作物学报 ›› 2009, Vol. 35 ›› Issue (6): 1038-1043.doi: 10.3724/SP.J.1006.2009.01038
王岩,李卓坤,田纪春*
WANG Yan,LI Zhuo-Kun,TIAN Ji-Chun*
摘要:
为研究小麦株高的遗传机制,利用DH群体构建了一套包含168个杂交组合的小麦永久F2群体, 并于2007年种植于山东泰安和山东聊城。构建了一套覆盖小麦21条染色体的遗传连锁图谱并利用该图谱的324个SSR标记对小麦株高进行QTL定位研究,使用基于混合线性模型的QTLNetwork 2.0软件进行QTL分析。在永久F2群体中定位了7个株高QTL,包括4个加性QTL,一个显性QTL,一对上位性QTL,共解释株高变异的20%,其中位于4D染色体的qPh4D,具有最大的遗传效应,贡献率为7.5%;位于2D 染色体显性效应位点qPh2D,可解释1.6%的表型变异;位于5B~6D染色体上位效应位点,可解释1.7%的表型变异。还发现加性效应、显性效应和上位效应对小麦株高的遗传起重要作用,并且基因与环境具有互作效应,结果表明利用永久F2群体进行QTL定位研究的方法有助于分子标记辅助育种。
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