Mapping quantitative trait loci associated with starch paste viscosity in rice (Oryza sativa L.) under different environmental conditions

文献类型： 外文期刊

第一作者： Yao, Xiaoyun

作者： Yao, Xiaoyun;Wang, Jiayu;Liu, Jin;Zhang, Jia;Ma, Dianrong;Xu, Hai;Xu, Zhengjin;Yao, Xiaoyun;Wang, Jiayu;Zhang, Jia;Ma, Dianrong;Xu, Hai;Xu, Zhengjin;Liu, Jin;Ren, Chunyuan

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关键词： quantitative trait locus;rice;rapid visco analyser profile;subspecies differentiation;Wx gene

期刊名称：PLANT BREEDING （ 影响因子：1.832； 五年影响因子：1.956 ）

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收录情况： SCI

摘要： A recombinant inbred line (RIL) population consisting of 153 lines derived from a cross between indica Zhongyouzao8' and japonica Toyonishiki' rice was used to detect stable quantitative trait loci (QTL) for rapid visco analyser (RVA) characteristics under four environmental conditions. We identified 93 QTL for RVA profiles, and four pleiotropic regions harbouring stably expressed QTL were detected on chromosomes 2, 6, 7 and 11. These newly identified and stable QTL will facilitate further research into the genetic mechanism regulating RVA profiles. Amylose content (AC) was correlated with RVA traits. AC and RVA traits were unaffected by indica-japonica subspecies differentiation, suggesting that RVA profiles were mainly influenced by the Wx gene. The RIL population was divided into two subpopulations according to Wx genotypes. A total of 106 QTL associated with RVA profiles were detected in the subpopulations. These QTL differed from those detected in the whole population in terms of their genomic location, number, logarithm of odds values and amount of phenotypic variance explained. Using this strategy, we detected QTL with minor effects and eliminated false due to the Wx gene.

分类号： S8

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