Evaluation of genotype-environment interaction and grain yield stability of rice genotypes under normal and drought stress conditions in two years

Abstract

In order to determine interactive effect between genotype and environment and also to select the most stable genotypes with high yield especially under drought conditions, thirty genotypes were compared. A randomized complete blocks design was used under normal irrigation and drought stress conditions in two years. The simple analysis of variance for grain yield in each environment and each year showed the high significant differences among the genotypes. From combined analysis of variance, significant differences among the genotypes (genotype×environment, genotype×year, year×environment and genotype×year×environment) were observed. Our data revealed that there were significant differences among genotypes for all stability parameters. Moreover, the three improved genotypes including Sepidrood, Nemat and Kadous were known as thexd stable genotypes with the highest yield in both conditions during two years and can be recommended for drought- prone environments.