A tandem segmental duplication (TSD) in green revolution gene Rht-D1b region underlies plant height variation

文献类型： 外文期刊

第一作者： Li, Yiyuan

作者： Li, Yiyuan;Xiao, Jianhui;Wu, Jiajie;Duan, Jialei;Liu, Yue;Ye, Xingguo;Zhang, Xin;Guo, Xiuping;Zhang, Lichao;Jia, Jizeng;Kong, Xiuying;Li, Yiyuan;Duan, Jialei;Gu, Yongqiang

作者机构：

关键词： copy number variation;gene expression;plant height;tandem segmental duplication (TSD);wheat (Triticum aestivum)

期刊名称：NEW PHYTOLOGIST （ 影响因子：10.151； 五年影响因子：10.475 ）

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收录情况： SCI

摘要： Rht-D1c (Rht10) carried by Chinese wheat (Triticum aestivum) line Aibian 1 is an allele at the Rht-DI locus. Among the Rht-1 alleles, little is known about Rht-DIc although it determines an extreme dwarf phenotype in wheat. Here, we cloned and functionally characterized Rht-DIc using a combination of Southern blotting, target region sequencing, gene expression analysis and transgenic experiments. We found that the Rht-DIc allele was generated through a tandem segmental duplication (TSD) of a > 1 Mb region, resulting in two copies of the Rht-Dlb. Two copies of Rht-Dlb in the TSD were three-fold more effective in reducing plant height than a single copy, and transformation with a segment containing the tandemly duplicated copy of Rht-Dlb resulted in the same level of reduction of plant height as the original copy in Aibian 1. Our results suggest that changes in gene copy number are one of the important sources of genetic diversity and some of these changes could be directly associated with importanttraits in crops.

分类号： Q94

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