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水稻粒形相关性状及千粒重QTL的稳定性分析

DOI: 10.7685/j.issn.1000-2030.2008.03.001, PP. 1-7

Keywords: 水稻,粒形相关性状,千粒重,QTL,稳定性分析

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Abstract:

以Nipponbare(japonica)/Kasalath(indica)//NipponbareBC1F10的98个家系为材料,在3种环境下对水稻粒形相关性状及千粒重进行数量性状基因位点(quantitativetraitloci,QTL)的定位分析。利用QTLmapper1.6软件在全基因组水平上检测了粒形相关性状及千粒重QTL。结果表明,在3种环境下共检测到4、1、4、5、5个QTL,分别控制粒长、粒厚、粒宽、粒形和千粒重。鉴定了以Nipponbare为背景、Kasalath为置换片段的染色体片段置换系群体在3种环境中的表型值,发现与背景亲本相比,置换片段包含qGL-6的株系NK28、包含qGL-12的株系NK32粒长均明显变长;置换片段包含qGW-1和qGW-7的株系NK9和NK32粒宽均明显变窄;置换片段包含qLWR-5的株系NK22和NK32、包含qLWR-12的株系NK32粒形明显变大;置换片段包含qTGW-1-1的株系NK9千粒重显著降低。上述结果表明,这些QTL是稳定表达的主效QTL。

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