The causal deletions in the second exon of An-3 closely associated with awn development and rice yield

文献类型： 外文期刊

第一作者： Li, Yunzhen

作者： Li, Yunzhen;Wu, Zishuai;Liu, Fang;Qiu, Yongfu;Li, Rongbai;Qin, Baoxiang;Liu, Lilong;Li, Yunzhen;Wei, Minyi;Wu, Zishuai;Liu, Fang;Qiu, Yongfu;Luo, Jijing;Li, Rongbai;Qin, Baoxiang;Li, Rongbai;Qin, Baoxiang;Luo, Jijing;Wei, Minyi

作者机构：

关键词： Rice;Awn;An-3;Epidermal patterning factor-like protein

期刊名称：GENES & GENOMICS （ 影响因子：1.839； 五年影响因子：1.329 ）

ISSN： 1976-9571

年卷期： 2017 年 39 卷 11 期

页码：

收录情况： SCI

摘要： Awn is one of important traits during rice domestication. To understand the development of rice awn and the roles it played in rice domestication, we preliminary mapped a major QTL An-3 for awn development using chromosome segment substitution line CSSL138 developed by introgressed genomic fragments of long-awned Guangxi common wild rice (GXCWR, Oryza rufipogon Griff.) into genetic background of short-awned indica cultivar 93-11. An-3 was then fine mapped to a 7-kb region of chromosome 8. An epidermal patterning factor-like protein gene was identified as the single candidate gene corresponding to this QTL. An-3 was showed to be an allele of RAE2 and GAD1, and negatively regulated 1000-grains weight, grain length, and length-width ratio. Comparing with the coding sequences of An-3 from CSSL138, a 2- and 4-bp frame-shift deletions in the second exon were identified in 93-11 and Nipponbare, respectively. Taken together, our results provide valuable natural variation in the alleles of An-3 between common wild rice and cultivated rice, which will be helpful in clarifying the mechanism of awn development and promoting the application of an-3 in genetic improvement of rice yield traits.

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