Stability and yield performance of lablab genotypes across multiple environments in Ethiopia

In Ethiopia, the availability of quality animal’s feed is a greater challenge to livestock production than the animal genetic resources and their health problems. In this context to identify suitable genotypes for particular environment, 13 Lablab genotypes (Lablab purpureus L.) were examined across three different sites of Ethiopia during the year of 2020 and 2021 for their performance on dry matter yield. A randomized complete block design (RCBD) with three replications in each location was applied to complete the trials. The dry matter yields were logged and analyzed using the additive main effects multiplicative interaction (AMMI) and genotype plus genotype -by-environment (GGE) biplot models. The combined analysis of variance showed that dry matter yield was significantly affected by the environment (63.04%), followed by genotype (15.90%), and genotype by environment (G×E) interface (10.04%). Based on the AMMI and GGE biplot, the tested genotypes were categorized into four mega-environments. The first comprises E3 and E6, the second comprises E4, the third comprises E1, and the last mega-environment holds E2 and E5. The GGE biplot analysis revealed that the six endearing genotypes, G1, G3, G7, G12, and G13, scored higher dry matter yield in corresponding environments, While the AMMI model showed the G5, G6, G9, G10, and G11 were comparably stable higher yielders, whereas G12 had the highest dry matter yield but was an unstable genotype. Based on the AEC line, genotypes namely G10, G6, G2, and G5 were relatively stable, though G13, G3, and G1 were unstable genotypes. According to this finding, breeding improvement was shown in dry matter, and the selected genotypes could be suggested for national production.