数字农科院2.0

Genome-wide association study of image-based trait reveals the genetic architecture of dark-induced leaf senescence in rice

文献类型： 外文期刊

作者： Li, Chao;Wu, Xiaoyuan;Wang, Pengna;Wang, Hongru;Wang, Lidong;Sun, Fang;Lu, Cheng;Hao, Huaiqing;Chu, Chengcai;Jing, Hai-Chun

作者机构：

关键词： Dark-induced leaf senescence (DILS);genome-wide association study (GWAS);onset;progression;OsMYB21;OsSUB1B

期刊名称： JOURNAL OF EXPERIMENTAL BOTANY

ISSN： 0022-0957

年卷期： 2024 年

页码：

收录情况： SCIE（2024版）

摘要： Darkness is often used as an effective measure to induce leaf senescence. Although many senescence-related genes in rice have been reported, the genome-wide genetic architecture underlying leaf senescence remains poorly understood. In our study, indica and japonica rice showed contrasting responses to dark-induced leaf senescence (DILS). Genome-wide association studies (GWAS) combined with transcriptomic analyses revealed 57, 97, and 48 loci involved in the regulation of the onset, progression, and ending of DILS, respectively. Haplotype analyses showed that the senescence-related loci differentially accumulated in indica and japonica accessions and functioned additively to regulate DILS. A total of 357 candidate genes were identified that are involved in various senescence-related processes such as lipid and amino acid catabolism, photosynthesis, response to reactive oxygen species, and regulation of defence response. In addition, functional analyses of candidate genes revealed that OsMYB21 positively regulates the onset of DILS, while OsSUB1B negatively regulates its progression. Thus, our results provide new insights into the genetic regulation of DILS in rice.

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