研究论文

海水胁迫下黄秋葵种子发芽率的全基因组关联分析

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  • (南通大学生命科学学院,江苏 南通 226000)

收稿日期: 2025-09-04

  录用日期: 2025-09-29

  网络出版日期: 2026-02-28

基金资助

南通市社会民生科技计划项目(MS22021029);大学生创新创业训练计划项目(202410304109Y);南通大学大型仪器开放基金项目(KFJN2554)

Genome-Wide Association Study of Okra Seed Germination Rate under Seawater Stress Conditions

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  • (School of Life Sciences, Nantong University, Nantong 226000, Jiangsu China)

Received date: 2025-09-04

  Accepted date: 2025-09-29

  Online published: 2026-02-28

摘要

以不同来源的180份黄秋葵Abelmoschus esculentus种质资源为材料,对其种子进行3‰和6‰盐度海水处理,测定发芽率及相对发芽率,并与SNP标记进行全基因组关联分析(GWAS),结合转录组测序(RNA-seq)筛选耐盐候选基因。结果表明,3‰和6‰盐度海水对黄秋葵种子发芽率均产生不同程度的抑制作用。GWAS共筛选出75个与耐盐性状显著相关的SNP位点。在54号染色体上检测到一个关联区间,该区间有4个SNP位点在3‰和6‰盐度海水胁迫下均被同时检测到,是控制相对发芽率耐盐性的重要位点,4个SNP上下游100 kb范围内共有54个注释基因。利用黄秋葵苗期海水胁迫转录组测序数据,筛选出6个差异表达基因作为海水胁迫下黄秋葵耐盐性的候选基因,分别为Ae54G020550、Ae54G020570、Ae54G020630、Ae54G020730、Ae54G020810和Ae54G020890,注释功能分别为细胞骨架组成结构、编码CYSTM蛋白、NPH3或BTB/POZ蛋白、醇脱氢酶、富含亮氨酸的重复序列及PPR家族蛋白。研究结果为分析黄秋葵耐盐基因的功能及其耐盐性分子机制提供参考。

本文引用格式

华鑫涛, 汤子祺, 杨 芸, 张 妍, 李慧雯, 李奕莹, 束杨培, 孙 健, 谢冬微 . 海水胁迫下黄秋葵种子发芽率的全基因组关联分析[J]. 亚热带植物科学, 2026 , 55(1) : 12 -26 . DOI: 10.3969/j.issn.1009-7791.2026.01.002

Abstract

To explore the candidate genes related to salt tolerance in okra under seawater stress, 180 okra (Abelmoschus esculentus) germplasm resources from various sources were used as materials, and the seeds were treated with seawater at 3‰ and 6‰ salinity. The germination percentage and relative germination percentage were measured, genome-wide association study (GWAS) was performed with SNP markers, and candidate gene screening was performed by transcriptome sequencing (RNA-seq). The results showed that 3‰ and 6‰ salinity of seawater had different degrees of inhibition on the germination rate of okra seeds. A total of 75 SNP loci were screened out by GWAS. An association interval was detected on chromosome 54, and four SNP loci were detected simultaneously under seawater stress of 3‰ and 6‰ salinity, which were important loci for controlling the relative germination rate and salt tolerance, and a total of 54 annotated genes were detected within 100 kb of the upstream and downstream of the four SNPs. Based on the results of transcriptome sequencing under seawater stress at the seedling stage of okra, six differentially expressed genes were screened out as candidate genes for salt tolerance of okra under seawater stress, namely Ae54G020550, Ae54G020570, Ae54G020630, Ae54G020730, Ae54G020810 and Ae54G020890, and the annotation functions were cytoskeletal composition, encoding CYSTM protein, NPH3 or BTB/POZ protein, alcohol dehydrogenase, leucine-rich repeats, and PPR family proteins. These results provide a reference for analyzing the function of salt tolerance genes in okra and the molecular mechanism of salt tolerance.

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