The researchers studied different types of rice to see how the amount of amylose (a type of starch) varied in grains within a single rice panicle. They found that the amylose content varied between grains, with a larger range in compact panicles compared to loose ones. The amylose content in each grain followed a normal distribution pattern. The correlation between amylose content and grain position was stronger in loose panicles than in compact ones. Grains at the top of a branch had higher amylose content than those below. Overall, the distribution of amylose content in a panicle was similar between compact and loose panicle types. It is recommended to analyze the third or fourth grains in a panicle branch for amylose content analysis.