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本文以六个亲本的的双列杂交F，组合产量比较的资料，联系其早代表现，研究各亲本从低世代到高世代产量构成性状中的配合力变化．结果表明：地方品种紫皮产量的一般配合力从低世代到高世代由低转高．而外来品种PF52296则相反，说明产量一般配合力的变化与品种的生态适应性有关．千粒重与穗粒重在低代和高代有相似的趋势．因而就产量而言．用早代的一般配合力效应来判断亲本的优劣存在一定的问题．对亲本的选择应在一般配合力高的基础上再考虑特殊配合力．
In this paper, the crosses of six parents were used to study the changes of combining ability of parents from low generation to high generation generation traits. The results showed that the general combining ability of purple cultivars from low generation to high generation decreased from high to low. However, the exotic variety PF52296, on the contrary, indicated that the changes of the general combining ability of yield were related to the ecological adaptability of varieties. The 1000-grain weight and grain weight are similar in the low and high generations. Therefore, in terms of production. There are some problems with judging the parents’ merits by using the effect of early GCA. The choice of parents should be based on the general high combining power and then consider the special combining ability.