TaSED interacts with TaSPA synergistically regulating SDS-sedimentation volume in bread wheat
文献类型： 外文期刊
作者： Zhai, Shanshan 1 ; Zhang, Runqi 1 ; Meng, Xinhao 1 ; Liu, Guoyu 1 ; Yu, Jiazheng 1 ; Xu, Huanwen 2 ; Lou, Hongyao 3 ; Wen, Shidian 1 ; You, Mingshan 1 ; Xie, Chaojie 1 ; Liu, Jie 1 ; Ni, Zhongfu 1 ; Sun, Qixin 1 ; Li, Baoyun 1 ;
作者机构： 1.China Agr Univ, Coll Agron & Biotechnol, Beijing 100193, Peoples R China
2.Wenzhou Acad Agr Sci, Wenzhou Vocat Coll Sci & Technol, Southern Zhejiang Key Lab Crop Breeding, Wenzhou 325006, Peoples R China
3.Beijing Acad Agr & Forestry Sci, Beijing 100097, Peoples R China
关键词：
haplotype analysis; QTL; SDS-sedimentation volume; storage proteins;
期刊名称：JOURNAL OF INTEGRATIVE PLANT BIOLOGY （ 影响因子：9.3； 五年影响因子：10.8 ）
ISSN： 1672-9072
年卷期： 2025 年 67 卷 8 期
页码：
收录情况： SCI
摘要： The SDS-sedimentation volume (SSV) is a critical indicator for assessing wheat gluten quality and is widely used when evaluating wheat processing quality. However, the molecular mechanisms regulating SSV remain poorly understood. In this study, we performed an analysis of quantitative trait loci (QTLs) for SSV using a recombinant inbred line (RIL) population derived from a cross between TAA10 and XX329, and identified four environmentally stable QTLs located on chromosomes 1D, 2D, 4D, and 6D. Among them, the effects of Qssv.cau-1D and Qssv.cau-6D were likely to be explained by genome variations at the Glu-D1 and Gli-D2 loci. We fine mapped Qssv.cau-2D to the candidate causal gene TaSED, encoding a nucleolar protein. Gene-edited TaSED knockout mutants (tased) had a lower SSV, while TaSED overexpression lines showed a higher SSV. We demonstrated that TaSED interacted with the transcription factor TaSPA to enhance its transcriptional activation activity of glutenin and gliadin, whose expression was downregulated in tased and upregulated in TaSED-OE plants, with corresponding differences in glutenin and gliadin content compared with the wild-type. A molecular marker sedTX was further developed based on a nonsynonymous mutation of the parents in TaSED that could be used to identify haplotypes with high SSV effectively. Our findings elucidate a molecular mechanism governing SSV and reveal valuable variants with promising applications for improving wheat quality.
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