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首页> 外文期刊>Journal of genetics >Quantitative trait loci for rice yield-related traits using recombinant inbred lines derived from two diverse cultivars
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Quantitative trait loci for rice yield-related traits using recombinant inbred lines derived from two diverse cultivars

机译：利用来自两个不同品种的重组自交系获得水稻产量相关性状的数量性状基因座

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The thousand-grain weight and spikelets per panicle directly contribute to rice yield. Heading date and plant height also greatly influence the yield. Dissection of genetic bases of yield-related traits would provide tools for yield improvement. In this study, quantitative trait loci (QTL) mapping for spikelets per panicle, thousand-grain weight, heading date and plant height was performed using recombinant inbred lines derived from a cross between two diverse cultivars, Nanyangzhan and Chuan7. In total, 20 QTLs were identified for four traits. They were located to 11 chromosomes except on chromosome 4. Seven and five QTLs were detected for thousand-grain weight and spikelets per panicle, respectively. Four QTLs were identified for both heading date and plant height. About half the QTLs were commonly detected in both years, 2006 and 2007. Six QTLs are being reported for the first time. Two QTL clusters were identified in regions flanked by RM22065 and RM5720 on chromosome 7 and by RM502 and RM264 on chromosome 8, respectively. The parent, Nanyangzhan with heavy thousand-grain weight, carried alleles with increased effects on all seven thousand-grain weight QTL, which explained why there was no transgressive segregation for thousand-grain weight in the population. In contrast, Chuan7 with more spikelets per panicle carried positive alleles at all five spikelets per panicle QTL except qspp5. Further work on distinction between pleiotropic QTL and linked QTL is needed in two yield-related QTL clusters.
机译：千粒重和每穗小穗直接影响水稻产量。抽穗期和株高也极大地影响产量。解剖与产量相关性状的遗传基础可为提高产量提供工具。在这项研究中，使用来自两个不同品种Nanyangzhan和Chuan7的杂交后代的重组自交系，对每穗小穗，千粒重，抽穗期和株高进行了数量性状基因座（QTL）定位。总共确定了四个性状的20个QTL。除了第4号染色体外，它们位于11条染色体上。分别检测到七个和五个QTL的千粒重和每个穗小穗。为抽穗期和株高确定了四个QTL。在2006年和2007年这两个年度，通常检测到大约一半的QTL。首次报告了六个QTL。在7号染色体上的RM22065和RM5720以及8号染色体上的RM502和RM264两侧的区域中鉴定出两个QTL簇。父本重达千粒重的南洋站携带的等位基因对所有七千粒重的QTL具有增强的影响，这解释了为什么人口中千粒重没有越界分离的原因。相比之下，每个穗数更多的小穗的Chuan7在每个穗数QTL的所有五个小穗上均携带正等位基因，但qspp5除外。在两个与产量相关的QTL聚类中，需要进一步进行多效QTL和链接QTL的区分。

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