生物技术通报 ›› 2024, Vol. 40 ›› Issue (9): 212-224.doi: 10.13560/j.cnki.biotech.bull.1985.2024-0276

• 研究报告 • 上一篇    下一篇

基于转录组和WGCNA筛选大葱雄性不育相关基因

岳丽昕(), 王清华, 刘泽洲, 孔素萍, 高莉敏()   

  1. 山东省农业科学院蔬菜研究所 国家蔬菜改良中心山东分中心 山东省设施蔬菜生物学重点实验室 农业部黄淮地区蔬菜科学观测实验站(山东),济南 250100
  • 收稿日期:2024-03-21 出版日期:2024-09-26 发布日期:2024-10-12
  • 通讯作者: 高莉敏,女,硕士,副研究员,研究方向:蔬菜遗传育种;E-mail: lmgao1201@163.com
  • 作者简介:岳丽昕,女,博士,助理研究员,研究方向:蔬菜遗传育种;E-mail: yuelixin.happy@163.com
  • 基金资助:
    山东省重点研发计划(2023TZXD071);山东省蔬菜产业技术体系(SDAIT-05);山东省农业科学院农业科技创新工程(CXGC2024F08);山东省农业科学院农业科技创新工程(CXG2023A07)

Screening Genes Related to Male Sterile in Welsh Onion(Allium fistulosum L.) Based on Transcriptomic Profiling and WGCNA

YUE Li-xin(), WANG Qing-hua, LIU Ze-zhou, KONG Su-ping, GAO Li-min()   

  1. Shandong Key Laboratory of Greenhouse Vegetable Biology, Shandong Branch of National Vegetable Improvement Center, Huanghuai Region Vegetable Scientific Station of Ministry of Agriculture(Shandong), Institute of Vegetables, Shandong Academy of Agricultural Sciences, Jinan 250100
  • Received:2024-03-21 Published:2024-09-26 Online:2024-10-12

摘要:

【目的】挖掘大葱雄性不育相关的特异性模块并筛选核心基因,为后续深入解析大葱雄性不育分子机制提供理论依据。【方法】以大葱可育株MF和不育株MS不同发育时期的花蕾为研究对象,基于转录组测序和加权基因共表达网络分析(weighted gene co-expression network analysis,WGCNA),鉴定与大葱雄性不育相关的特异性模块,筛选核心基因。【结果】通过WGCNA分析,将8 320个基因划分为18个共表达模块,获得3个与大葱不育株MS花粉败育高度相关的特异性模块(blue、midnightblue和black模块)。功能富集分析表明,大葱不育株MS的花粉败育与苯丙素生物合成、角质和蜡质生物合成、淀粉和蔗糖代谢、α-亚油酸代谢和脂肪酸延长等多种代谢过程密切相关。根据模块内基因的连接度以及基因意义,鉴定得到atpBTPS9TPD1BHLH35等核心基因,可能在大葱花粉发育中起关键调控作用。实时荧光定量PCR(quantitative real-time polymerase chain reaction, RT-qPCR)结果显示,核心基因的表达量在MF和MS不同发育时期的花蕾中差异显著,且表达趋势与转录组学测序结果一致。【结论】鉴定了3个与大葱花粉败育高度相关的特异性模块,筛选到atpBTPS9TPD1等大葱花粉发育相关的核心基因,并发现大葱花粉败育主要涉及苯丙素生物合成、角质和蜡质生物合成、淀粉和蔗糖代谢、α-亚油酸代谢和脂肪酸延长等过程。

关键词: 大葱, 雄性不育, 加权基因共表达网络分析, 转录组测序, 核心基因

Abstract:

【Objective】The aim of this study is to identify the co-expression modules of male sterile Welsh onion(Allium fistulosum L.)and to screen key hub genes, so as to provide deeper insights into the molecular mechanisms of male sterile in the Welsh onion. 【Method】Twenty-four cDNA libraries were constructed and sequenced for different development stages of flower buds from the male-sterile(MS)plants and male-fertile(MF)plants. Then weighted gene co-expression network analysis(WGCNA)was performed to reveal the key modules and hub genes. 【Result】A total of eighteen co-expression modules were identified based on 8,320 genes, among which three modules(blue, midnightblue, and black)were significantly correlated with pollen abortion of the MS plant. Functional enrichment analysis suggested that several pathways associated with the “phenylpropanoid biosynthesis” “cutin, suberine, and wax biosynthesis” “starch and sucrose metabolism” “alpha-linolenic acid metabolism” and “fatty acid elongation” were found to be involved in pollen abortion of the MS plant. By considering gene significance and intramodular connectivity, several hub genes including atpB, TPS9, TPD1, and BHLH35, were identified, which might play key roles in pollen development of the Welsh onion. Then hub genes related to pollen development response were verified for quantitative real-time PCR(RT-qPCR)analysis, and the expression patterns of RNA-Seq and RT-qPCR were very consistent. 【Conclusion】Three key modules of male sterile Welsh Onion are obtained, and hub genes like atpB, TPS9, and TPD1 are identified. It is found that the pollen abortion of the MS plant mainly is involved the processes of phenylpropanoid biosynthesis, cutin, suberine, and wax biosynthesis, starch and sucrose metabolism, alpha-Linolenic acid metabolism, and fatty acid elongation.

Key words: Welsh onion, male sterile, weighted gene co-expression network analysis, RNA-Seq, hub gene