The presence of significant genotype x environment interaction (GEI) has effect on the stability of genotypes across environments. Sixteen Andean red common bean genotypes were evaluated at six sites using triple lattice design in 2017 cropping season. The objective of the study was to evaluate seed yield stability of the genotypes using Additive Main Effects and Multiplicative Interaction (AMMI) and Genotype plus Genotype by Environment (GGE) bi-plot analyses. The AMMI ANOVA showed that the magnitude of G, E and GEI was 3.8%, 80.9% and 11.1% respectively of the total variation. The genotypes Red kidney, Melkadima and DAB 478 were identified as stable genotypes using AMMI bi-plot analysis. Based on GGE bi plot analysis, genotypes DAB 544, Red kidney, DAB 478, DAB 532 and DAB 481 were adapted to all environments. Three mega-environments were identified using GGE bi-plot analysis; namely high potential and discriminating environments (Melkassa), medium potential environments (Arsi Negele and Alem Tena) and low potential and undiscriminating environments (Areka, Gofa and Kokate). Therefore, Genotypes Red kidney and DAB 478 were the most stable according to the two stability analysis models and can be recommended for production in southern region and central Rift valley areas of Ethiopia.
Keywords: AMMI; common bean; GGE bi-plot; GEI; genotypes; yield