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Rapid Identification by Resequencing-Based QTL Mapping of a Novel Allele RGA1-FH Decreasing Grain Length in a Rice Restorer Line 'Fuhui212'

文献类型： 外文期刊

作者： Ma, Shiying 1 ; Zhong, Yifan 1 ; Zheng, Shuyi 1 ; He, Ying 1 ; Yang, Sihai 1 ; Wang, Long 1 ; Traw, Milton Brian 1 ; Zhang, Qijun 2 ; Zhang, Xiaohui 1 ;

作者机构： 1.Nanjing Univ, Sch Life Sci, State Key Lab Pharmaceut Biotechnol, Nanjing 210023, Peoples R China

2.Jiangsu Acad Agr Sci, Inst Food Crops, Nanjing 210014, Peoples R China

关键词： Fuhui212; grain length; grain size; QTL mapping; RGA1; rice

期刊名称：INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES （ 影响因子：5.6； 五年影响因子：6.2 ）

ISSN： 1661-6596

年卷期： 2023 年 24 卷 13 期

页码：

收录情况： SCI

摘要： Grain size is one of the most frequently selected traits during domestication and modern breeding. The continued discovery and characterization of new genes and alleles in controlling grain size are important in safeguarding the food supply for the world's growing population. Previously, a small grain size was observed in a rice restorer line 'Fuhui212', while the underlying genetic factors controlling this trait were unknown. In this study, by combining QTL mapping, variant effect prediction, and complementation experiments, we recovered a novel allele RGA1-FH that explains most of the phenotypic changes. The RGA1-FH allele contains an A-to-T splicing site variant that disrupts the normal function of RGA1. While population analysis suggests extremely strong artificial selection in maintaining a functional allele of RGA1, our study is the first, to the best of our knowledge, to prove that a dysfunctional RGA1 allele can also be beneficial in real agricultural production. Future breeding programs would benefit from paying more attention to the rational utilization of those overlooked 'unfavored' alleles.

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