Environmental stability of resistance to anthracnose and virus diseases of water yam (Dioscorea alata)

Vista sencilla de ítem
dc.creatorEgesi, Chiedozie N.
dc.creatorOnyeka, T.J.
dc.creatorAsiedu, Robert
dc.date2009
dc.date2018-01-15T10:50:53Z
dc.date2018-01-15T10:50:53Z
dc.date.accessioned2026-06-27T15:55:47Z
dc.descriptionYam anthracnose and virus diseases are the most important biotic constraints affecting yam production in the world. Six Dioscorea alata genotypes were evaluated for their reaction to these diseases in four distinct agro-ecological zones in Nigeria for two years. Data obtained were subjected to linear mixed modelling for ordinal data and site regression model. Environment (E), genotype (G) and G × E interactions contributed 26, 48 and 25.9% respectively to the total variation in severity of anthracnose disease symptoms indicating the confounding influence of the environment on evaluations in different locations. In the virus disease assessment, environment, genotype and their interaction contributed 5.67, 75.4 and 18.9% respectively indicating that host plant resistance is the ideal means of controlling the disease. Genotypes TDa 291 and TDa 297 showed stable resistance to both diseases across environments and would be valuable in breeding programs. Two sites, Ubiaja and Abuja were identified as very good for germplasm evaluation for reaction to the two diseases due to their high discriminatory abilities.
dc.identifierhttps://hdl.handle.net/10568/90215
dc.identifier.urihttp://hdl.handle.net/123456789/117729
dc.languageen
dc.rightsOpen Access
dc.sourceEgesi, C.N., Onyeka, T.J. & Asiedu, R. (2009). Environmental stability of resistance to anthracnose and virus diseases of water yam (Dioscorea alata). African Journal of Agricultural Research, 4(2), 113-118.
dc.subjectcolletotrichum gloeosporioides
dc.subjectgenotype × environment interaction
dc.subjectstable resistance
dc.subjectwater yam
dc.subjectyam anthracnose
dc.subjectyam mosaicvirus
dc.titleEnvironmental stability of resistance to anthracnose and virus diseases of water yam (Dioscorea alata)
dc.typeJournal Article

Archivos

Colecciones

Instituto Internacional de Agricultura Tropical (IITA)