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中国生物防治学报 ›› 2025, Vol. 41 ›› Issue (4): 745-751.DOI: 10.16409/j.cnki.2095-039x.2024.07.008

• 研究论文 • 上一篇    

七星瓢虫雄虫生殖系统精液蛋白基因的表达分析

程英, 周宇航   

  1. 贵州省农业科学院植物保护研究所, 贵阳 550006
  • 收稿日期:2024-07-19 发布日期:2025-08-15
  • 作者简介:程英,博士,副研究员,E-mail: chying2000@126.com。
  • 基金资助:
    国家自然科学基金(32460711);黔农科科技创新(2023-08号);黔农科院国基后补助项目(2021-45号)

Expression of Seminal Fluid Protein Genes of the Male Reproductive System in Coccinella septempunctata

CHENG Ying, ZHOU Yuhang   

  1. Institute of Plant Protection, Guizhou Academy of Agricultural Sciences, Guiyang 550006, China
  • Received:2024-07-19 Published:2025-08-15

摘要: 为明确七星瓢虫Coccinella septempunctata雄虫精液蛋白基因在性别间的表达差异并筛选出在雄虫生殖系统特异性表达的基因,从转录组数据库选取10个精液蛋白基因,采用实时荧光定量PCR技术检测其在七星瓢虫不同性别、组织及发育阶段的表达特征。结果显示,在七星瓢虫雄虫10个精液蛋白基因中,有5个精液蛋白基因(PGK、ENO、SDH、PLA2b、SHMT)的mRNA表达水平在雄虫中更高,其中PLA2b具有专一的雄虫生殖系统特异性,在雄虫生殖系统中的表达量是雌虫生殖系统的56.20倍。PGK、ENO、SDH、PLA2bSHMT在雄虫生殖系统的表达量分别是头部的1.63、5.90、2.63、10.14和1.23倍。PGK、ENO、SDHPLA2b在成虫期的表达量显著高于低龄幼虫期,其中SDHPLA2b在成虫期急剧上调表达,分别是卵期表达量的51.01倍和22.22倍,二者具有明显的发育阶段特异性。结果表明,SDHPLA2b基因可能参与七星瓢虫雄虫生殖作用。

关键词: 七星瓢虫, 精液蛋白基因, 雄虫生殖系统, 表达分析

Abstract: The expression differences of the seminal fluid protein gene of Coccinella septempunctata in different sexes, tissues, and developmental stages and the genes specifically expressed in the male reproductive system were detected using real-time fluorescence quantitative PCR technology from 10 seminal fluid protein genes selected from the transcriptome database. The results showed that among the 10 seminal protein genes in the male ladybug, 5 seminal protein genes (PGK, ENO, SDH, PLA2b, SHMT) had higher mRNA expression levels in males. Among them, PLA2b showed male reproductive system specificity, with expression level 56.20 times higher in the male than in the female. The expression levels of PGK, ENO, SDH, PLA2b and SHMT in the male reproductive system were 1.63, 5.90, 2.63, 10.14 and 1.23 times higher than those in the head, respectively. The expression levels of PGK, ENO, SDH and PLA2b in the adult stage were significantly higher than those in the young larval stage. Among them, SDH and PLA2b were sharply upregulated in the adult stage, with expression levels 51.01 and 22.22 times higher than those in the egg stage, respectively, showing obvious developmental stage specificity. The results indicate that the SDH and PLA2b genes may be involved in the reproductive function of male ladybird beetles.

Key words: Coccinella septempunctata, seminal fluid protein gene, male reproductive tract, gene expression

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