Twenty five common bean genotypes were evaluated to assess the genetic variability, association among traits, and determine the direct and indirect effects of traits on seed yield. The genotypes were grown in lattice design at Melkassa and Miesso in 2018 cropping season. Analysis of variance revealed that significant differences were observed among the genotypes at individual location.The phenotypic coefficient of variation values were moderate for number of nodes, seeds per pod, plant height and hundred seed weight at Melkassa. Moderate genotypic coefficient of variation values were obtained for pods per plant and seeds per pods. At Miesso, moderate phenotypic coefficient of variation values were recorded for number of nodes, hundred seed weight, and plant height. High heritability estimates were obtained for seed yield and hundred seed weight at Melkassa, and for seed yield at Miesso; indicating that selection could be fairly easy and improvement is possible using these traits in breeding programs. High genetic advance were obtained for seed yield and pods per plant at Melkassa, while moderate genetic advance as percent of mean were attained for plant height, hundred seed weight, and seeds per pod. Similarly at Miesso, high and moderate genetic advance as percent of mean values were obtained for seed yield and hundred seed weight, respectively. Seed yield showed positive and significant phenotypic association with days to flowering, internode length, and pods per plant at Melkassa, and had positive and significant phenotypic association with seeds per pod and hundred seed weight at Miesso. Hence, selection of those genotypes based on the traits with high genotypic coefficient of variability, heritability, genetic advance and positive correlation coefficient and direct effect on seed yield can be recommended for further yield improvement at respective location.
Keywords: Correlation, Genetic Advance, Heritability, Variability, Yield