Environmentally Stable Large Red Common Bean (Phaseolus vulgaris L.) Genotypes for Production in Different Bean Growing Regions of Ethiopia

Abstract

This study examines the yield stability and adaptability of large red bean genotypes across various bean-growing regions in Ethiopia. Sixteen genotypes were tested in fourteen different environments over four years (2015-2018) using a triple lattice design. Grain yield data were analyzed using several methods: Additive Main Effect and Multiplicative Interaction (AMMI), Genotype Main Effects plus Genotype × Environment Interaction (GGE), AMMI Stability Value (ASV), and Yield Stability Index (YSI). The results showed that grain yields were significantly influenced by the environment (77.03%), genotype (3.18%), and their interaction (10.26%) (P ≤ 0.01). GGE biplot analysis identified four mega-environments, with MS16 (MEISO in 2016) being the most discriminative and representative site. Genotypes G4, G14, G15, and G9 were the most stable and high-yielding according to GGE biplot, while G12, G13, and G8 were stable but low-yielding based on ASV analysis. YSI identified G15, G10, G13, G14, and G9 as high-yielding and stable. Overall, GGE biplot stability statistics and YSI highlighted G9 (DAB 544) and G14 (DAB 481) as superior genotypes, suitable for commercial cultivation in Ethiopia.