Abstract

Fifteen common bean genotypes were tested at four locations with two management regimes of lime treated and lime untreated acidic soils. The experiment was laid out in split plot design with three replications during 2016/17 cropping season. The combined analysis of variance over environments showed significant differences among environments, genotypes, genotype x environment interaction (GEI), management, genotype by management interaction (G x M) and genotype by environment by management interaction (G x E x M) on seed yield. Analysis of variance for seed yield from AMMI model indicated that contribution of the IPCA 1 and IPCA 2 accounted for 53.37 and 25.04%, respectively for lime treated soils and 72.89 and 18.30% respectively for lime untreated soils of the observed variation due to GEI. The result indicated environment contributed much to the observed variations suggesting the need to test common bean genotypes at diverse environments. Two genotypes, ALB 212 (1.65 t/ha) and BFS 39 (1.63 t/ha) had first and second highest yield, identified as responsive to both environments but more to favorable environments suggesting the need for further test to develop as varieties. It could be possible to recommend genotypes ALB 179, ALB 207, ALB 209, BFS 35, BFS 39 and ALB 212 to be tested as National Variety trial for all environments with both management measures as they have wider adaptability.

Key words: Additive main effect and multiplicative interaction (AMMI), common bean, genotype x environment interaction (GEI), split plot.