Analysis of Yield Stability of some White Bean (Phaseolus vulgaris L.) Genotypes using AMMI Method

Genotype × environment interaction effects have important roll in superior genotypes selection. To study genotype, environment and genotype × environment effects on seed yield, twelve white bean genotypes were evaluated in a randomized complete block design with three replications at four locations (Broujerd, Zanjan, Khomein and East Azarbaijan)for two years (2012-2014). Results of combined variance analysis showed significance of genotype, environment and genotype × environment effects on seed yield. The highest and lowest seed yield of genotypes were obtained in Broujerd (4335 kgha-1) and Khomein (1354.2 kgha-1) stations, respectively. Analysis of AMMI variance showed that six IPCAs were significant and seventh IPCA was considered as noise. Genotype × environment interaction effect was more important than main effect of genotype. First two main components explained 71% of total yield variance. According to values of first significant main component (PCA1), AMMI stability value (ASV) and genotype stability index (GSI), genotype 11805/DANESHKADEHwas known as the most stable genotype with high yield.