Study of Grain Yield Stability of Durum Wheat Genotypes using AMMI

In order to determine yield stability of 20 durum wheat genotypes, a trial was carried as randomized complete block design with four replications in four years during 20092014 in Sarab-Changae station of Khorramabad, Iran. Analysis of combine variance showed that environment, genotype and genotype × environment interaction were significant at 1% probability level. Variance analysis of additive main effects and multiplicative (AMMI) showed that two IPCAs were significant at 1% probability level. Also, AMMI stability value (ASV) was used for simultaneously using information obtained from two significant components of AMMI. According to ASV index, genotypes G2, G12, G14 and G19 had the lowest ASV value and were known as the most stable genotypes. Genotype G9 had the highest ASV value and distance from the center of Bi-plot. Therefore, it was known as stable genotype. Also, Genotype G9 had the highest grain yield. Using cluster analysis of genotypes based on ASV, genotypes divided to three groups that genotypes of each group were similar as stable.