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研究了陆地棉主要性状对混选—混交育种体系的响应。两轮群体提高了产量、早熟性和降低了麦克隆值的平均数;扩大了纤维品质的变幅;增加了高产株率,但对改进抗枯黄萎病性不明显。一轮群体的效果低于二轮。两次混交扩大了产量和纤维品质的变幅,增加了正末端的个体频率。一次混交的作用不及两次。早代混选相对缩小了群体变幅。一次混交后再经两代开放授粉和对一轮群体再混选,均表现出有益的反响。
The response of the main characters of upland cotton to mixed selection-mixed breeding system was studied. Two rounds of population increased yield, precocity and decreased the average number of micronaire values; increased fiber quality amplitude; increased high yield rate, but not obvious improvement on resistance to Verticillium wilt. The effect of a round of less than two rounds. Twice the crosses expanded the yield and the quality of the fiber and increased the number of individuals at the positive end. The effect of a mixture is less than twice. Early mixed selection relatively narrowed the group amplitude. After a mix after two generations of open pollination and re-election of a round of groups, have shown a beneficial response.