发掘人工合成小麦中千粒重QTL的有利等位基因

被引：29

作者：

廖祥政 ^{[1
,2
]}

王瑾 ^{[2
]}

周荣华 ^{[2
]}

任正隆 ^{[1
]}

贾继增 ^{[2
]}

机构：

[1] 四川农业大学农学院

[2] 中国农业科学院作物科学研究所/农业部作物种质资源与生物技术重点开放实验室

来源：

作物学报 | 2008年 / 11期

关键词：

小麦; 微卫星标记; 数量性状基因座; 千粒重;

D O I：

暂无

中图分类号：

S512.1 [小麦];

学科分类号：

0901 ;

摘要：

以人工合成小麦Am3为供体亲本,普通小麦莱州953为轮回亲本,经5次回交然后自交,培育出含85个株系的F2:3群体。以该群体为材料,用348对多态性SSR标记,进行全基因组扫描,发掘人工合成小麦中千粒重QTL的有利等位基因。利用复合区间作图法检测到3个千粒重QTL,其对表型变异的贡献率为10.90%～33.79%。其中,Am3的等位基因能够增加千粒重2.3～4.8g。相关分析表明,该导入系群体的千粒重与穗粒数、穗数和株高无显著相关性。千粒重QTL与穗粒数、穗数性状的QTL不在同一位置,这有利于高千粒重基因与其他产量性状基因的聚合。采用混合线性模型作图法检测到1个千粒重QTL(QGw.caas-3D),该QTL与环境互作效应小,而且与复合区间作图法在3个环境中都检测到的QTL相同,表明QGw.caas-3D是一个稳定的主效QTL。

引用

页码：1877 / 1884

页数：8

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