The variation in carbohydrate and nitrogen content in the known high (Ratna) and law (Pallavi) sterility rice cultures was studied under normal and low light (50% normal) conditions with a view to assessing the factors associated with spikelet sterility inrice. The high sterility line Ratna invariably showed lower carbohydrate and higher soluble nitrogen contents than the low sterility culture, Pallavi in both light regimes indicating that sterility in rice is associated with lower carbohydrate and greater soluble N accumulation in all the plant parts including the panicle.
