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Natural variation of indels in the CTB3 promoter confers cold tolerance in japonica rice

文献类型: 外文期刊

作者: Li, Jin 1 ; Guo, Haifeng 1 ; Lou, Qijin 1 ; Zeng, Yawen 2 ; Guo, Zhenhua 3 ; Xu, Penghui 1 ; Gu, Yunsong 1 ; Gao, Shilei 1 ; Xu, Bingxia 1 ; Han, Shichen 1 ; Su, Runbin 1 ; Zou, Andong 1 ; Ye, Wei 1 ; Zhang, Meng 1 ; Li, Yingxiu 1 ; Sun, Xingming 1 ; Zhang, Zhanying 1 ; Zhang, Hongliang 1 ; Ma, Wendong 3 ; Chen, Chao 4 ; Li, Zichao 1 ; Li, Jinjie 1 ;

作者机构: 1.China Agr Univ, Frontiers Sci Ctr Mol Design Breeding, Key Lab Crop Heterosis Utilizat MOE, Beijing Key Lab Crop Genet Improvement,Coll Agron, Beijing 100193, Peoples R China

2.Yunnan Acad Agr Sci, Biotechnol & Genet Resources Inst, Kunming 650205, Peoples R China

3.Heilongjiang Acad Agr Sci, Rice Res Inst, Jiamusi 154026, Peoples R China

4.China Natl Seed Grp Co LTD, Life Sci & Technol Ctr, State Key Lab Crop Germplasm Innovat & Mol Breedin, Wuhan 430206, Peoples R China

期刊名称:NATURE COMMUNICATIONS ( 影响因子:15.7; 五年影响因子:17.2 )

ISSN:

年卷期: 2025 年 16 卷 1 期

页码:

收录情况: SCI

摘要: Improvement of cold tolerance at the booting stage (CTB) in rice is a key strategy for cultivation in high-altitude and high-latitude regions. Here, we identify CTB3 gene, encoding a calmodulin-binding transcriptional activator that positively regulates cold tolerance at the booting stage in japonica rice. Two indels (57-bp and 284-bp) in the CTB3 promoter confer a differential transcriptional response to cold between the japonica and indica subspecies. OsTCP19 suppresses CTB3 expression by binding to these indels, negatively regulating cold tolerance. CTB3 activates the expression of TREHALOSE-6-PHOSPHATE PHOSPHATASE1 (OsTPP1), reducing trehalose 6-phosphate (Tre6P) levels, which increases sugar accumulation in panicles and improves cold tolerance. Additionally, favorable alleles of OsTCP19 and CTB3 are selected in japonica rice for cold adaptation. These findings highlight the important role of CTB3 in cold adaptation and its potential for improving cold tolerance in rice breeding.

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