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dc.contributor.authorEgesi, Chiedozie N.en_US
dc.contributor.authorOnyeka, T.J.en_US
dc.contributor.authorAsiedu, Roberten_US
dc.date.accessioned2018-01-15T10:50:53Zen_US
dc.date.available2018-01-15T10:50:53Zen_US
dc.date.issued2009en_US
dc.identifier.citationEgesi, 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.en_US
dc.identifier.issn1991-637Xen_US
dc.identifier.urihttps://hdl.handle.net/10568/90215en_US
dc.descriptionOpen Access Journalen_US
dc.description.abstractYam 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.en_US
dc.format.extent113-118en_US
dc.language.isoenen_US
dc.sourceAfrican Journal of Agricultural Researchen_US
dc.subjectCOLLETOTRICHUM GLOEOSPORIOIDESen_US
dc.subjectGENOTYPE × ENVIRONMENT INTERACTIONen_US
dc.subjectSTABLE RESISTANCEen_US
dc.subjectWATER YAMen_US
dc.subjectYAM ANTHRACNOSEen_US
dc.subjectYAM MOSAICVIRUSen_US
dc.titleEnvironmental stability of resistance to anthracnose and virus diseases of water yam (Dioscorea alata)en_US
dc.description.versionPeer Reviewen_US
dc.typeJournal Articleen_US
cg.authorship.typesCGIAR and developing country instituteen_US
cg.subject.iitaYAMen_US
cg.subject.iitaGENETIC IMPROVEMENTen_US
cg.subject.iitaPLANT DISEASESen_US
cg.subject.iitaDISEASE CONTROLen_US
cg.identifier.statusOpen Accessen_US
cg.contributor.affiliationNational Root Crops Research Institute, Nigeriaen_US
cg.contributor.affiliationInternational Institute of Tropical Agricultureen_US
cg.fulltextstatusFormally Publisheden_US
cg.coverage.regionAFRICAen_US
cg.coverage.regionWEST AFRICAen_US
cg.coverage.countryNIGERIAen_US


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