Clustered QTL for source leaf size and yield traits in rice (Oryza sativa L.)
Clustered QTL for source leaf size and yield traits in rice (Oryza sativa L.)
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水稻源叶大小和产量性状的聚类 QTL（Oryza sativa L.）
DOI：
10.1007/s11032-010-9529-7
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发表时间：
2012-01-01
影响因子：
3.1
通讯作者：
Yu, Sibin
中科院分区：
文献类型：
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作者：
Wang, Peng;Zhou, Guilin;Yu, Sibin
株型改良在水稻超高产育种中占有重要地位。本研究以优质杂交亲本9311和珍山97为亲本，利用回交重组自交系，对旗叶大小、穗数和产量性状进行了数量性状座位的定位。在两次环境试验中共检测到14个性状的47个QTL，其中9个基因组区域含有影响株型和产量性状的聚类性QTL。位于第1、6、7、8染色体上的4个共定位QTL包含控制穗重(PW)和二次枝数(SBN)等产量性状的QTL，位于第1、6、7和8染色体上的4个共定位QTL与旗叶大小(剑叶长、剑叶宽和剑叶面积)有关，9311的等位基因均增加源叶大小，并与库大小和产量(SBN和PW)相关。利用1号染色体上QTL区域重叠替换系的子集，验证了QTL的有效性，并将其缩小到990KBP的区间(RM3746-RM10435)，对旗叶大小、PW、SBN和每穗小穗数具有多效性。
Improvement of plant type plays an important role in super-high yield breeding in rice (Oryza sativa L.). In the present study, a set of backcross recombinant inbred lines derived from a cross of 9311 and Zhenshan97, both elite indica hybrid parents, were developed to identify quantitative trait loci (QTL) for flag leaf size, panicle and yield traits. Forty-seven QTL for 14 traits were detected in common in the two environmental trials, of which nine genomic regions contained clustered QTL affecting plant type traits and yield traits. Four co-localized QTL on chromosomes 1, 6, 7 and 8 involving QTL for flag leaf size (flag leaf length, width and area) contained the QTL for yield traits such as panicle weight (PW) and secondary branch number (SBN), and in all cases alleles from 9311 increased source leaf size and were associated with increased sink size and yield (SBN and PW). Using a subset of overlapping substitution lines for the QTL region on chromosome 1, the QTL were validated and narrowed into a 990 kbp interval (RM3746–RM10435) with pleiotropic effects on flag leaf size, PW, SBN and spikelet number per panicle.