摘要： 本文应用多元分析法定量分析了41份陆地棉亲本之间的遗传差异.通过主成份分析,筛选出邯14、贝尔斯诺、B163等15个综合指标较高的材料.根据遗传差异的大小,将研究品种划分5个类群,类群间的遗传距离在9.45—30.04之间,表明陆地棉亲本材料遗传基础比较丰富.出现了遗传差异较为特殊的优良材料——贝尔斯诺.但多数品种之间产量性状的遗传差异较小,丰产性品种选育仍需加强种质资源的引进和创新工作.

关键词: 陆地棉, 遗传差异

Abstract: The genetic divergence among 41 upland cotton genotypes was quantitatively studied by using principal component analysis. H14. Bailschlo, B163 and other 12 parents were picked out to be regarded as having higher multiple index than others. The fifteen genotypes were grouped into five clusters, in whith the genetic distance, ranged from 9.45 to 30.04, according to their genetic divergence. The results indicated that the genetic basic in upland cotton parents was rich. Variety 'Bailschlo' showed its specific excellence in genetic divergence. But among most of the genotypes, yield character showed a little genetic divergence. So the breeding for high yield varieties should still based on the introduction and creation of new germ plasm resources.

Key words: Upland cotton, Genetic divergence