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Wheat domestication gene Q interplays with TaARF12 to antagonistically modulate plant architecture by integrating multiple hormone homeostasis

文献类型： 外文期刊

作者： Liu, Bingyan 1 ; Sun, Mengjing 1 ; Wang, Ke 1 ; Bian, Yingjie 1 ; Che, Yuqing 1 ; Liu, Jindong 1 ; Luo, Xumei 1 ; Liu, Siyang 1 ; Xie, Lina 1 ; Li, Lingli 1 ; Qu, Kejia 1 ; Chao, Yuheng 1 ; Che, Rui 1 ; Ye, Xingguo 1 ; Xia, Xianchun 1 ; Mao, Long 1 ; He, Zhonghu 1 ; Li, Aili 1 ; Cao, Shuanghe 1 ;

作者机构： 1.Chinese Acad Agr Sci, Inst Crop Sci, State Key Lab Crop Gene Resources & Breeding, Natl Wheat Improvement Ctr,Natl Key Facil Crop Gen, Beijing 100081, Peoples R China

2.Chinese Acad Agr Sci, Int Maize & Wheat Improvement Ctr CIMMYT China Off, Beijing 100081, Peoples R China

关键词： domestication gene Q; functional dissection; plant architecture; wheat; yield potential

期刊名称：NEW PHYTOLOGIST （ 影响因子：8.1； 五年影响因子：10.3 ）

ISSN： 0028-646X

年卷期： 2025 年

页码：

收录情况： SCI

摘要： Wheat domestication gene Q controls threshability and also pleiotropically affects plant morphogenesis. However, its specific roles in modulating plant architecture and the underlying mechanisms remain unclear. We dissected Q effects on plant architecture using transgenic overexpression and knockout assays. The analyses of micromorphological and dynamic imaging, physiological productivity, multi-omics, and molecular interaction were performed to dissect the underlying regulatory mechanism. Allelic variation and genetic effect assays were employed to identify desirable haplotypes. The domesticated Q allele 5AQ in wild-type lines optimized plant architecture and endowed yield gain by modulating cell size of stem internodes and flag leaves, tiller initiation and outgrowth, and photosynthetic capacity. Q regulated many homologs of previously reported functional genes controlling plant architecture, multiple hormone homeostasis, and cell wall components. Q upregulated plant architecture regulators TaARF12-2B and TaARF12-2D by binding to the promoters. However, Q and the TaARF12 genes antagonistically modulate plant architecture. The favorable haplotypes of TaARF12-2B and the functional variation site were identified, and their origin, spread, and distribution were also traced. These findings specify the Q function in controlling plant architecture and yield formation, broaden insights into the underlying mechanism, and provide new molecular tools for wheat improvement.

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