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首页> 美国卫生研究院文献>Evolutionary Applications >Population genomic data in spider mites point to a role for local adaptation in shaping range shifts
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Population genomic data in spider mites point to a role for local adaptation in shaping range shifts

机译：蜘蛛螨中的人口基因组数据指向局部适应整形范围的作用

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Local adaptation is particularly likely in invertebrate pests that typically have short generation times and large population sizes, but there are few studies on pest species investigating local adaptation and separating this process from contemporaneous and historical gene flow. Here, we use a population genomic approach to investigate evolutionary processes in the two most dominant spider mites in China, Tetranychus truncatus Ehara and Tetranychus pueraricola Ehara et Gotoh, which have wide distributions, short generation times, and large population sizes. We generated genome resequencing of 246 spider mites mostly from China, as well as Japan and Canada at a combined total depth of 3,133×. Based on demographic reconstruction, we found that both mite species likely originated from refugia in southwestern China and then spread to other regions, with the dominant T. truncatus spreading ~3,000 years later than T. pueraricola. Estimated changes in population sizes of the pests matched known periods of glaciation and reinforce the recent expansion of the dominant spider mites. T. truncatus showed a greater extent of local adaptation with more genes (76 vs. 17) associated with precipitation, including candidates involved in regulation of homeostasis of water and ions, signal transduction, and motor skills. In both species, many genes (135 in T. truncatus and 95 in T. pueraricola) also showed signatures of selection related to elevation, including G‐protein‐coupled receptors, cytochrome P450s, and ABC‐transporters. Our results point to historical expansion processes and climatic adaptation in these pests which could have contributed to their growing importance, particularly in the case of T. truncatus.
机译：局部适应特别可能是无脊椎动物的害虫，通常具有较短的发电时间和大群尺寸，但仍有关于研究局部适应并从同期和历史基因流中分离此过程的害虫物种的研究。在这里，我们使用人口基因组方法来调查中国两种最多占优势蜘蛛螨的进化过程，Tetranychus truncatus ehara和Tetranychus pueraricola ehara et gotoh，它具有广泛的分布，短发电时间和大群尺寸。我们主要来自中国的246个蜘蛛螨的基因组重构，以及日本和加拿大的总深度为3,133×。基于人口重建，我们发现，两种螨类可能来自中国西南部的避难所，然后蔓延到其他地区，占T.Truncatus在T. Pueraricola之后的〜3,000年延迟。人口尺寸的估计变化匹配已知的已知冰川阶段，并加强了最近的主要蜘蛛螨的扩展。 T.Truncatus在与沉淀相关的更多基因（76对17）的局部基因（76对17）的局部适应程度，包括参与水和离子的稳态，信号转导和运动技能的候选者。在这两个物种中，许多基因（135 in T.Truncatus和95中T.Pueraricola）也显示出与升高有关的选择签名，包括G蛋白偶联受体，细胞色素P450和ABC-转运蛋白。我们的结果指出了这些遗体的历史扩张过程和气候适应，这可能导致其越来越重要，特别是在T.Truncatus的情况下。

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