Yield Stability and Genotype X Environment Interaction of Early Set Soybean Genotypes in Ethiopia

Abstract

The goal was to evaluate the genotype by environment interaction for grain yield productivity and identify genotypes stability in Ethiopia. Eighteen genotypes were assessed across 10 environments using a randomized complete block design under 3 replications. Adaptability and phenotypic stability of the genotypes were assessed using Additive main effects and multiplicative interaction (AMMI) and Genotype main effect and genotype x environment interaction (GGE). AMMI analyses elucidated highly significant (P < 0.001) genotype and environmental effects, as well as genotype by environment interaction regarding grain yield. In the exploration of variance, 78.8 % of the grain yield dissimilarity was demonstrated by the environment, 2.94 % of variations by genotypes, and 19.02 % by genotype by environment interaction. GGE-bi plot models illustrated that the ten environments used for this investigation belonged to three mega-environments. According to AMMI and the GGE results, G12, G10, G2, and G7 were low productive and stable genotypes, G14(TGx 1935-10E), and G16 (PC-4) high productive and unstable genotypes whereas G1, G8, G17(TGx 1988-5E) and G15 (TGx 1989-40F) were high yielder and stable genotypes. Therefore, in regard to most productivity in grain yield and relative stability, we recommended G17 (TGx 1988-5E), and G15 (TGx 1989-40F) for the test environments.