导入海岛棉染色体片段对新疆陆地棉纤维品质性状的影响

摘要

Molecular markers of SSR were employed to accurately identify individual plants carrying the chromosome segments from Gossypium barbadense in two BC2F1 populations (Xinluzao 33×CSSL⁃122) and (Jinken 69⁃2×CSSL⁃122). And the fiber quality traits between positive plants and non⁃positive plants in two BC2 F1 populations were compared. The fi⁃bers of positive plants were significantly longer than those of non⁃positive plants. And fiber strengths and elongation rates of positive plants were higher than those of non⁃positive plants as well. It was suggested that introgressing alien chromosome segments from G. barbadense into Xinjiang up⁃land cotton had significantly improved its fiber quality.%为了研究导入海岛棉染色体片段对新疆陆地棉纤维品质的影响，利用陆地棉和海岛棉染色体片段置换系杂交回交构建了2个BC2 F1群体。利用SSR标记筛选鉴定BC2 F1群体中含有海岛棉染色体片段的阳性单株，分别对2个BC2 F1群体中阳性单株与非阳性单株的纤维品质性状进行比较分析。结果显示，在新陆早33号×CSSL⁃122的BC2 F1群体中，阳性植株纤维长度显著高于非阳性植株；在金垦69⁃2×CSSL⁃122的BC2 F1群体中，阳性植株纤维长度极显著高于非阳性植株，阳性植株的纤维强度、伸长率显著高于非阳性植株。说明导入外源海岛棉染色体片段，显著或极显著地提高了新疆陆地棉纤维长度、强度等性状。