Doubts have been raised about the economic viability of hybrid seed production as rice is predominantly a self pollinated crop. An efficient seed production package is as important as improving cytosterile lines and developing and evaluating hybrids. We attempted to evaluate hybrid seed production technology using the new growth hormone Mangiferin because
the cost of gibberellic acid (GA3) was high. Besides Mangiferin, glycine was also used to economize hybrid seed production in rice. Using GA3, boric acid, urea, Mangiferin, and glycine in different concentrations, we studied their effect on several characters in hybrids, such as duration of opening of florets, stigma exsertion, angle of opened florets, plant height before and after spraying, panicle exsertion at 5%, at 50% flowering, and at maturity, grain yield ha-1, 1000-grain weight, and spikelet length.