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基于微卫星和小卫星DNA标记对胎生岩蜥单性生殖物种基因变异和种群间分化的定量评估

[Quantitative evaluation of gene variation and interpopulation differentiation of parthenogenetic species of Darevskia lizards based on mini- and microsatellite DNA markers].

作者信息

Petrosian V G, Tokarskaia O N, Malysheva D N, Ryskov A P

机构信息

Severtsov Institute of Ecology and Evolution, Russian Academy of Sciences, Moscow, 117984 Russia.

出版信息

Genetika. 2003 Oct;39(10):1418-26.

Abstract

Methods of estimating within- and between-population gene diversity in parthenogenetic species using mini- and microsatellite DNA markers and modified Wright's FST statistic are presented with special reference to model populations of lizards of the genus Darevskia (D. dahli, D. armeniaca, D. unisexualis). We used DNA fingerprinting data for several populations of these species examined earlier. The effects of variation in M13, minisatellite, (GACA)n and (TCC)n microsatellite loci on the formation of within-population gene diversity in parthenogenetic species D. dahli and D. armeniaca were shown to be different. The equality of the realized gene diversity H and its maximum possible value Hmax in two populations of D. dahli (Hmax = 0.032, H = 0.031, P < < 0.0431; Hmax = 0.024, H = 0.027, P = 0.09) and D. armeniaca (Hmax = 0.05, H = 0.053, P = 0.03; Hmax = 0.054, H = 0.055, P = 0.02) suggests that variation in (GACA)n loci substantially contributes to the maintenance of within-population genetic diversity. Analysis of between-population genetic diversity using loci M13, (GACA)n, and (TCC)n showed differentiation of D. dahli populations from northeastern and northwestern Armenia (FST = 0.0272, P = 3 x 10(-13)) and genetic homogeneity of the Armenian and Introduced to the Ukraine populations of D. armeniaca characteristic of one clone (FST = 0, P = 1).

摘要

本文介绍了利用小卫星和微卫星DNA标记以及修正的赖特FST统计量来估计孤雌生殖物种群体内和群体间基因多样性的方法,并特别提及了达雷夫斯基属蜥蜴(D. dahli、D. armeniaca、D. unisexualis)的模型群体。我们使用了之前检测过的这些物种多个群体的DNA指纹数据。结果表明,M13、小卫星、(GACA)n和(TCC)n微卫星位点的变异对孤雌生殖物种D. dahli和D. armeniaca群体内基因多样性形成的影响有所不同。在D. dahli的两个群体中,实际基因多样性H与其最大可能值Hmax相等(Hmax = 0.032,H = 0.031,P << 0.0431;Hmax = 0.024,H = 0.027,P = 0.09),在D. armeniaca中也是如此(Hmax = 0.05,H = 0.053,P = 0.03;Hmax = 0.054,H = 0.055,P = 0.02),这表明(GACA)n位点的变异对维持群体内遗传多样性有重要贡献。利用M13、(GACA)n和(TCC)n位点对群体间遗传多样性进行分析,结果显示亚美尼亚东北部和西北部的D. dahli群体存在分化(FST = 0.0272,P = 3×10(-13)),而亚美尼亚的D. armeniaca群体以及引入乌克兰的属于同一克隆的群体具有遗传同质性(FST = 0,P = 1)。

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