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棉花学报  2013 

利用海岛棉染色体片段置换系改良新陆早45号纤维品质性状的研究

DOI: 1002-7807（2013）06-0496-07, PP. 496-502

Keywords: 海岛棉,染色体片段置换系,新陆早45号,纤维品质

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Abstract:

海岛棉染色体片段置换系是改良陆地棉纤维品质性状的重要种质资源之一。本研究以TM-1背景的海岛棉染色体片段置换系CSSL-122与新疆陆地棉品种新陆早45号及其杂交、回交BC2F1群体的120个单株为实验材料，利用被定位在海岛棉染色体上与纤维长度、强度性状紧密连锁的19对SSR标记，在亲本间进行多态性检测，采用多态性标记对BC2F1群体中的单株进行海岛棉染色体片段的跟踪和鉴定；同时结合纤维品质性状指标的检测结果，对含有海岛棉染色体片段的阳性植株与无海岛棉染色体片段的非阳性植株进行纤维品质指标的比较分析。结果表明2对与长度性状连锁的SSR标记NAU2987和BNL3145在双亲间多态性明显，能准确地鉴定BC2F1群体中的阳性植株；与非阳性植株相比，阳性植株的纤维长度、强度均有极显著地提高（P<0.01）；在改良过程中，阳性植株的纤维长度和强度的提高呈极显著的相关性，说明纤维长度和强度性状可以同步提高。该研究结论可为利用海岛棉染色体片段置换系改良陆地棉纤维性状提供理论依据和参考信息。

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