粳稻垩白与产量性状、品质性状及其它性状的相关分析

Correlation analyses of chalkiness and other characters in Japonica rice

分析粳稻籽粒垩白与其它性状的相关结果，垩白与千粒重、产量有显著的正相关，而与有效穗数、每穗实粒数、株高、灌浆时间、熟期、完整精米率及粒形等的相关不显著。穗长、穗型与垩白的关系表现为，穗长＜１５ｃｍ的棒状型垩白指标偏高；穗长１５～１７ｃｍ的中间型垩白指标较低；穗长１７ｃｍ以下的弯弓型极大多数垩白指标与中间型相仿。选择穗数多、穗型中等或偏大、千粒重适宜的材料在可望获得高产的同时，改善米质。长粒型粳稻即使粒重大。

The correlation analyses of chalkiness and other characters in Japonica rice were studied The results showed that the correlations between chalkiness and 1000-grain weight, grain yield were significantly positive, but those correlations between chalkiness and productive panicle, grains per panicle, plant height, filling time, maturing time, head milled rice yield, grain shape were insignificant The relations between chalkiness and length of panicle, panicle type expressed that the chalkiness index of short-bar type (dense grain, panicle length<15cm) was high, and that of middle type (panicle length from 15 to 17cm) was low, and that of crooked type (panicle length>17cm) mostly similar to the middle type Therefore It is possible to breed new varieties with high grain yield as well as better quality by selecting the kind of materials with more productive panicle, medium of slightly large panicle and appropriate 1000-grain weight Japonica rice with length-grain maybe also have better quality even if its grain weight is high