Studies on Genotype × Environment Interaction and Stability for Seed Yield in Common Bean (Phaseolus vulgaris L.)

Twelve promising genotypes of common bean (Phaseolus vulgaris L.) and a standard check were evaluated at three locations for seed yield. Significant differences were observed among the genotypes, G x E interaction as well as individual environmental effects revealed the presence of variability for the trait under investigation. Significant variance due to G x E (linear) against pooled deviation indicating that the yield performance of the genotypes could be predicated with greater precision across environments. Genotype SKUA-R-91 possessed high mean values for seed yield across the environments and its regression co-efficient (bi) approaching unity with least deviation from regression co-efficient (s²di). This particular genotype can be utilized in hybridization for isolating high yielding and stable segregants. The environmental conditions at E₁ were the best for the expression of seed yield.