Genotype – genotype × environment (GGE) biplot analysis of winged bean for grain yield

Abstract The winged bean is an underutilized legume that adapted to the tropics. It has good prospects as a significant multi-purpose food crop including human nutrition, cattle feed, and environmental protection. However, little research attention been given address identified constraints, especially low yield in Nigeria. To improve its potential, GGE biplot analysis was used identify high-yielding stable genotypes, previously collected from continent of Asia, Nigeria for improvement. Twenty genotypes were being evaluated under rainfed condition at three locations (Ibadan, Ile-Ife, Kishi) two years, comprising six environments. obtained results showed seed (SY) ranged 805.61 kg.ha −1 (Ibadan) 1,096.35 (Kishi), with SY 988.42 across locations. reached first flowering, 50% podding, 70% physiological maturity 74, 80, 93, 137 days after planted, respectively principal component (PC) axes captured 71.5% total variation, where PC1 PC2 responsible 36.6% 34.9%, respectively. Genotype, environment, their interaction had effect on SY. Environments IB20 IF20 adjudged most ideal environments discriminate between genotypes. Genotype Tpt-12 stable. would be recommended commercial farming southwestern selected are hereby promising parental lines grain improvement programs.