选用第7、13、25号染色体上纤维品质相关QTL(Quantitative trait locus)密集分布区间的48对SSR(Sim-ple sequence repeat)引物,对48份棉花种质进行多态性检测,研究结果显示在实验材料中3对SSR引物具有陆海差异多态性,相关分析表明3个优质基因SSR位点与纤维长度和纤维强度达到极显著相关。通过与海岛棉带型比对、追踪,从分子水平上明确了这些品种中来源于海岛棉渐渗于陆地棉的优异基因区段,为下一步分子标记辅助聚合育种提供了理论参考。 A total of 48 SSR (Sim-ple sequence repeat) primers were used to detect the genetic diversity of 48 cotton germplasms based on the quantitative trait locus (QTL) on chromosomes 7, 13 and 25. The results showed that Three pairs of SSR primers in the experimental material had land-sea difference polymorphism. Correlation analysis showed that the SSR loci of three high-quality genes had a very significant correlation with fiber length and fiber strength. By comparing and tracking with island cotton belt, the excellent gene segments derived from island cotton introgressed to Gossypium hirsutum were identified at the molecular level, which provided a theoretical reference for the next molecular marker assisted poly-breeding.