Evaluation of Relationship Between Grain Yield and Yield Components in Sesame (Sesamum indicum L.)

In order to evaluate the grain yield and yield component in sesame, an experiment with 112 genotypes in an augment design was conducted at the Research Station College, located at Lavark, Najafabad. The characters evaluated comprised: days to 50% flowering, days to maturity, 100-seed weight, plant height, Number of capsules per plant, first node height, seed weight per capsule and grain yield per plant. The correlation between grain yield per plant with number of capsule per plant, plant height, number of node on main stem and seed weight per capsule was significant and positive. In uni-lateral sesame genotypes, correlation between grain yield with a number of capsules per plant, seed weight per capsule, 100-seed weight was positive and significant, but the correlation of this character with the first fruiting node height was negative and significant. In multi-lateral sesame genotypes, the grain yield per plant had a positive and significant correlation with the number of capsules per plant, plant height, the number of nodes on the main stem and lateral stems, as well as this character had a negative and significant correlation with the number of primary branches. Stepwise regression analysis for grain yield per plant in uni-lateral and multi-lateral sesame genotypes showed that the number of capsules per plant is the most important grain yield component.