Investigating the yield stability of barley promising lines in temperate regions of Khorasan Razavi province

The objective of this study was to evaluate genotypes (G), environments (E) and to analyze genotype by environment (GE) interactions on the seed yield of 20 barley promising lines by the additive main effects and multiplicative interaction(AMMI) model. The trials were conducted at two research stations (Neyshabur and Torogh Mashhad) for two successive years (2015-2017). The result’ s of AMMI analysis for seed yield indicated that the Genotype main effects, environment, and GE interactions as well as two first interaction principal components (IPCA1-2) were significant. AMMI biplot was able to distinguish stable genotypes and environments with high and low genotype discrimination ability. The genotypes 1 and 10 with higher mean yield than total mean were to be most stable genotypes, while the genotype 19 and 2 with the highest contribution to GE interaction, were to be the most instable. The result of recommended genotypes based on AMMI analysis showed that the genotypes 18, 9 and 1 were highly adapted to Mashhad and genotype 20 was adapted to Neishabour environments during this study.