Genetic differentiation over a small spatial scale in the smooth newt (Lissotriton vulgaris)

IF 1.1 4区 生物学 Q3 ZOOLOGY Herpetological Journal Pub Date : 2021-04-01 DOI:10.33256/31.2.6169
Z. Tóth, Fanni Mihók, E. Nemesházi
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引用次数: 2

Abstract

Understanding the distribution of genetic variation is central for both population biology and conservation genetics. Genetic population structure can be primarily affected by the species’ dispersal ability, which is assumed to be limited in many amphibians. In this study, we estimated allelic differentiation metrics and FST indices to investigate genetic variation among natural breeding ponds of smooth newts (Lissotriton vulgaris) over a small spatial scale. Based on six microsatellite loci, we found a small, but significant allelic differentiation among clusters of natural breeding ponds (i.e. ‘local regions’), which result was in line with the calculation of corresponding hierarchical FST values. Analysis of molecular variance also indicated significant between-region variation in the study area. Pairwise estimations showed that only the furthermost regions differed from each other in both differentiation measures, but this difference was not attributable to geographic distances between ponds. Our results provide evidence that hierarchical genetic structure can be characteristic to breeding ponds of smooth newts on a small spatial scale in their natural breeding habitat, but dispersal distance may be less limited than previously thought in these philopatric caudates.
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光滑蝾螈在小空间尺度上的遗传分化
了解遗传变异的分布是种群生物学和保护遗传学的核心。遗传种群结构主要受物种扩散能力的影响,许多两栖动物的扩散能力被认为是有限的。在本研究中,我们估计了等位基因分化指标和FST指数,以在小空间尺度上研究光滑蝾螈(Lissotriton vulgaris)自然繁殖池之间的遗传变异。基于6个微卫星基因座,我们发现天然养殖池塘集群(即“局部区域”)之间存在微小但显著的等位基因分化,这一结果与相应等级FST值的计算结果一致。分子方差分析还表明,研究区域的区域间差异显著。成对估计表明,只有最远的地区在两种分化指标上都不同,但这种差异不是由于池塘之间的地理距离造成的。我们的研究结果提供了证据,证明在光滑蝾螈的自然繁殖栖息地,在小的空间范围内,分级遗传结构可能是其繁殖池的特征,但在这些文献记载的尾状蝾螈中,传播距离可能没有以前认为的那么有限。
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来源期刊
Herpetological Journal
Herpetological Journal 生物-动物学
CiteScore
2.40
自引率
10.00%
发文量
25
审稿时长
>12 weeks
期刊介绍: The Herpetological Journal is the Society''s prestigious quarterly scientific journal.
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