The researchers studied how different types of rice grains store starch and the enzymes involved. They found that the rate of starch accumulation in rice grains follows a specific pattern during growth. Amylose content peaked between 5-15 days after flowering, with Feiyou188 having the highest and Chengnuo88 the lowest. Amylopectin content increased significantly between 5-20 days after flowering, with B6you4761 having the highest. The activity of certain enzymes, like GBSS and SSS, affected starch accumulation. Feiyou88 had the highest amylose accumulation and enzyme activity, while Chengnuo88 had the highest amylopectin accumulation but low enzyme activity. Overall, the rate of starch accumulation in rice grains is linked to the activity of specific enzymes.