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水稻的粒重在不同环境中较其他性状的变异性小。从粒重与其他性状的相关性分析中认为，谷粒千粒重小于４０ｇ的种质其粒重与其它性状无明显相关，千粒重大于４０ｇ的种质其粒重与着粒密度关系较密切，与生育期、穗长、每穗粒数、结实率有些相关，而与株高和有效穗数关系不密切。对不同千粒重种质的粒重与粒形和米粒外观品质的分析认为，谷粒千粒重越大，米粒外观品质上等的种质较少，谷壳增厚，米粒腹白较大
The grain weight of rice is less variable than other traits in different environments. According to the correlation analysis of grain weight and other traits, the grain weight of grain with grain weight less than 40g was not significantly correlated with other traits. The grain weight with grain weight more than 40g had a close relationship with grain density, Period, spike length, grain number per spike, seed setting rate, but not with plant height and effective panicle number. The analysis of grain weight, grain shape and appearance quality of different thousand-seed weight germplasm suggests that the larger the 1000-grain weight of grain, the less the germplasm of the same quality, the thicker the chaff and the larger white belly