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基于CSSSLs的水稻穗长QTL的定位

DOI: 10.3969/j.issn.1000-7091.2012.01.013, PP. 68-73

Keywords: 水稻,穗长,单片段代换系,QTL

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Abstract:

穗长是影响水稻产量的重要因子之一,是典型的数量性状,遗传基础复杂,且易受环境等因素的影响。染色体单片段代换系(Chromosomesinglesegmentsubstitutionlines,CSSSLs)减少了个体间遗传背景的干扰,是鉴定复杂性状QTL的新型遗传材料。本研究以广陆矮4号为受体、日本晴为供体的85个染色体单片段代换系群体为试验材料,通过单因素方差分析和Dunnett's多重比较测验单片段代换系与受体亲本广陆矮4号之间穗长的差异,对代换片段上穗长QTL进行了鉴定。以P<0.001为阈值,共检测到22个穗长QTLs,分布于除第10染色体以外的11条染色体上,其加性效应值的变化范围为-2.63~3.87,加性效应百分率变化范围为-11.47%~16.88%。这些QTLs的鉴定,为进一步克隆穗长QTL以及水稻穗长的分子改良提供了重要的依据。

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