数字农科院2.0

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

作者机构：

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

期刊名称： NEW PHYTOLOGIST

ISSN： 0028-646X

年卷期： 2025 年

页码：

收录情况： SCIE（2025版）

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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