Fine Mapping of a Novel defective glume 1 (dg1) Mutant, Which Affects Vegetative and Spikelet Development in Rice

文献类型： 外文期刊

第一作者： Yu, Haiping

作者： Yu, Haiping;Ruan, Banpu;Zhang, Yu;Chen, Wenfu;Yu, Haiping;Ruan, Banpu;Zhang, Yu;Chen, Wenfu;Yu, Haiping;Ruan, Banpu;Wang, Zhongwei;Ren, Deyong;Zhang, Yu;Leng, Yujia;Zeng, Dali;Hu, Jiang;Zhang, Guangheng;Zhu, Li;Gao, Zhenyu;Chen, Guang;Guo, Longbiao;Qian, Qian

作者机构：

关键词： rice (Oryza sativa L.);dg1 mutant;dwarfism and rolled leaves;leaf angle;BR signaling;glumes;grain size

期刊名称：FRONTIERS IN PLANT SCIENCE （ 影响因子：5.753； 五年影响因子：6.612 ）

ISSN： 1664-462X

年卷期： 2017 年 8 卷

页码：

收录情况： SCI

摘要： In cereal crops, vegetative and spikelet development play important roles in grain yield and quality, but the genetic mechanisms that control vegetative and spikelet development remain poorly understood in rice. Here, we identified a new rice mutant, defective glume 1 (dg1) mutant from cultivar Zhonghua11 after ethyl methanesulfonate treatment. The dg1 mutant displayed the dwarfism with small, rolled leaves, which resulted from smaller cells and more bulliform cells. The dg1 mutant also had an enlarged leaf angle and defects in brassinosteroid signaling. In the dg1 mutant, both the rudimentary glume and sterile lemma (glumes) were transformed into lemma-like organ and acquired the lemma identity. Additionally, the dg1 mutant produced slender grains. Further analysis revealed that DG1 affects grain size by regulating cell proliferation and expansion. We fine mapped the dg1 locus to a 31-kb region that includes eight open reading frames. We examined the DNA sequence and expression of these loci, but we were not able to identify the DG1 gene. Therefore, more work will be needed for cloning and functional analysis of DG1, which would contribute to our understanding of the molecular mechanisms behind whole-plant development in rice.

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