Heterosis in rice was studied in a set of four lines and 10 testers with their 40 hybrids. The magnitude of heterosis varied from cross to cross for all the characters studied. High heterotic effects were observed for days to 50% flowering, panicles per plant, plant height, panicle length, grains per panicle, grain yield per plant, 1000-grain weight, L/B ratio and amylose content. It was observed from the present study that heterotic response for grain yield per plant was mainly due to high heterotic response observed for panicles per plant, panicle length and grains per panicle.
Heterosis, L × T, Oryza sativa, Rice
