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为了研究冬小麦杂种后代灌浆速度遗传规律,我们从三个角度,十五种双亲灌速组合类型,分析了灌浆速度的遗传特点和遗传参数、不同双亲灌速组合类型对后代灌速的影响及其亲子关系密切程度;同时还对灌速进行了通径分析.结果表明,灌速为数量性状、不完全显性,呈现细胞核遗传和明显的“倾快”现象.后代灌速受双亲灌速共同作用,其中快亲起主导作用,慢亲也有一定的制约作用.双亲差异愈小,亲子关系愈密切;其中双亲灌速平均值与后代的关系皆比母与子、父与子密切:而父与子较母与子关系密切.灌速遗传力较高,在早代进行个体定向选择,可望获得较好的选择效果.欲提高灌速,要注重千粒重、功能叶面积、株粒重的选择,同时兼顾灌浆时间、株穗数、株粒数的选择,使其协调发展,综合提高.综合分析,以双亲灌速快,且灌速差异中等偏小,快速亲本作父本的组配形式为最好.
In order to study the inheritance of grain filling rate of winter wheat hybrid progeny, we analyzed the genetic characteristics and genetic parameters of filling rate from three perspectives and fifteen kinds of parents’ Parent-child relationship closely; at the same time also carried out a path analysis of the irrigation rate.The results showed that the filling rate of quantitative traits, not completely dominant, showing the nucleus heredity and obvious “dumping” phenomenon. Which play a leading role in fast, slow relatives also have some constraints.The smaller the difference between parents, the closer parent-child relationship; Which the average rate of parental perfusion and offspring than the mother and the child, the father and the child close: the father And the child is more closely related to the mother and the child.The heritability of irrigation is higher, and in the early generation of individual orientation selection, is expected to get a better selection effect.If you want to improve the speed, should pay attention to the 1000-grain weight, functional leaf area, grain weight Selection, taking into account the choice of grouting time, spike number per panicle and the number of grains per plant, so as to coordinate the development and improve comprehensively.A comprehensive analysis showed that the parents with fasting parents and fasting parents Form for the best.