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首页> 外文期刊>Molecular ecology >Phylogenomics supports incongruence between ecological specialization and taxonomy in a charismatic clade of buck moths
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Phylogenomics supports incongruence between ecological specialization and taxonomy in a charismatic clade of buck moths

机译：系统核糖核科学支持在魅力的降蛾的魅力思想中生态专业化和分类物之间的不协调

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Local adaptation can be a fundamental component of speciation, but its dynamics in relation to gene flow are not necessarily straightforward. Herbivorous taxa with localized host plant or habitat specialization across their geographic range are ideal models for investigating the patterns and constraints of local adaptation and its impact on diversification. The charismatic, day-flying moths of the Hemileuca maia species complex (Lepidoptera: Saturniidae) are such taxa, as they are geographically widespread, exhibit considerable ecological and morphological variability and host and habitat specificity, but apparently lack genetic differentiation across their range. Here, we use genomewide single nucleotide polymorphisms to assess relationships and population structure of this group across North America and investigate the scales where genomic divergence correlates with adaptive ecological characteristics. In contrast to previous genetic studies of the group, we find broad- and fine-scale genetic differentiation between lineages, which is at odds with various levels of taxonomic description and recognition of conservation units. Furthermore, ecological specialization only explains some fine-scale genetic differentiation, and across much of the group's range, local adaptation is apparently occurring in the face of strong gene flow. These results provide unprecedented insight into drivers of speciation in this group, the relationship between taxonomy and genomics-informed species boundaries and conservation management of internationally protected entities. Broadly, this system provides a model for understanding how local adaptation in an herbivore can arise and be maintained in the face of apparently strong gene flow, and the importance of geographic isolation in generating genomic divergence, despite a lack of ecological divergence.
机译：局部适应可以是物种的基本组分，但它与基因流动相关的动态不一定是直截了当的。未食草的分类群，具有本地化的主体植物或地理范围的栖息地专业，是调查本地适应模式和限制的理想模型及其对多样化的影响。 Hemileuca Maia物种复合物（Lepidoptera：Saturniidae）的魅力，日飞蛾是这种分类群，因为它们在地理上普遍存在，表现出相当大的生态和形态变异性和宿主和栖息地特异性，但显然缺乏围绕其范围的遗传分化。在这里，我们使用基因组单核苷酸多态性来评估北美的该组织的关系和人口结构，并调查基因组偏差与适应性生态特征相关的尺度。与对本集团的先前遗传研究相比，我们在谱系之间​​发现了广泛和细微的遗传分化，这与各种水分分类描述和保护单位的识别有所不同。此外，生态专业化仅解释了一些细尺的遗传分化，并且在大部分群体的范围内，局部适应在强烈的基因流动面上显然发生。这些结果对本集团的资格驱动程序提供了前所未有的洞察力，分类学与基因组学的关系 - 知情的物种界限和国际受保护实体的保护管理。广泛地，该系统提供了一种模型，用于了解食草动物中的局部适应如何在明显强烈的基因流动中保持和维持，以及由于缺乏生态分歧，地理分离在产生基因组发散时的重要性。

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