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Multilocational trials were conducted in several agroecological zones in West Africa to assess the magnitude of genotype x environment (G x E) interaction and to identify stable varieties which could be used in breeding programs in the region. The reaction of the varieties to major cassava diseas...


Otoo, J.Dixon, A.Asiedu, RobertOkeke, J.Maroya, N.Tougnon, K.Okoli, O.Tetteh, J.Hahn, S.[Genotype x environment interaction studies with cassava]Genotype x environment interaction studies with cassava

The overall goal of the five year project “Yam Improvement for Income and Food Security in West Africa” (YIIFSWA) funded by the Bill and Melinda Gates Foundation and led by the International Institute of Tropical Agriculture, Ibadan, Nigeria was to: (a) increase yam productivity by 40% for 2,00,0...


Maroya, N.Asiedu, RobertMignouna, Djana B.López Montes, A.Kleih, U.K.Phillips, D.Ndiame, F.Ikeorgu, J.Otoo, E.[Yam improvement for income and food security in west Africa: effectiveness of a multidisciplinary and multiinstitutional teamwork]Yam improvement for income and food security in west Africa: effectiveness of a multidisciplinary and multiinstitutional teamwork

White Guinea yam ( Dioscorea rotundata Poir.) is an important staple to millions of people in West Africa. Obtaining good quality planting material for yam cultivation is a major challenge. Multiplication ratios are low, and seed tubers are prone to contamination with pests and pathogens in the t...


Aighewi, B.A.Asiedu, RobertMaroya, N.Balogun, M.[Improved propagation methods to raise the productivity of yam (Dioscorea rotundata Poir.)]Improved propagation methods to raise the productivity of yam (Dioscorea rotundata Poir.)

Twenty-one yellow-fleshed cassava genotypes were evaluated over two years in five major cassava growing agroecological zones in Nigeria. The trials were established in a randomized complete block design with four replications to assess genotype performance and Genotype × Environment interaction f...


Maroya, N.Kulakow, P.A.Dixon, A.Maziya-Dixon, B.B.[Genotype X Environment interaction of mosaic disease, root yields and total carotene concentration of yellowfleshed cassava in Nigeria]Genotype X Environment interaction of mosaic disease, root yields and total carotene concentration of yellowfleshed cassava in Nigeria

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.)

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

Cassava is an important starchy root crop and a major staple for more than 70 million people in Nigeria. New yellow-fleshed genotypes are being developed to combat vitamin A deficiency. Trials of 18 yellow-fleshed genotypes and two officially released white-fleshed clones, used as checks for 2008...


Maroya, N.Kulakow, P.A.Dixon, A.Maziya-Dixon, B.B.Bakare, M.A.[Genotype X Environment interaction of carotene content of yellowfleshed cassava genotypes in Nigeria]Genotype X Environment interaction of carotene content of yellowfleshed cassava genotypes in Nigeria

Aims: To study yam propagation and seed yam tuber production in aeroponics system.Study Design: The experiment was conducted in a randomized complete block designand treatments were replicated three times.Place of Study: This experiment was carried out at the International Institute of TropicalAg...


Maroya, N.Balogun, M.Asiedu, RobertAighewi, B.A.Kumar, P.L.Augusto, J.[Yam propagation using Aeroponics technology]Yam propagation using Aeroponics technology

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