yield components, phenological , morphological, quality and disease resistance, by following ‘line . The present investigation was carried out to gather information on combining ability, gene action, genotype x environment interaction and magnitude of heterosis on different traits i.e. Significant genotype ? The magnitude of non-additive gene action was predominant for majority of the traits with maximum contribution of lines in the expression of gene action. environment interactions for all the characters indicated a definite role of environment on the performance of genotypes/crosses. tester interaction for majority of the traits. Chilli or Hot Pepper (Capsicum annuum var. annuum L.) is one of the most important economical and popular vegetable crops grown for its green fruits as vegetable and red form as spice. The line . A wide variation in magnitude and direction of... tester analysis revealed significant differences due to lines, testers and line ? tester’ mating design.