a build-up of diseases, and necessitates the rapid development of a formal seed system where certified seeds are functional. Although few reports exist on the use of meristem culture to ge...


Balogun, M.Maroya, N.Augusto, J.Ajayi, A.Kumar, P.L.Aighewi, B.A.Asiedu, Robert[Relative efficiency of positive selection and tissue culture for generating pathogen-free planting materials of yam (Dioscorea spp.)]Relative efficiency of positive selection and tissue culture for generating pathogen-free planting materials of yam (Dioscorea spp.)

Water yam (Dioscorea alata L.) is the most widely cultivated yam species globally. The major limitation to the profitable and sustainable production of D. alata is its susceptibility to anthracnose disease. The availability of resistant varieties could potentially form the cornerstone of an integ...


Abang, Mathew M.Winter, S.Mignouna, H.D.Green, K.R.Asiedu, Robert[Molecular taxonomic, epidemiological and population genetic approaches to understanding yam anthracnose disease]Molecular taxonomic, epidemiological and population genetic approaches to understanding yam anthracnose disease

Yam production is constrained by scarcity of clean seed, pests, diseases and low soil fertility in the informal seed system, which is still operational, causing up to 90% yield losses. Although meristem culture can be effective for producing healthy seed yam, its use is limited by slow rate of re...


Balogun, M.Maroya, N.Asiedu, Robert[Status and prospects for improving yam seed systems using temporary immersion bioreactors]Status and prospects for improving yam seed systems using temporary immersion bioreactors

Yam (Dioscorea spp.), a traditional crop in Kenya has not undergone improvement and little has been done to understand its genetic background. The taxonomy and phylogeny of the local landraces has not been fully studied. The main cultivated species is Dioscorea minutiflora Engl. Others found with...


Muthamia, Z.K.Nyende, A.B.Mamati, E.G.Ferguson, M.Wasilwa, J.[Determination of ploidy among yam (Dioscorea spp.) landraces in Kenya by flow cytometry]Determination of ploidy among yam (Dioscorea spp.) landraces in Kenya by flow cytometry

The genetic diversity of 219 accessions of Guinea yam germplasm from Benin, Congo, Côte d’ Ivoire,Equatorial Guinea, Gabon, Ghana, Nigeria, Sierra Leone and Togo was accessed using 15 microsatelliteloci. High diversity of 0.677 was found among the accessions. An allelic average of 8.06 andpolymor...


Obidiegwu, J.E.Kolesnikova-Allen, M.Ene-Obong, E.E.Muoneke, C.O.Asiedu, Robert[SSR markers reveal diversity in Guinea yam (Dioscorea cayenensis/D. rotundata) core set]SSR markers reveal diversity in Guinea yam (Dioscorea cayenensis/D. rotundata) core set
Ortiz, R.Vries, J. deToenniessen, G.[Securing the harvest: biotechnology, breeding, and seed systems for African crops]Securing the harvest: biotechnology, breeding, and seed systems for African crops

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