草地学报 ›› 2026, Vol. 34 ›› Issue (3): 779-787.DOI: 10.11733/j.issn.1007-0435.2026.03.004

• 研究论文 • 上一篇    

高原鼢鼠不同地理种群MHC-DRB基因外显子2遗传多样性分析

龚俊强1,2, 侯齐琪1,2, 欧克杰1,2, 郝彪彪1,2, 王文碧1,2, 苏军虎1,2,3   

  1. 1. 甘肃农业大学草业学院/草业生态系统教育部重点实验室/甘肃省草业工程实验室/中美草地畜牧业可持续发展研究中心, 甘肃 兰州 730070;
    2. 甘肃农业大学-新西兰梅西大学草地生物多样性研究中心, 甘肃 兰州 730070;
    3. 甘肃祁连山草原生态系统观测研究站, 甘肃 武威 733200
  • 收稿日期:2025-03-31 修回日期:2025-05-26 发布日期:2026-03-23
  • 通讯作者: 苏军虎,E-mail:sujh@gsau.edu.cn
  • 作者简介:龚俊强(1999-),男,汉族,甘肃宕昌人,硕士研究生,主要从事啮齿动物生态学与草地保护方面研究,E-mail:1741658013@qq.com;
  • 基金资助:
    甘肃省重点研发生态文明建设专项(24YFFA058);甘肃省草原健康和退化评估科技支撑项目(GSAU-JSFW-2024-139-1);国家自然科学基金项目(32272566)资助

Analysis of Genetic Diversity of Different Geographic Populations of Eospalax baileyi Based on MHC-DRB Exon 2 Gene

GONG Jun-qiang1,2, HOU Qi-qi1,2, OU Ke-jie1,2, HAO Biao-biao1,2, WANG Wen-bi1,2, SU Jun-hu1,2,3   

  1. 1. School of Grassland, Gansu Agricultural University/Key Laboratory of Grassland Ecosystem, Ministry of Education of Gansu Province/Gansu Provincial Grassland Engineering Laboratory/Center for Sustainable Development of Grassland Animal Husbandry of China and the United States, Lanzhou, Gansu Province 730070, China;
    2. Center for Grassland Biodiversity Research, Gansu Agricultural University-Mercy University, Lanzhou, Gansu Province 730070, China;
    3. Gansu Qilianshan Grassland Ecosystem Observation and Research Station, Wuwei, Gansu Province733200, China
  • Received:2025-03-31 Revised:2025-05-26 Published:2026-03-23

摘要: 为了解高原鼢鼠(Eospalax baileyi)不同地理种群的遗传多样性和适应性进化机制,本文对高原鼢鼠8个不同地理种群121只个体的MHC-DRB基因外显子2进行PCR扩增及克隆。结果发现,高原鼢鼠MHC-DRB基因外显子2具有较高的多态性,种群间遗传分化明显,地理隔离是各种群分化的关键因素,碱基使用方面存在密码子偏好性,中性检测表明高原鼢鼠种群近期未发生过种群扩张现象,且维持遗传多态性的驱动力主要为选择作用。本研究结果将为进一步研究高原鼢鼠的MHC基因的遗传适应性和种群有效管理提供理论依据。

关键词: 高原鼢鼠, MHC-DRB外显子2, 多态性, 遗传多样性, 选择作用

Abstract: To elucidate the genetic diversity and adaptive evolutionary mechanisms of different geographical populations of the plateau zokor (Eospalax baileyi), in this study PCR was conducted to amplify and clone the MHC-DRB gene exon 2 in 121 individuals from eight distinct geographical populations. The results showed that the MHC-DRB exon 2 of the plateau zokor exhibits high polymorphism, with significant genetic differentiation among populations. Geographical isolation was identified as the primary factor driving population divergence. Codon usage bias was observed in nucleotide composition. Neutral tests indicated that the plateau zokor population had not undergone recent expansion, and the maintenance of genetic polymorphism was primarily driven by natural selection. The findings of this study will provide a theoretical basis for further investigating the genetic adaptation of MHC genes in Eospalax baileyi and their effective population management.

Key words: Eospalax baileyi, MHC-DRB exon 2, Polymorphism, Genetic diversity, Selective effect

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