两系法超级杂交稻粒重分布的差异

采用大田栽培方法, 对两个大穗型两系超级杂交水稻培两优500和培两优E32稻穗上、中、下3个部位的平均籽粒重进行了研究。结果表明：稻穗上、中、下不同部位的平均粒重分布均呈正态性，不同部位间籽粒平均粒重方差齐性因品种自身充实程度而异，且稻穗上、中、下不同部位平均粒重均存在极显著差异。

Study on Difference of Grain Weight Distribution in Two-line Supper-hybrid Rice

Field rice culture experiments were conducted to study the distribution of the average grain weight within different parts of panicle of two-line supper-hybrid rice (peiliangyou E32 and peiliangyou 500) in this paper. The results show that the distribution of average grain weight of different panicle parts is normal distribution, the variance's homogeneity among parts, however, varies with the grain-filling characteristic of the variety. Very significant difference of average grain weight among parts of panicle is also found.