Ten genetically diverse sesame (Sesamum Indicum L.) parents were crossed in half diallel fashion. Ten parents along with their 45 F1 progenies excluding reciprocal were evaluated in a randomized block design with three replications under normal (E1), late (E2), very late (E3) sown conditions of Rajasthan. The evaluation of components of genetic variation manifested that both additive (D) and dominance (H1 and H2) components were significant for all the attributes except capsule girth in very late sown condition where additive dominance model fitted. This revealed that fixable as well as non- fixable component of variances were operating in the expression of the traits. The graphical analysis revealed that there was partial dominance to over dominance for different characters under normal, late as well as very late sown conditions. The scattering of array points indicated the existence of genetic diversity among the parents for most of the traits.