GGE Bi-Plot Analysis of Genotype by Environment Interaction in Medium Maturing Upland Rice Genotypes in Ethiopia

Abstract

: The experiment was conducted in Woreta, Pawe, Metema, Assosa, Mytsebri, Bako, Bonga and Jimmafrom 2012-2014 main cropping seasons with the major objectives of medium maturing, high yielding and pest resistance rice varieties for the upland rice production system in Ethiopia. A total of 20 upland genotypes including one check were used in the study. The trial was laid out in randomized complete block design with three replications with plot size of 6.0 m 2 . The combined analysis of variance revealed significant difference on days to maturity, panicle length, plant height, fertile tiller per plant and grain yield (P≤0.01). G7 (IR 83384-B-B-102-3) was the highest yielding genotype followed by G3 (IR 78937-B-20-B-B-4) and G5 (IR 83750-B-B-131-1) with grain yield of 4223.4, 3849.7 and 3776.3 kgha -1 , respectively. The GGE bi-plot graphic analysis revealed that the two principal components explained 76.42 % of the total GEI variance. GGE bi-plot analysis showed that G7 performed best in almost all environments except in E3 and E11. Grain yield performance and stability analysis revealed that G7 was the highest yielding and relatively stable. Therefore G7 was identified as candidate variety and it was verified along with the check on farmer’s field and on station.