Regression and additive main effects and multiple interactions (Ammi) in common bean (Phaseolus Vulgaris L.) genotypes

Abstract

Common bean (Phaseolus vulgaris L.) genotypes were tested over locations (Bako, Boshe and Gute) and years (2004 – 2005) with the objective of identifying high yielding, stable and adaptable varieties for western parts of Ethiopia. Regression and AMMI analysis were computed to identify stable genotypes across multi-environments (location-year combinations). Analysis of variance revealed highly significant difference among environment, genotype and genotype x environment (G x E) interactions, implying that genotypes suitable for specific conditions can be selected. Evidently, MD-23-4, A-802 and LM-93204324 were found to be stable and adapted to wide environments. Genotypes, VAX-2 and Angar were the top yielders but were sensitive to changed environmental conditions, suggesting that these genotypes produce higher yield under good management and favorable environmental conditions. Therefore, we recommend MD-23-4, A-802 and LM-93204324 for wide adaptation and VAX-2 and Angar for specific adaptation. 

Key words/phrases: AMMI, Genotype x Environment, Phaseolus vulgaris, Regression, Stable

Ethiop. J. Biol. Sci., 7(1): 45-53, 2008