Separation of quality seeds by density grading in stored seed lot of rice (Oryza sativa L.) hybrids

A study was carried out to standardize a suitable method to separate quality seeds from stored seed of rice hybrids. The results revealed that various physical and physiological seed quality parameters of stored seed lot of rice hybrids viz., 100 seed weight, free from insect infestation, seed germination, seedling length, dry matter production and vigour index were significantly improved by both specific gravity separation and salt solution upgradation at four per cent concentration. Hence it is concluded that for immediate sowing purpose salt upgradation may be followed and specific gravity separation may be followed for further storage of seeds.