数字农科院2.0

Grain yield improvement by genome editing of TaARF12 that decoupled peduncle and rachis development trajectories via differential regulation of gibberellin signalling in wheat

文献类型： 外文期刊

作者： Kong, Xingchen;Wang, Fang;Wang, Zhenyu;Gao, Xiuhua;Geng, Shuaifeng;Deng, Zhongyin;Zhang, Shuang;Fu, Mingxue;Cui, Dada;Liu, Shaoshuai;Che, Yuqing;Liao, Ruyi;Yin, Lingjie;Zhou, Peng;Wang, Ke;Ye, Xingguo;Liu, Dengcai;Fu, Xiangdong;Mao, Long;Li, Aili

作者机构：

关键词： CRISPR/Cas9;TaARF12;grain yield;plant height;spike length;green revolution

期刊名称： PLANT BIOTECHNOLOGY JOURNAL

ISSN： 1467-7644

年卷期： 2023 年

页码：

收录情况： SCIE（2023版）

摘要： Plant breeding is constrained by trade-offs among different agronomic traits by the pleiotropic nature of many genes. Genes that contribute to two or more favourable traits with no penalty on yield are rarely reported, especially in wheat. Here, we describe the editing of a wheat auxin response factor TaARF12 by using CRISPR/Cas9 that rendered shorter plant height with larger spikes. Changes in plant architecture enhanced grain number per spike up to 14.7% with significantly higher thousand-grain weight and up to 11.1% of yield increase under field trials. Weighted Gene Co-Expression Network Analysis (WGCNA) of spatial-temporal transcriptome profiles revealed two hub genes: RhtL1, a DELLA domain-free Rht-1 paralog, which was up-regulated in peduncle, and TaNGR5, an organ size regulator that was up-regulated in rachis, in taarf12 plants. The up-regulation of RhtL1 in peduncle suggested the repression of GA signalling, whereas up-regulation of TaNGR5 in spike may promote GA response, a working model supported by differential expression patterns of GA biogenesis genes in the two tissues. Thus, TaARF12 complemented plant height reduction with larger spikes that gave higher grain yield. Manipulation of TaARF12 may represent a new strategy in trait pyramiding for yield improvement in wheat.

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