作物学报 ›› 2018, Vol. 44 ›› Issue (01): 15-23.doi: 10.3724/SP.J.1006.2018.00015
孙爱伶1,伍洪铭1,陈高明1,张天雨1,曹鹏辉1,刘世家1,江玲1,*,万建民1,2
SUN Ai-Ling1,WU Hong-Ming1,CHEN Gao-Ming1,ZHANG Tian-Yu1,CAO Peng-Hui1,LIU Shi-Jia1,JIANG Ling1,*,WAN Jian-Min1,2
摘要:
水稻种子休眠性是关系到稻米品质和稻种质量的一个重要农艺性状。研究水稻种子休眠性遗传及分子机制对培育具有适度休眠性的优良水稻品种具有重要意义。本研究以籼稻品种9311为受体、普通野生稻为供体的染色体片段置换系群体为材料,在后熟不同时间检测群体种子休眠性,对控制种子休眠性的QTL进行定位分析,共定位到14个QTL,分布在第3、第4、第5、第6、第7、第10、第11、第12染色体上。筛选休眠性显著强于背景亲本9311的家系,分析这些家系携带的QTL数目,表明携带的位点越多,休眠性越强。进一步利用家系Q14与9311的F2群体验证了第7染色体标记RM180和RM21323之间存在一个效应较大的QTL qSD-7-2,该位点LOD值为18.49,可解释的表型变异率为33.53%,表明该位点是一个控制普通野生稻种子休眠性的主效QTL,且能稳定遗传。本研究为野生稻种子休眠基因的精细定位及克隆奠定了基础,且为培育强休眠性籼稻品种提供了育种材料。
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