Genotype by environment interaction and stability analysis of sweet potato (Ipomoea batatas L.) genotypes in West Hararghe zone, Eastern Ethiopia

Sweet potato is an important food crop in Eastern Ethiopia, including the West Hararghe Zone. However, area still far behind attaining required optimum productivity of potato, this due to biotic and abiotic factors, inappropriate Agronomic practices lack improved variety, tackle these problems; variety improvement research major one. Therefore, objectives study were estimate magnitudes genotype, environment, genotype by environment interaction effects on genotypes identify high yielder stable for wide adaptability Zone, Ethiopia. The experiment was carried out at two locations (Mechara station Habro district) three consecutive years (2018–2020) 20 using a randomized complete block design (RCBD) with replications. Additive main multiplicative interactions analysis (AMMI) indicated that yield performances under environmental interactions. first principal component axes (PCA 1 2) significant (p≤0.01) cumulatively contributed 73% total interaction. In GGE bi-plot genotypic scores PCA lower 2 gave yields (stable genotypes), larger had low (unstable as sites tested. Besides, G3 G5 across tested higher root (43.94t ha-1 49.34 t ha-1), respectively). recommended possible release Zone similar agro-ecology country. Res. Agric. Livest. Fish. 10(1): 43-52