A study was conducted to estimate the extent of heterobeltiosis, standard heterosis and the nature of gene action for various quantitative traits using line x tester analysis. Among the parents, GR 11, GR 7, NWGR 98002, GR 102, M 45-20-1, TN 1, NWGR 9635 and NWGR 97042 were the best performing parents for grain yield plant^-1 and its component traits. Cross combinations GR 7 x IR 64, GR 7 x Narmada, Gurjari x Jaya, Gurjari x GR 102, GR 104 x NWGR 97042 and GR 11 x TN 1 exhibited high significant sca effects with high per se performance and standard heterosis over GR 7. High magnitude of heterobeltiosis and standard heterosis were observed for grain yield plant^-1, plant height, effective tillers plant^-1, 1000-grain weight, grains panicle^-1 and harvest index. Cross combinations GR 7 x IR 64, GR 7 x Narmada, Gurjari x Jaya, Gurjari x GR 102, GR 104 x NWGR 97042 and GR 11 x TN 1 exhibited highly significant heterosis over GR 7.