DOI: https://doi.org/10.36347/sjavs.2025.v12i01.003

Pages: 35-47

Feed scarcity in terms of quantity and quality is the key factors that hinders animal production which needs advancement of forage technology that an able to fulfill the feed gaps. Thus the study was conducted to identify high yielding and stable genotype/s. Twelve oat genotypes including standard checks were laid out in randomized complete block design (RCBD) with three replications. Agronomic performances and yield showed significant difference in genotypes and environments but not their interactions. The additive main effect and multiplicative interactions (AMMI) analysis of variance revealed significant variations for environment effect account for 19.5%, genotypes G x E interaction effect accounted for 8.34% and 3.12% of the total variations respectively. This indicated that the major factor that influenced the yield performance of the tested genotypes was the environment. The higher dry matter yield of the combined mean was obtained from genotype ILRI-5433(9.64 tha) followed by genotype ILRI-5444(9.58 tha) among the tested genotypes across the environment. From stability analysis point of view genotype ILRI-5433 followed by genotype ILRI-5444 were stable genotypes with a high mean dry matter yield advantage of 20.85% and 20.35% over the standard check respectively. Therefore, genotype ILRI-5433 and ILRI-5444 because of their yielding potential and stability in the testing environments were selected as candidate genotypes to be verified for possible release in southern Oromia and other area with similar agro-ecology.