Study of grain yield stability and genotype - environment interaction in 20 bread wheat lines in warm and dry areas of south of Iran

In order to determine yield stability and evaluation of genotype × environment interaction, 20 spring bread wheat promising lines and varieties were studied in arandomized complete block design with three replications in four warm and drystations (Ahwaz, Dezful, Darab, & khorramabad) during 2002-2004. Chamrancultivar was a check in two years trial. The results revealed that the grain yield ofgenotypes were different in studied environments. Combined analysis resultsconfirmed that the effects of location and year, and the interaction of location ×year×genotype were significant statistically in 5% and 1% levels respectively.Stability analysis for grain yield of genotypes based on Eberhart and Ressel linearregression coefficient, Wrick’s ecovalence, Shukla’s stability variance, Index forsimultaneous selection, non-parametric statistic method (mean rank of yield,standard deviation of rank of yield, and yield index ratio), AMMI and SHMMmodels, revealed that the genotypes No. 1, 7 and 2 were the most stable genotypes.