arXiv 1807.030592018-07q-bio.PE

普通Armadillidium vulgare（Isopoda：Oniscidea）的细尺度种群结构分析揭示了强烈的雌性亲物崇拜

Fine-scale population structure analysis in Armadillidium vulgare (Isopoda: Oniscidea) reveals strong female philopatry

Sylvine Durand, Frédéric Grandjean, Isabelle Giraud, Richard Cordaux, Sophie Beltran-Bech, Nicolas Bech

备注：: 23 pages (including 2 figures and one table) and two supplementary files containing 5 pages with 3 tables S1 to S3 and one figure S1, Last two authors have contributed equally to this study
发表信息：: Acta Oecologica, 2019
DOI：: 10.1016/j.actao.2019.103478

摘要：

在过去的几十年里，扩散研究受益于使用分子标记检测不同类别的个人之间的模式，并强调了性别偏见的扩散在几个物种。为了解释这一现象，已经提出了几种假设，暗示交配系统，性内竞争或性别相关的障碍。在这种情况下，我们调查了性别偏见的传播Armadillidium vulgare，一个陆栖等足类动物混杂交配系统。作为有效扩散的代理，我们进行了一个细尺度的调查，男性和女性的空间遗传结构，使用来自5个样点位于彼此70米以内的个人。基于微卫星标记和空间自相关分析，我们的研究结果表明，虽然男性并没有提出一个显着的遗传结构，在这个地理尺度上，女性显着和遗传更相似，当他们被收集在同一个样点。由于A. vulgare，但也因为这个物种是滥交和男性经历了高的性内竞争，我们的研究结果符合最经典的性别偏见的扩散假设的预测。我们认为，扩大扩散的研究，其他等足类动物或甲壳类动物，不同的生态或交配系统，并显示不同程度的父母照顾，可能会揭示性别偏见扩散的演变过程。

英文摘要：

In the last decades, dispersal studies have benefited from the use of molecular markers for detecting patterns differing between categories of individuals and have highlighted sex-biased dispersal in several species. To explain this phenomenon, several hypotheses implying mating systems, intrasexual competition or sex-related handicaps have been proposed. In this context, we investigated sex-biased dispersal in Armadillidium vulgare, a terrestrial isopod with a promiscuous mating system. As a proxy for effective dispersal, we performed a fine-scale investigation of the spatial genetic structure in males and females, using individuals originating from five sampling points located within 70 meters of each other. Based on microsatellite markers and spatial autocorrelation analyses, our results revealed that while males did not present a significant genetic structure at this geographic scale, females were significantly and genetically more similar to each other when they were collected in the same sampling point. As females invest more parental care than males in A. vulgare, but also because this species is promiscuous and males experience a high intrasexual competition, our results meet the predictions of most classical hypotheses for sex-biased dispersal. We suggest that widening dispersal studies to other isopods or crustaceans, differing in their ecology or mating system and displaying varying levels of parental care, might shed light on the processes underlying the evolution of sex-biased dispersal.

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