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本文对小麦抽穗期等九个性状与产量的遗传相关进行了分析。结果表明:与产量遗传相关极显著的性状有六个,其顺序为:株高>主茎秆重>主穗粒重>千粒重>穗长>抽穗期。这些性状对产量的相关遗传进度的顺序与其遗传相关系数顺序相同。小麦产量的选择指数以Y=70.79X_8-122.36X_7+3.50X_9+5.52X_4为最高,可据主茎秆秆重、主穗粒重、千粒重、穗长四性状或与上述选择指数相近的Y=72.58X_8-101.11X_7+3.06X_9,即主茎秆重、主穗粒重、千粒重三性状来间接地选产量。
In this paper, the genetic correlations between nine traits such as heading date in wheat and yield were analyzed. The results showed that there were six extremely significant traits associated with the yield, the order of which was: plant height> main stalk weight> main grain weight> 1000-grain weight> panicle length> heading stage. The order of genetic progress related to yield for these traits is in the same order of their genetic correlation coefficient. The selection index of wheat yield was highest with Y = 70.79X_8-122.36X_7 + 3.50X_9 + 5.52X_4, which could be calculated from the main stalk weight, the main ear grain weight, the 1000-grain weight, the spike length IV or the Y = 72.58X_8-101.11X_7 + 3.06X_9, that is, the main stem weight, main ear grain weight, 1000 grain weight three traits indirectly to choose the yield.