The OsRqc1-OsVms1 module regulates the temperature threshold in thermo-sensitive genic male-sterile rice lines
文献类型： 外文期刊
作者： Zhou, Can 1 ; Yan, Bin 1 ; Liu, Chunyan 1 ; Sun, Jing 1 ; Yang, Yuanzhu 5 ; Cao, Xiaofeng 1 ;
作者机构： 1.Chinese Acad Sci, Inst Genet & Dev Biol, Lab Adv Breeding Technol, Beijing 100101, Peoples R China
2.Chinese Acad Sci, Inst Genet & Dev Biol, Key Lab Seed Innovat, Beijing 100101, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100039, Peoples R China
4.Beijing Acad Agr & Forestry Sci, Inst Biotechnol, Beijing Key Lab Agr Genet Resources & Biotechnol, Beijing 100097, Peoples R China
5.Yuan Longping High Tech Agr Co Ltd, Changsha 410125, Peoples R China
6.Minist Agr & Rural Affairs, Key Lab Rice Germplasm Enhancement Southern China, Changsha 410001, Hunan, Peoples R China
7.Yuelushan Lab, Changsha 410128, Peoples R China
关键词： critical sterility-inducing temperature; ribosome-associated quality control; OsRqc1-OsVms1 module; tRNA; natural variations
期刊名称：SCIENCE CHINA-LIFE SCIENCES （ 影响因子：9.5； 五年影响因子：8.1 ）
ISSN： 1674-7305
年卷期： 2025 年
页码：
收录情况： SCI
摘要： Thermo-sensitive genic male-sterile (TGMS) lines are fertile at lower temperatures but male sterile above a critical sterility-inducing temperature (CSIT), which varies substantially across TGMS lines. Such lines are valuable resources for breeding two-line hybrid rice (Oryza sativa). However, as their utility is restricted by the CSIT, understanding its regulatory mechanisms has crucial breeding-associated implications. The thermo-sensitive genic male sterility 5 (tms5) mutation is common to most TGMS lines. We previously revealed that tms5 mutants failed to recycle cyclic phosphate (cP)-containing Delta CCA-tRNAs, particularly in pollen mother cells, resulting in fewer mature tRNAs, thereby causing TGMS. However, the CSIT-regulatory network in the tms5 lines remains unelucidated. Here, we characterized the CSIT-related ribosome-associated quality control 1 (OsRqc1) gene. OsRqc1 binds to the 60S ribosomal subunits and functions in ribosome-associated quality control. It also regulates the CSIT in tms5 lines by assisting OsVms1 in recruiting these subunits to generate cP-Delta CCA-tRNAs. Variations in a 6-bp repeat in the 5 ' untranslated region of OsRqc1 in rice subspecies affect its transcription, thereby altering the CSIT in tms5 lines. These findings reveal the role of an OsRqc1-OsVms1 module in regulating CSIT, providing valuable insights into genetic variations in OsRqc1. Such results may facilitate the molecular breeding of rice two-line hybrid tms5 lines with specific CSITs, which can adapt to regions with different environments.
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