Genetic diversity varies with species traits and latitude in predatory soil arthropods (Myriapoda: Chilopoda)
Genetic diversity varies with species traits and latitude in predatory soil arthropods (Myriapoda: Chilopoda)
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DOI：
10.1111/geb.13709
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发表时间：
2023-06-02
影响因子：
6.4
通讯作者：
Joshi, Jahnavi
中科院分区：
文献类型：
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作者：
Bharti, D. K.;Pawar, Pooja Yashwant;Joshi, Jahnavi
目的：调查蜈蚣（一组古老的掠食性土壤节肢动物）种内遗传多样性的驱动因素。地点：亚洲、澳大利亚和欧洲。时间段：现在。研究的主要分类群：蜈蚣（纲：唇足类）。方法：我们建立了一个包含 1245 个线粒体细胞色素 C 氧化酶亚基 I 序列的数据库，代表来自唇足类所有五个目的 128 种蜈蚣。该序列数据集用于估计蜈蚣物种的遗传多样性，并将其分布与其他节肢动物群体的估计值进行比较。我们使用 beta 回归框架研究了蜈蚣遗传多样性随物种性状和生物地理学的变化，控制了一个科内共享进化历史的影响。结果：蜈蚣物种遗传多样性的巨大变化 (0- 0.1713) 落在节肢动物中值的高端。总体而言，蜈蚣线粒体 COI 遗传多样性变异的 27.57% 可以通过与生活史和生物地理学相关的预测因子的组合来解释。遗传多样性随着样本地点的体型大小和纬度位置而降低，在具有母性照顾的物种中遗传多样性更大，并随着同种间的地理距离而增加。 主要结论：蜈蚣的遗传多样性在节肢动物中处于较高端，这可能与其进化历史长和扩散能力低有关。在蜈蚣中，体型大小与遗传多样性的负相关可能是通过其对当地丰度的影响或生态策略对长期种群历史的影响来调节的。接受母性照顾的物种具有更高的遗传多样性，这与预期相反，需要进一步审查。半球遗传多样性的差异可能是由于历史上气候稳定和南半球季节性较低造成的。总的来说，我们发现，尽管动物之间的平均遗传多样性存在差异，但与生活史策略和生物地理学相关的相似过程与它们内部的变异有关。
Aim: To investigate the drivers of intra-specific genetic diversity in centipedes, a group of ancient predatory soil arthropods.Location: Asia, Australasia and Europe.Time Period: Present.Major Taxa Studied: Centipedes (Class: Chilopoda).Methods: We assembled a database of 1245 mitochondrial cytochrome c oxidase sub- unit I sequences representing 128 centipede species from all five orders of Chilopoda. This sequence dataset was used to estimate genetic diversity for centipede species and compare its distribution with estimates from other arthropod groups. We studied the variation in centipede genetic diversity with species traits and biogeography using a beta regression framework, controlling for the effect of shared evolutionary history within a family.Results: A wide variation in genetic diversity across centipede species (0- 0.1713) falls towards the higher end of values among arthropods. Overall, 27.57% of the variation in mitochondrial COI genetic diversity in centipedes was explained by a combination of predictors related to life history and biogeography. Genetic diversity decreased with body size and latitudinal position of sampled localities, was greater in species showing maternal care and increased with geographic distance among conspecifics.Main Conclusions: Centipedes fall towards the higher end of genetic diversity among arthropods, which may be related to their long evolutionary history and low dispersal ability. In centipedes, the negative association of body size with genetic diversity may be mediated by its influence on local abundance or the influence of ecological strat- egy on long -term population history. Species with maternal care had higher genetic diversity, which goes against expectations and needs further scrutiny. Hemispheric differences in genetic diversity can be due to historic climatic stability and lower sea- sonality in the southern hemisphere. Overall, we find that despite the differences in mean genetic diversity among animals, similar processes related to life-history strat- egy and biogeography are associated with the variation within them.