数字农科院2.0

QTL mapping of grain weight in rice and the validation of the QTL qTGW3.2

文献类型： 外文期刊

作者： Shao-qing, Tang;Gao-neng, Shao;Xiang-jin, Wei;Ming-liang, Chen;Zhong-hua, Sheng;Ju, Luo;Gui-ai, Jiao;Li-hong, Xie;Pei-song, Hu

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关键词： QTL mapping;Rice;Thousand grain weight

期刊名称： GENE

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收录情况： SCI

摘要： A recombinant inbred line (RIL) population bred from a cross between a javanica type (cv. D50) and an indica type (cv. HB277) rice was used to map seven quantitative trait loci (QTLs) for thousand grain weight (TGW). The loci were distributed on chromosomes 2, 3, 5, 6, 8 and 10. The chromosome 3 QTL qTGW3.2 was stably expressed over two years, and contributed 9-10% of the phenotypic variance. A residual heterozygous line (RHL) was selected from the RIL population and its selfed progeny was used to fine map qTGW3.2. In this "F2" population, the QTL explained about 23% of the variance, rising to nearly 33% in the subsequent "F2:3" generation. The physical location of qTGW3.2 was confined to a ~556kb region flanked by the microsatellite loci RM16162 and RM16194. The region also contains other factors influencing certain yield-related traits, although it is also possible that qTGW3.2 affects these in a pleiotropic fashion.

分类号： R394

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