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首页> 外文期刊>The Herpetological journal >Genetic variation within and between four chromosomal races of Liolaemus monticola in Chile
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Genetic variation within and between four chromosomal races of Liolaemus monticola in Chile

机译：智利褐毛猩猩四个染色体小种内和之间的遗传变异

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摘要

Allozyme variability was assessed within and between 18 samples of four chromosomal races of the Liolaemus monticola complex: "Southern, 2n=34", "Northern, 2n=38-40", "Multiple Fission, 2n=42-44" and "Northern modified 1, 2n=38-40". This is an endemic montane Chilean lizard characterized by extensive chromosomal polytypy. The population genetic structure was studied by means of allozyme electrophoresis of 20 presumptive loci. Population heterogeneity analysis carried out by the estimation of Weir and Cockerham's F-statistic (theta), demonstrated substantial genetic differentiation among populations. The u-statistic, genetic distance data and multivariate analyses show that genetic variation is distributed into geographically coherent population groups in accordance with three of the four chromosome races. The greatest differentiation occurs between all populations of the "Southern, 2n=34" race and a second group that includes all populations from the "Northern, 2n=38-40" plus "Northern mod 1, 2n=38-40" races, separated from the "Multiple Fissions, 2n=42-44" race. As riverine barriers also separate these chromosomal races, we do not attribute the observed differentiation to isolation-by-distance or the chromosome characterization for each race. Possible routes of migration and colonization are proposed.
机译：评估了四个异种Liolaemus monticola复合体的18个样本之内和之间的同工酶变异性：“南部，2n = 34”，“北部，2n = 38-40”，“多重裂变，2n = 42-44”和“北部修改为1，2n = 38-40“。这是一种地方性的智利山地蜥蜴，特征在于广泛的染色体多型性。通过20个推测基因座的同工酶电泳研究了种群的遗传结构。通过Weir和Cockerham的F统计量（theta）的估计进行的种群异质性分析表明，种群之间存在显着的遗传分化。 u统计，遗传距离数据和多变量分析表明，遗传变异是根据四个染色体种族中的三个种族分布到地理上一致的群体中的。最大的区别发生在“南部2n = 34”种族的所有人群和第二组，其中包括“北部2n = 38-40”加上“北部mod 1，2n = 38-40”种族的所有人群，与“多重分裂，2n = 42-44”种族分开。由于河道屏障也将这些染色体种族分开，因此我们不会将观察到的差异归因于每个种族的按距离隔离或染色体表征。提出了可能的迁移和定殖途径。

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