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Your Position :Home->Past Journals Catalog->2022 Vol.41 No.3

A Preliminary Study on Population Genetic Structure of Trogloneta yunnanense
Author of the article:LIU Shiliang1,2, LIN Yucheng1,2*
Author's Workplace:1. Key Laboratory of Bio-Resource and Eco-Environment of Ministry of Education, College of Life Sciences, Sichuan University, Chengdu 610065, China;
2. Sichuan Key Laboratory of Conservation Biology on Endangered Wildlife, College of Life Sciences, Sichuan University, Chengdu 610065, China
Key Words:Trogloneta yunnanense; COⅠ gene; haplotype; gene flow; population genetic differentiation; genetic diversity
Abstract:Trogloneta yunnanense (Song & Zhu, 1994) is a cave-dwelling spider that lives on the Yunnan-Guizhou Plateau. To explore the population structure and genetic diversity of T. yunnanense, a preliminary study was carried out on the mitochondrial COⅠ gene sequences of 159 individual specimens from 6 cave populations. The results showed that:1) sixteen haplotypes were detected in 159 individuals, and no haplotypes were shared among the populations. The patterns of genetic diversity were high in general, low within each population, high in haplotype diversity, and low in nucleotide diversity; 2) The genetic differentiation of T. yunnanense was significant among populations, and little variation within each population. The FST values between populations were above 0.9 (P<0.01) with weak gene flow (Nm=0.01). The inter-population variation accounted for 95.75% of the total variation, while the intra-population variation accounted for only 4.25%; 3) The results of neutral test and nucleotide mismatch distribution test showed that T. yunnanense did not experience population expansion, and the population size remained stable. It is speculated that cave isolation and extreme subterranean environmental conditions may contribute to maintaining the stability of the population sizes and promoting the genetic differentiation among populations of T. yunnanense.
2022,41(3): 256-263 收稿日期:2022-01-23
分类号:Q959.22; Q953+.1
基金项目:国家自然科学基金项目(31972870;31772410)
作者简介:刘世梁,男,硕士研究生,主要从事蜘蛛系统学和动物种群遗传学研究,E-mail:slliu2021@126.com
*通信作者:林玉成,教授,主要从事无脊椎动物系统学、洞穴生物学等研究,E-mail:linyucheng@scu.edu.cn
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