GGE Bi Plot Analysis of Genotype X Environment Interaction and Grain Yield Stability of Bread Wheat (Triticum aestivum L.) Genotypes in Ethiopia

Abstract

There is limitation of information on G x EI of bread wheat genotypes in Ethiopia. The study cried out with objectives to estimate Genotype x Environment interaction and stability of bread wheat genotypes in Ethiopia. Thirty Bread wheat genotypes were evaluated by Alpha lattice design using three replications at eight locations in Ethiopia. The mean grain yield of genotypes across environments was 4.53 ton ha^-1. Bread wheat grain yield was significantly affected by the E, G and G x E interaction. Environment, G x E interaction and genotype explained 45.59%, 25.37% and 2.59% of the total (G + E + GEI) variation respectively. Genotype ETBW71942 (3), ETBW7038 (9), ETBW8511 (1) and ETBW8512 (14) were considered specifically adapted. Considering simultaneously yield and stability, Genotype ETBW7871 (15), ETBW7058 (11), ETBW8513 (16) and ETBW7101 (25) showed the best performances.

Keywords: genotype; environment; genotype x environment interaction; Stability.