Molecular mapping and candidate gene analysis of the semi-dominant gene Vestigial glume1 in maize
文献类型： 外文期刊
作者： Liu, Chaoxian 1 ; Zhao, Yuanzeng 2 ; Bai, Yang 1 ; Lu, Xiaomin 3 ; Song, Weibin 4 ; Qin, Liping 1 ; Cai, Yilin 1 ;
作者机构： 1.Southwest Univ, Maize Res Inst, Chongqing 400715, Peoples R China
2.Henan Inst Sci & Technol, Xinxiang 453003, Henan, Peoples R China
3.Henan Acad Agr Sci, Zhengzhou 450002, Henan, Peoples R China
4.China Agr Univ, Natl Maize Improvement Ctr China, Beijing 100193, Peoples R China
关键词： Vestigial glume1; Fine mapping; Candidate gene analysis; ZmCPA-FAS1; Glume development
期刊名称：CROP JOURNAL （ 影响因子：4.407； 五年影响因子：5.687 ）
ISSN： 2095-5421
年卷期： 2019 年 7 卷 5 期
页码：
收录情况： SCI
摘要： The glume is an organ of the maize spikelet and plays important roles in anther and kernel development. Vestigial glume1 (Vg1) is a classic mutant associated with ligule and glume development. Here we report the phenotypic characterization, fine mapping, and candidate gene analysis of the Vg1 mutant. Vg1 is a semi-dominant and pleiotropic gene, and also affects plant height, ear height, and tassel length. Vg1 ligule degeneration begins at the first leaf, and the Vg1 tassel and ear can be distinguished from those of wild-type plants when their lengths reach respectively 55 mm and 51 mm. Using a BC3 mapping population of 11,445 plants, we delimited the Vg1 functional site to an interval of 7.4 kb, flanked by the markers InDeILM and CRM6. A putative cyclopropane fatty-add synthase gene (ZmCPA-FAS1) was hypothesized to underlie the mutant phenotype. We detected a Helitron insertion in the sixth intron of ZmCPA-FAS1. Its presence caused abnormal alternative splicing of ZmCPA-FAS1 that conferred new characteristics on the Vg1 mutant. These findings are a basis for further discovery of the molecular mechanism underlying glume development and a potential guide for maize breeding of small-glume varieties, especially sweet corn breeding. (C) 2019 Crop Science Society of China and Institute of Crop Science, CAAS. Production and hosting by Elsevier B.V. on behalf of KeAi Communications Co., Ltd.
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