Abstract: This Experiment was conducted to study the association among the yield contributing traits and their direct and indirect effects on the yield of sorghum. Knowing the association and path analysis of yield related traits is essential for breeders. So, this activity was conducted with the objectives of investigating the relationship among yield, yield related traits and their effect on yield. A total of 42 late and medium maturing sorghum genotypes were evaluated by using 7x6 triple lattice designs with three replications at Assosa in 2020 cropping season. For most of the investigated traits, the magnitudes of genotypic correlation coefficients were higher than the corresponding phenotypic correlation coefficients. This implies that there was inherent relationship between these traits. Grain yield showed significant and positive phenotypic and genotypic correlation with days to flowering, days to maturity, thousand grain weight and plant height. The strongest phenotypic association of grain yield was observed with thousand grain weight (r=0.82) followed by days to maturity (r= 0.63**) and days to flowering (r=0.53**). Apart from yield greater association was recorded between days to maturity and thousand grain weight (r= 0.65) followed by disease score with insect score (r=0.59). ). The strongest positive genotypic association was observed between grain yield and thousand grain weight (r=0.87**) followed by days to flowering and days to maturity (r= 0.78**) and thousand grain weight and days to maturity (r=0.78). Thousand grain weight has the highest positive direct (0.57) effect on grain yield while overall plant aspect has higher negative (-0.21) direct effect on grain yield.
Keywords: Association, positive, inherent, direct effect, relationship