文献类型： 外文期刊
作者： Shi, Huan 1 ; Li, Pingbo 3 ; Yun, Peng 4 ; Zhu, Yun 1 ; Zhou, Hao 5 ; Wang, Lu 1 ; Wu, Bian 2 ; Wang, Yipei 1 ; Lou, Guangming 1 ; Huang, Qin 1 ; Gao, Guanjun 1 ; Zhang, Qinglu 1 ; Chen, Junxiao 2 ; Li, Jinbo 2 ; Xiao, Jinghua 1 ; You, Aiqing 2 ; He, Yuqing 1 ;
作者机构： 1.Huazhong Agr Univ, Natl Key Lab Crop Genet Improvement, Hubei Hongshan Lab, Wuhan, Peoples R China
2.Hubei Acad Agr Sci, Food Crops Inst, Wuhan, Peoples R China
3.Shandong Acad Agr Sci, Inst Wetland Agr & Ecol, Jinan, Peoples R China
4.Anhui Acad Agr Sci, Rice Res Inst, Hefei, Peoples R China
5.Sichuan Agr Univ, Rice Res Inst, State Key Lab Crop Gene Explorat & Utilizat Southw, Chengdu, Peoples R China
关键词： rice; GLW9; grain shape; EXPA6; tiller angle; OsPIN1b
期刊名称：PLANT BIOTECHNOLOGY JOURNAL （ 影响因子：10.5； 五年影响因子：12.4 ）
ISSN： 1467-7644
年卷期： 2025 年 23 卷 6 期
页码：
收录情况： SCI
摘要： Grain shape and tiller angle are two important agronomic traits influencing grain yield and quality in rice. Herein, we map-based cloned a grain shape gene GLW9 (Grain Length and Width on chromosome 9), which encodes a DNA binding with one finger (DOF) family transcription factor OsDOF25. GLW9 positively regulates grain length and negatively regulates grain width, consequently improving grain length-to-width ratio and appearance quality. GLW9 binds to the EXPA6 promotor to upregulate its expression, thereby positively regulating cell expansion and grain shape. On the other hand, GLW9 directly upregulates the expression of OsPIN1b to reduce tiller angle. This study elucidates the mechanism by which GLW9 coordinately regulates grain shape and tiller angle, providing theoretical reference and gene resources for the improvement of grain shape and tiller angle in rice.
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