6 (2) 2022, APRIL 2022
Pages: 60-72
Grain yield stability analysis for food-type common bean (Phaseolus vulgaris L.) genotypes in Southern Oromia of Ethiopia
Author: T. A. Beyene, D. S. Legesse, C. G. Molu, R. N. Dinagde
Category: Plant breeding
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Abstract:
Twelve common bean genotypes including the standard and local checks were evaluated at eight locations during 2019-20 and 2020-21, to identify high yielding and stable or specifically performed genotypes for target environments and to identify mega-environments to inform future testing strategies. The genotypes were arranged in Randomized Complete Block Design and replicated three times. A combined analysis of variance detected significant (p< 0.01) variation among genotypes, environment and genotype-by-environment interactions for grain yield and other agronomic traits. GGE biplot analysis identified genotypes viz., NSEA515-11-1 and NSEA515-11-34 as widely adapted genotypes with greater grain yield of 2.90 tons/ha and 2.823 tons/ha. So that genotype NSEA515-11-1 the most stable and high yielder across all locations and recommended to be verified for possible release. Overall, Gobicha was the most suitable environment for discriminating among genotypes and for being a representative test environment. Three mega-environments (MGE) were identified; where midland and lowland sites fell in the same mega-environments.
Keywords: GGE biplot, AMMI, Phaseolus vulgaris, environment, yield
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