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Yam mosaic virus (YMV), genus Potyvirus; family Potyviridae is the most important virus infecting Dioscorea spp. in the tropics. It induces a variety of symptoms ranging from mild mosaic on leaves of infected plants to stunted growth. Field and laboratory studies were conducted in Nigeria to iden...


Odu, B.O.Asiedu, RobertHughes, J.Shoyinka, S.A.Oladiran, O.A.[Evaluation of resistance to yam mosaic virus (YMV), genus Potyvirus in white yam (Dioscorea rotundata Poir.)]Evaluation of resistance to yam mosaic virus (YMV), genus Potyvirus in white yam (Dioscorea rotundata Poir.)

Nineteen white yam (Dioscorea rotundata Poir.) genotypes were grown in four agroecological zones in Nigeria for 2 years to study their responses to yam virus diseases, and to investigate the influence of genotype × environment (G × E) interactions on their reactions to virus infection, using the ...


Odu, B.O.Asiedu, RobertShoyinka, S.A.Hughes, J.D.[Reaction of white guinea yam (Dioscorea rotundata Poir.) genotypes to virus diseases in four agroecological zones in Nigeria]Reaction of white guinea yam (Dioscorea rotundata Poir.) genotypes to virus diseases in four agroecological zones in Nigeria

Studies were made to identify sources of resistance to yam viruses in Dioscorea alata. Forty genotypes of D. alata were evaluated in both the field and in the screenhouse for reactions to the yam viruses: Yam mosaic virus (YMV), genus Potyvirus; Dioscorea alata virus (DAV), genus Potyvirus; Cucum...


Odu, B.O.Asiedu, RobertShoyinka, S.A.Hughes, J.A.[Screening of water yam (Dioscorea alata L.) genotypes for reactions to viruses in Nigeria]Screening of water yam (Dioscorea alata L.) genotypes for reactions to viruses in Nigeria

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

Enzyme-linked immunosorbent assay (ELISA) was used to detectviruses in649 cowpea leafsamples collectedfrom115 fields during a 3-year survey carried out from 1991 to 1993 throughout all agroecological zones in Nigeria. Six viruses, cowpea aphid-borne mosaic potyvirus (CAMV), blackeye cowpea mosaic...


Shoyinka, S.A.Thottappilly, G.Adebayo, G.G.Anno-Nyako, F.O.[Survey on cowpea virus incidence and distribution in Nigeria]Survey on cowpea virus incidence and distribution in Nigeria

The responses of 24 white yam (Dioscorea rotundata) cultivars to mechanical and vector transmission with each of three viruses infecting yams were assessed through enzyme-linked immunosorbent assay (ELISA) and symptom development. The viruses were Dioscorea alata virus (DAV), genus Potyvirus; Dio...


Odu, B.O.Hughes, J.D.A.Asiedu, RobertNg, N.Q.Shoyinka, S.A.Oladiran, O.A.[Responses of white yam (Dioscorea rotundata) cultivars to inoculation with three viruses]Responses of white yam (Dioscorea rotundata) cultivars to inoculation with three viruses

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