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

In this study, 21 cultivated oat genotypes were studied in a randomized complete block design with three replications in 13 environments (combination of year and place) in the years 2008 to 2015. The results of combined analysis of variance indicated that genotypes significantly different (P≤0.01) in term of grain yield. Moreover, the environment and genotype × environment effects were highly significant. Accordingly, AMMI model was used to investigate the interaction and identify stable genotypes. According to the numerical values of the components of the genotype × environment interaction and their ranks it could be concluded that Genotypes 6, 8, 20, 12, 18, 21 and 1 showed greater yield stability than other genotypes. Based on Ammi stability value (ASV) Genotypes 20, 6, 8, 1, 21, 18, 9 and 3 were determined as stable genotypes. To recognize genotypes that are stable and have higher grain yield simultaneously, AMMI1 charts were used. The result showed that Genotypes 21 and 6 are more stable and have higher grain yield. Thus, it could be suggested that these genotypes have potential to introduce as new cultivars or use in the future breeding programs.