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For a mixture of reasons certain tropical crops which are important as primary or secondary food staples are relatively underresearched. The modem tools of molecular and cellular biotechnology offer the opportunity not only to make substantial gains in our knowledge of these crops, but also to ov...


Asiedu, RobertFatokun, C.A.Mignouna, J.H.Ng, S.Y.C.Quin, F.M.Vuylsteke, D.R.[Underresearched tropical food crops: cowpea, banana and plantain, and yams]Underresearched tropical food crops: cowpea, banana and plantain, and yams

Growers of yam demarcate certain areas as being suitable for yam culture and the factors responsible are suspected to relate to both prevailing soil and aerial environments. No empirical evidence to substantiate this suggestions has been documented. Two popular cultivars were selected from each o...


Asadu, C.Ezumah, H.C.Nweke, F.Akammigbo, F.O.[The performance of six cultivars of white yam derived from three sources and evaluated across three zones in southern Nigeria]The performance of six cultivars of white yam derived from three sources and evaluated across three zones in southern Nigeria

Assessment of new yam varieties in Côte d'Ivoire : results of three experiments years with improved genotypes by IITA The most important food crop in the Ivory Coast, yam, is cultivated in a traditional system with low productivity. In order to suffice the needs of the growing population the intr...


Ettien, J.B.Tschannen, A.B.[Evaluation de nouvelles varieties digname en Cote dIvoire: bilan de trois annees dexperience avec des genotypes ameliores par lIITA]Evaluation de nouvelles varieties digname en Cote dIvoire: bilan de trois annees dexperience avec des genotypes ameliores par lIITA

Progress in pest management on cassava (Manihot esculenta) in Africa has witnessed remarkable achievements over recent years in the management of African cassava mosaic virus, cassava mealy bug, cassava green mite and overall germplasm improvement for yield improvements. From the scant informatio...


Coyne, D.Mudiope, J.Hugues, B.[Advances in yam and cassava nematology research at IITA]Advances in yam and cassava nematology research at IITA

A yam potyvirus was isolated from Dioscorea alata samples collected in Nigeria. The virus was not transmissible mechanically but was transmitted by Aphis craccivora to four cowpea cultivars (Ife Brown, IT84S‐2114, IT82E‐10 and TVu2657), and from which it could be mechanically transmitted between ...


Odu, B.O.Hughes, J.D.Shoyinka, S.A.Dongo, L.N.[Isolation, characterisation and identification of a potyvirus from Dioscorea alata L. (water yam) in Nigeria]Isolation, characterisation and identification of a potyvirus from Dioscorea alata L. (water yam) in Nigeria

Theberge, R.L.Caveness, F.E.Herren, H.R.Lema, K.Neuenschwander, P.Yaninek, John S.[Common African pests and diseases of cassava, yam, sweet potato and cocoyam]Common African pests and diseases of cassava, yam, sweet potato and cocoyam

Progress is being made at the International Institute for Tropical Agriculture to develop molecular tools for marker-assisted selection that would complement and expedite conventional breeding approaches for genetic improvement of yams (Dioscorea spp.). F1 mapp...


Sartie, A.M.Asiedu, Robert[Development of mapping populations for genetic analysis in yams (Dioscorea rotundata and D. alata)]Development of mapping populations for genetic analysis in yams (Dioscorea rotundata and D. alata)

Experiments were carried out in the greenhouse and field of the Department of Crop Protection andEnvironmental Biology, University of Ibadan and the International Institute of Tropical Agriculture (IITA)to screen crops for resistance/susceptibility to the yam nematode Scutellonema bradys. The sev...


Oluwatayo, J.IAsiedu, RobertAdesiyan, S.O.[Screening plant materials for resistance to the yam nematode (Scutellonema bradys)]Screening plant materials for resistance to the yam nematode (Scutellonema bradys)

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