Realizing the significance of edible oil in the Pakistan and role of brassica species in indigenous oilseed production, the current research review was directed to determine the role of combining ability (GCA and SCA) and heritability for the improvement of seed yield and various yield contributing characters in segregating generations of Brassica napus (Gobhi sarson). Study of pattern of combining ability of selected rapeseed (Brassica napus L.) genotypes in line × tester method helps to identify superior candidates (parental genotypes) to produce promising hybrid cross combinations.