Natural variation in OsMYB8 confers diurnal floret opening time divergence between indica and japonica subspecies
文献类型： 外文期刊
作者： Gou, Yajun 1 ; Heng, Yueqin 1 ; Ding, Wenyan 1 ; Xu, Canhong 1 ; Tan, Qiushuang 1 ; Li, Yajing 1 ; Fang, Yudong 1 ; Li, Xiaoqing 1 ; Zhou, Degui 2 ; Zhu, Xinyu 1 ; Zhang, Mingyue 1 ; Ye, Rongjian 3 ; Wang, Haiyang 1 ; Shen, Rongxin 1 ;
作者机构： 1.South China Agr Univ, State Key Lab Conservat & Utilizat Subtrop Agrobio, Guangdong Lab Lingnan Modern Agr, Guangzhou 510642, Peoples R China
2.Guangdong Acad Agr Sci, Rice Res Inst, Guangdong Key Lab New Technol Rice Breeding, Guangzhou 510640, Peoples R China
3.China Natl Seed Grp Co LTD, Life Sci & Technol Ctr, Wuhan 430073, Peoples R China
期刊名称：NATURE COMMUNICATIONS （ 影响因子：16.6； 五年影响因子：17.0 ）
ISSN：
年卷期： 2024 年 15 卷 1 期
页码：
收录情况： SCI
摘要： The inter-subspecific indica-japonica hybrid rice confer potential higher yield than the widely used indica-indica intra-subspecific hybrid rice. Nevertheless, the utilization of this strong heterosis is currently hindered by asynchronous diurnal floret opening time (DFOT) of indica and japonica parental lines. Here, we identify OsMYB8 as a key regulator of rice DFOT. OsMYB8 induces the transcription of JA-Ile synthetase OsJAR1, thereby regulating the expression of genes related to cell osmolality and cell wall remodeling in lodicules to promote floret opening. Natural variations of OsMYB8 promoter contribute to its differential expression, thus differential transcription of OsJAR1 and accumulation of JA-Ile in lodicules of indica and japonica subspecies. Furthermore, introgression of the indica haplotype of OsMYB8 into japonica effectively promotes DFOT in japonica. Our findings reveal an OsMYB8-OsJAR1 module that regulates differential DFOT in indica and japonica, and provide a strategy for breeding early DFOT japonica to facilitate breeding of indica-japonica hybrids.
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