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Journal of Integrative Agriculture  2022, Vol. 21 Issue (5): 1243-1252    DOI: 10.1016/S2095-3119(20)63480-3
Special Issue: 麦类遗传育种合辑Triticeae Crops Genetics · Breeding · Germplasm Resources
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TaIAA15 genes regulate plant architecture in wheat
LI Fu1*, YAN Dong2*, GAO Li-feng2, LIU Pan2, ZHAO Guang-yao2, JIA Ji-zeng2, REN Zheng-long1
1 Key Laboratory for Plant Genetics and Breeding, Sichuan Agricultural University, Ya’an 625014, P.R.China
2 National Key Facility for Crop Gene Resources and Genetic Improvement/Institute of Crop Sciences, Chinese Academy of Agricultural Sciences, Beijing 100081, P.R.China
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小麦(Triticum aestivum L.)是世界上最重要的粮食作物之一。生长素在调节植物生长发育中起关键作用。迄今为止,在小麦中几乎没有生长素相关基因被遗传证明参与小麦株型的调控。在这项研究中,我们克隆了小麦中生长素相关基因TaIAA15s,水稻中的异位表达TaIAA15-3B基因降低了水稻的株高,增加了叶夹角。小麦多样性群体相关性分析表明,TaIAA15-3B基因与小麦的株高(Ph),穗长(SL)和千粒重(TGW)相关;TaIAA15-3B的Hap-II单倍型是优异等位基因,在现代育种TaIAA15-3B的Hap-II单倍型被选择。这项研究揭示了生长素信号传导在小麦植物结构以及产量相关性状上的作用。

Abstract  Bread wheat (Triticum aestivum L.) is one of the most important staple crops worldwide.  The phytohormone auxin plays critical roles in the regulation of plant growth and development.  However, only a few auxin-related genes have been genetically demonstrated to be involved in the control of plant architecture in wheat thus far.  In this study, we characterized an auxin-related gene in wheat, TaIAA15, and found that its ectopic expression in rice decreased the plant height and increased the leaf angle.  Correlation analysis indicated that TaIAA15-3B was associated with plant height (Ph), spike length (SL) and 1 000-grain weight (TGW) in wheat, and Hap-II of TaIAA15-3B was the most favored allele and selected by modern breeding in China.  This study sheds light on the role of auxin signaling on wheat plant architecture as well as yield related traits.
Keywords:  wheat       auxin       plant architecture       TaIAA15       haplotypes  
Received: 14 August 2020   Accepted: 22 October 2020
Fund: This study was supported by the National Basic Research Program of China (2016YFD0100102 and 2016YFD0100302).
About author:  Correspondence REN Zheng-long, E-mail:; JIA Ji-zeng, E-mail: * These authors contributed equally to this study.

Cite this article: 

LI Fu, YAN Dong, GAO Li-feng, LIU Pan, ZHAO Guang-yao, JIA Ji-zeng, REN Zheng-long. 2022. TaIAA15 genes regulate plant architecture in wheat. Journal of Integrative Agriculture, 21(5): 1243-1252.

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