GGE Biplot Analysis of Genotype x Environment Interaction and Bean Yield Stability of Arabica Coffee (<i>Coffee arabica</i> L.) Genotypes in Southwestern Ethiopia

Coffee is the main Ethiopia’s most important agricultural export crop, which providing about 25-30% of foreign exchange earnings. The estimation stability performance cultivars becomes to detect consistently performing and high yielding genotypes. Eleven Arabica coffee genotypes were evaluated in southwestern part Ethiopia across four locations for two consecutive years (2014/15 - 2015/16). objective study was estimate presence interaction between environments; its bean yield. experimental design Randomized Complete Block Design (RCBD) replicated twice each testing location. Genotypes by Genotype effect genotype x environment (GGE) biplot. combined analysis variance indicated that genotypes, environments GEI showed highly significant (p<0.01). Total variation explained 41.63% environments, 9.31% 32.32% (GEI). This obviously shows total minimal when compare GEI. GGE biplot grouped into clusters with five being winners different group environments. Top namely; L52/2001 L55/2001; E6 (Jimma 2015/16) identified as an ideal environment, respectively. In this study, stable suitable similarity based on yield identified.