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首页> 外文期刊>Biological Journal of the Linnean Society >Range-wide population structure of European sea bass Dicentrarchus labrax
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Range-wide population structure of European sea bass Dicentrarchus labrax

机译：欧洲鲈鱼Dicentrarchus labrax的全范围种群结构

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The euryhaline European sea bass Dicentrarchus labrax L., inhabiting the coasts of the eastern Atlantic Ocean and Mediterranean Sea, has had many opportunities for differentiation throughout its large natural range. However, evidence for this has been incompletely documented geographically and with an insufficient number of markers. Therefore, its full range was sampled at 22 sites and individuals were genotyped with a suite of mapped markers, including 14 microsatellite loci (N=536) and 46 neutral or gene-linked single nucleotide polymorphisms (SNPs; N=644). We confirm that the Atlantic and Mediterranean basins harbour two distinct lineages. Within the Atlantic Ocean no pattern was obvious based on the microsatellite and SNP genotypes, except for a subtle difference between South-eastern and North-eastern Atlantic sea bass attributed to limited introgression of alleles of Mediterranean origin. SNP genotypes of the Mediterranean lineage differentiated into three groups, probably under the influence of geographical isolation. The Western Mediterranean group showed genetic homogeneity without evidence for outlier loci. The Adriatic group appeared as a distinct unit. The Eastern Mediterranean group showed a longitudinal gradient of genotypes and most interestingly an outlier locus linked to the somatolactin gene. Overall, the spatial pattern fits those observed with other taxa of between-basin segregation and within-basin connectivity, which concurs well with the swimming capabilities of European sea bass. Evidence from a few outlier loci in this and other studies encourages further exploration of its regional connectivity and adaptive evolution.
机译：栖息在大西洋东部和地中海沿岸的欧洲鲈鱼欧洲鲈鱼Dicentrarchus labrax L.在其广阔的自然范围内拥有许多分化的机会。但是，关于这一点的证据在地理上没有完整记录，并且标记数量不足。因此，在22个位点对它的全范围进行了采样，并用一套映射的标记对个体进行了基因分型，包括14个微卫星基因座（N = 536）和46个中性或基因连锁的单核苷酸多态性（SNPs; N = 644）。我们确认大西洋和地中海盆地包含两个不同的世系。在大西洋海域内，基于微卫星和SNP基因型没有明显的模式，除了东南大西洋和东北大西洋鲈鱼之间的细微差别是由于地中海等位基因的渗入有限。地中海沿袭的SNP基因型可分为三类，可能是由于地理隔离的影响。西地中海组显示出基因同质性，没有异常基因座的证据。亚得里亚海群以不同的单位出现。东地中海组显示出基因型的纵向梯度，最有趣的是与生长抑素基因相关的异常基因座。总体而言，空间格局与流域间隔离和流域内连通性的其他分类单元所观察到的相吻合，这与欧洲鲈鱼的游泳能力非常吻合。在本研究和其他研究中，来自几个异常基因座的证据鼓励进一步探索其区域连通性和适应性进化。

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