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Present study was conducted involving 54 rice hybrids to study standard heterosis expression for yield and some yield components characters viz., days to 50 per cent flowering, days to maturity, plant height, panicle length, productive tillers per plant, filled grains panicle-1 , total number of grains panicle-1 , spikelet fertility, test weight and grain yield plant-1. | Exploitation of heterosis for yield and its components in rice