Study on Genotype × Environment Interactions for Grain Yield of Oats Genotypes using AMMI Mode

In order to evaluate the grain yield stability of 21 oat genotypes, 13 experiments carried out during 6 years (from 2009 to 2015) and across 4 environments in the west of Iran. Five of them were carried out by the author of this thesis during 2013-2015 using a completely randomized block design with three replications under three conditions including irrigated, drought stress and rainfed at the Research Farm of the Campus of Agriculture and Natural Resurces, Razi University, Kermanshah. Based on the results of analysis of variance for grain yield, high significant differences were detected for genotype, environments and genotype × environment interaction. Significance interaction of genotype × environment showed that the response of genotypes to the environment were different. Significance of genotype × environment interaction allowed us to perform genotype × environment interaction analysis to find stable and high yielding genotypes across experiments. Accordingly, to investigate the interaction and identify stable genotypes, AMMI model was used. According to the numerical values ​​of the components of the interaction of genotype and their ranks it can be concluded that genotypes 6, 8, 20, 12, 18, 21 and 1 have been greater yield stability than other genotypes and also according to Ammi stability value (ASV) genotypes respectively 20, 6, 8, 1, 21, 18, 9 and 3 were determined as stable genotypes. To take account of sustainability and yield AMMI1 charts were used simultaneously. In addition to the sustainability performance of stable genotypes, genotypes 21 and 6 had higher grain yield. Thus, we can figure this genotypes to introduce a new or used in breeding programs proposes.