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作物学报 ›› 2017, Vol. 43 ›› Issue (04): 496-500.doi: 10.3724/SP.J.1006.2017.00496
宫希1,蒋云峰2,徐彬杰2,乔媛媛2,华诗雨1,吴旺1,马建2,周小鸿2,祁鹏飞2,*,兰秀锦2
GONG Xi1,JIANG Yun-Feng2,XU Bin-Jie2,QIAO Yuan-Yuan2,HUA Shi-Yu1,WU Wang1,MA Jian2,ZHOU Xiao-Hong2,QI Peng-Fei2,*,LAN Xiu-Jin2
摘要：
芒长是普通小麦的重要农艺性状，受多个基因控制。本研究利用长芒的普通小麦郑麦9023与无芒的西藏半野生小麦Q1028构建一个重组自交系群体(186个株系)；采用SSR和DArT分子标记，构建覆盖小麦全基因组的遗传图谱(2597 cM)。基于重组自交系群体两年芒长表型数据，采用ICIM作图法对小麦芒长性状进行QTL定位分析。共检测到2个与芒长相关的QTL，即Qwa.sau-4AS和Qwa.sau-5AL。它们分别位于4AS和5AL染色体上，可分别解释7.4%和27.3%的表型变异。这2个QTL效应可能分别来源于钩芒基因Hd与抑芒基因B1。利用连锁标记进行基因型分析，表明Qwa.sau-4AS与Qwa.sau-5AL对芒长的抑制效果具有累加效应，且Qwa.sau-5AL效应强于Qwa.sau-4AS。本研究将为精细定位及克隆这2个QTL奠定基础。
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