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TaGSNE, a WRKY transcription factor, overcomes the trade-off between grain size and grain number in common wheat and is associated with root development

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Title TaGSNE, a WRKY transcription factor, overcomes the trade-off between grain size and grain number in common wheat and is associated with root development
 
Creator Khan, Nadia
Yanfei Zhang
Jingyi Wang
Yuying Li
Xin Chen
Lili Yang
Jie Zhang
Chaonan Li
Long Li
Shoaib-ur-Rehman
Reynolds, Matthew P.
Lichao Zhang
Zhang, Xueyong
Xinguo Mao
Ruilian Jing
 
Subject grain
yields
haplotypes
wheat
roots
 
Description Wheat is one of the world’s major staple food crops, and breeding for improvement of grain yield is a priority under the scenarios of climate change and population growth. WRKY transcription factors are multifaceted regulators in plant growth, development, and responses to environmental stimuli. In this study, we identify the WRKY gene TaGSNE (Grain Size and Number Enhancer) in common wheat, and find that it has relatively high expression in leaves and roots, and is induced by multiple abiotic stresses. Eleven single-nucleotide polymorphisms were identified in TaGSNE, forming two haplotypes in multiple germplasm collections, named as TaGSNE-Hap-1 and TaGSNE-Hap-2. In a range of different environments, TaGSNE-Hap-2 was significantly associated with increases in thousand-grain weight (TGW; 3.0%) and spikelet number per spike (4.1%), as well as with deeper roots (10.1%) and increased root dry weight (8.3%) at the mid-grain-filling stage, and these were confirmed in backcross introgression populations. Furthermore, transgenic rice lines overexpressing TaGSNE had larger panicles, more grains, increased grain size, and increased grain yield relative to the wild-type control. Analysis of geographic and temporal distributions revealed that TaGSNE-Hap-2 is positively selected in China and Pakistan, and TaGSNE-Hap-1 in Europe. Our findings demonstrate that TaGSNE overcomes the trade-off between TGW/grain size and grain number, leading us to conclude that these elite haplotypes and their functional markers could be utilized in marker-assisted selection for breeding high-yielding varieties.
 
Date 2022-11-02
2023-03-03T15:58:49Z
2023-03-03T15:58:49Z
 
Type Journal Article
 
Identifier Khan, N., Zhang, Y., Wang, J., Li, Y., Chen, X., Yang, L., Zhang, J., Li, C., Li, L., Ur Rehman, S., Reynolds, M.P., Zhang, L., Zhang, X., Mao, X. and Jing, R. 2022. TaGSNE, a WRKY transcription factor, overcomes the trade-off between grain size and grain number in common wheat and is associated with root development. Journal of Experimental Botany, 73(19), 6678–6696.
0022-0957
1460-2431
https://hdl.handle.net/10568/129167
https://doi.org/10.1093/jxb/erac327
 
Language en
 
Rights Copyrighted; all rights reserved
Limited Access
 
Format p. 6678-6696
 
Publisher Oxford University Press (OUP)
 
Source Journal of Experimental Botany