Genotype x environment interaction in water yam (Dioscorea alata) yield trials in five yamgrowing sites in Nigeria

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dc.creatorEgesi, Chiedozie N.
dc.creatorOgunyemi, S.
dc.creatorAsiedu, Robert
dc.date2005
dc.date2018-03-23T06:48:46Z
dc.date2018-03-23T06:48:46Z
dc.date.accessioned2026-06-27T16:00:20Z
dc.descriptionA randomised complete block experiment was conducted in the 1998 and 1999 cropping seasons in five major yam growing areas in the yam belt of Nigeria to evaluate the performance and yield stability of six genotypes of water yarn (Dioscorea alata L). Location, genotype and their interaction effects, significantly (P<0.001) affected fresh tuber yields. The best location for production, based on the general performance of genotypes, was the southern Guinea savanna, followed by the forest-savanna transition and then the humid forest ecology. Genotypes with good potential for multiple-tubering were identified. With respect to stability, two genotypes were identified to have given the most stable yields across all the five locations. The overall yields of these stable genotypes were above the mean yields for all the genotypes. The need for practical integration of yield and stability of performance is emphasized, and their benefits to breeders and farmers in selecting the best environmental treatments for good performance of crop varieties is highlighted.
dc.identifierhttps://hdl.handle.net/10568/91791
dc.identifier.urihttp://hdl.handle.net/123456789/119798
dc.languageen
dc.rightsLimited Access
dc.sourceEgesi, C.N., Ogunyemi, S. & Asiedu, R. (2005). Genotype x environment interaction in water yam (Dioscorea alata) yield trials in five yam-growing sites in Nigeria. Journal of Genetics and Breeding, 59, 81-88.
dc.subjectdioscorea alata
dc.subjectenvironment
dc.subjectgenotypes
dc.subjectlocation
dc.subjectstability
dc.subjectwater yam
dc.titleGenotype x environment interaction in water yam (Dioscorea alata) yield trials in five yamgrowing sites in Nigeria
dc.typeJournal Article

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Instituto Internacional de Agricultura Tropical (IITA)