Genotype by environment interaction and yield stability of common vetch (Vicia sativa) genotype in Bale Zone of Oromia, Southern Ethiopia
DOI:
https://doi.org/10.21839/jfna.2025.v8.9720Keywords:
AMMI, Dry matter yield, Genotypes, Stability, Vicia sativaAbstract
Animal production faces a major challenge due to feed scarcity, both in quantity and quality, which calls for improvements in forage technology to fill the current feed gaps. This study aimed to identify high-yielding and stable genotypes of Common Vetch. Ten genotypes (LRI-5138, ILRI-5161, ILRI-5168, ILRI-5170, ILRI-5173, ILRI-5190, ILRI-5196, ILRI-5199, ILRI-5207, and ILRI-5209 were evaluated alongside a standard check (ICARD16509), organized in a Randomized Complete Block Design (RCBD) with three replications. Agronomic performance and yields varied significantly among genotypes, environments, and their interactions (G x E). The Additive Main effects and Multiplicative Interaction (AMMI) analysis indicated that the environment accounted for 68.19% of the total variation in dry biomass yield. In comparison, genotype and G x E interaction contributed 14.46% and 17.35%, respectively. The highest herbage dry matter yield was recorded for genotype ILRI-5209 (7.21 t ha-1), followed by ILRI-5207 (6.93 t ha-1) across various environments with dry matter yield advantages of 38.92% and 26.20% over the standard check, in that order. The analysis of chemical compositions showed significant differences (p<0.05) among tested genotypes for all parameters. Crude protein (CP) content was highest for genotype ILRI-5207 (21.99%), followed by ILRI-5209 (21.09%), whereas the local genotype ILRI-5138 had the lowest CP content (16.13%). Therefore, given their high yield potential and nutritional quality, ILRI-5209 and ILRI-5207 are recommended for further verification and potential release in the highlands of Bale and similar agro-ecological areas.
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