2022, Vol. 5, Issue 2, Part C

author(s)
Dereje Abera, Tashome Gutu and Biru Alemu

abstract
Twelve small red common bean (Phaseolus vulgaris L.) genotypes were evaluated for grain yield and yield stability at seven environments of Haro Sabu Agricultural Research Center in 2015-2017. The objectives of the study were to identify and select high-yielding and stable genotypes. Randomized Complete Block Design (RCBD) with three replications, consisting of a net plot area of 1.6mx3m was used. Based on analysis of variance, all observed traits except for days to maturity, branches/ plant, and seed/ pod showed significant differences in genotypes. The main effect of environment exerted a significant effect on all traits. The interaction effect of genotype x environment significantly influenced all traits except for plant height, branch/plant, and seed/pod. Moreover, the results of this study indicated the existence of genetic variation among genotypes for most of the observed traits. The stability of genotypes was confirmed by AMMI stability value (ASV), Genotype Selection Index (GSI), and GGE biplot. From the total variation; 17.48%, 43.68%, 17.31%, 3.13%, and 18.39% were obtained due to genotype, environment, G×E, block, and error, respectively. The higher mean of 2.01 tons/ha (G3), 1.99 tons/ha (G2), 1.94 tons/ha (G1), and 1.94 tons/ha (G7) were recorded for grain yield. The grain yield advantage of 24.07(G3), 22.84 (G2), 19.75 (G1), and 19.75 (G7) were estimated over the standard check, SER 119 which had a mean of 1.62 tons/ha. ASV, GSI, and GGE Biplot confirmed that G3, G2, G1, and G7 were high yielders, more adapted, stable, and suggested for release in West and Kellem Wallaga Zones.