In order to determine yield stability of 23 bread wheat genotypes and two commercial cultivars as
check, an experiment was conducted based on a randomized complete block design with three
replications in the experimental field of faculty of Agriculture, Razi University Kermanshah (Iran),
during three cropping seasons (2015-2018). The results of combined ANOVA showed that the effect
of environment, genotype and genotype × environment interactions on grain yield were significant
(P<0.01). Stability was evaluated using environmental variance statistics, coefficient of variation,
Wrick´s ecovalence, Shukla’s stability variance, Regression slope, deviation from regression slope,
Plaisted and Peterson method and AMMI model. Variance analysis of additive main effects and
multiplicative (AMMI) showed that three IPCAs were significant at 1% probability level. The first
three principal components justified a round 85.7% of the sum of square of the interaction. Also,
AMMI stability value (ASV) was used for simultaneously using information obtained from two
significant components of AMMI. According to ASV index, genotypes Pishgam, Wc-4958 and
Pishtaaz had the lowest ASV value and were known as the most stable genotypes. Genotypes Wc-
4987, Wc-47615, Wc-47399 and Wc-47638 had the highest ASV value and distance from the center
of Bi-plot. Therefore, Pishtaaz is one of the most stable genotypes due to having the first rank in terms
of studied parameters as well as proper bakery properties and desirable drought resistance. In general,
regarding to the climate change in the country, especially in the rainfed conditions and based on the
above statistics and the biplots derived from AMMI analysis, the Wc-4958 line, with pishtaaz and
Pishgam cultivars as stable and adaptable genotypes, are suggested to rainfed conditions on the studied
area.