【摘要】 以剑叶角度差异显著的籼稻窄叶青 8号和粳稻京系 17以及由它们构建的加倍单倍体群体为材料 ,在抽穗期测量其剑叶角度 ,并利用该群体构建的分子图谱进行数量性状座位分析。分别在第 1、2、3和 12染色体上检测到 4个QTL(qFLA 1、qFLA 2、qFLA 3和qFLA 12 ) ,贡献率分别为 10 .6 %、11.8%、9.8%和 8.1%,其中qFLA 1、qFLA 2的加性效应来自京系 17,qFLA 3和qFLA 12的加性效应来自窄叶青 8号。多个增效等位基因的聚合明显提高剑叶角度。讨论了这些控制剑叶张开性状的QTL在常规稻和杂交稻育种上的应用前景。更多还原

【Abstract】 A DH population derived from the cross of Zhaiyeqing 8/Jingxi 17, which were significantly different in flag leaf angle, was used in QTL analysis of flag leaf angle in rice. The flag leaf angles of DH population were investigated at heading stage. QTL analysis was taken based on the constructed molecular linkage map. Four QTLs (qFLA-1, qFLA-2, qFLA-3 and qFLA-12) were detected on chromosome 1, 2, 3 and 12, respectively, and their variations were 10.6%, 11.8%, 9.8% and 8.1%, respectively. The additive effects of qFLA-1 and qFLA-2 were contributed by Jingxi 17, whereas those of qFLA-3 and qFLA-12 were contributed by Zhaiyeqing 8. Pyramiding of increasing alleles enlarged the flag leaf angle. The prospective application of the QTLs for flag leaf character in rice breeding was also discussed.更多还原