Genotype by Environment Interaction and Seed Yield Stability of Soybean Cultivars in Eastern Amhara, Ethiopia

Abstract

Soybean is a crop of growing importance in Ethiopia. However, its production and productivity are affected by a limited access to improved cultivars in many areas. Hence, the performance of eight nationally released cultivars were evaluated for seed yield, seed protein and oil contents in Eastern Amhara area. The experiments were conducted for two consecutive years under rain fed condition at three locations using randomized complete block design with three replications. Analysis of varianceindicated that the tested cultivars showed inconsistent performance over locations and years. Additive Main Effect and Multiplicative Interaction [AMMI] analysis showed that 64.66%, 7.46% and 13.43% of the total variation was attributed to the respective environmental, genotypic and genotype by environment interaction effects. AMMI Stability Value and Genotype Selection Index were used to select stable cultivars with high seed protein or oil content, respectively for areas where seed protein or oil content is the primary production objective.

Keywords: AMMI, seed protein, seed oil

DOI: 10.7176/JBAH/13-16-01

Publication date:September 30^th 2023