Fine-Scale Population Structure but Limited Genetic Differentiation in a Cooperatively Breeding Paper Wasp
Fine-Scale Population Structure but Limited Genetic Differentiation in a Cooperatively Breeding Paper Wasp
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DOI：
10.1093/gbe/evaa070
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发表时间：
2020-05-01
影响因子：
3.3
通讯作者：
Sheehan, Michael J.
中科院分区：
文献类型：
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作者：
Bluher, Sarah E.;Miller, Sara E.;Sheehan, Michael J.
尽管种群结构在合作育种模式的形成中具有长期的重要性，但对昆虫物种合作育种中种群结构的形成过程知之甚少。胡蜂属（Polistes paper wasp），是一种群居性昆虫，具有合作繁殖系统，雌性胡蜂通常在合作协会中筑巢。先前的标记捕获研究Polistes记录极端女性philopatry，虽然遗传研究经常未能检测到强大的人口结构预期的高度philopatric物种。这些发现导致对这些物种的扩散程度和种群结构缺乏共识。本研究在三个尺度上评估了雌性Polistes fuscatus黄蜂的种群结构：在一个单一的网站，整个纽约中部，整个美国东北部。在细胞核和线粒体中观察到空间遗传聚类和距离隔离的模式！基因组在大陆范围内。值得注意的是，人口结构是显而易见的，即使在一个单一的采集地点在精细的空间尺度。然而，P. fuscatus在长距离上的遗传分化水平较低。这些结果表明，棕腹小蜂可能采用多种扩散策略，包括极端的纳塔尔亲蜜以及较长距离的扩散。我们在线粒体中观察到更大的遗传分化！基因比在核基因组中，表明在男性中的扩散距离增加。我们的研究结果支持这一假设，有限的女性传播有助于对人口结构的纸黄蜂。
Relatively little is known about the processes shaping population structure in cooperatively breeding insect species, despite the longhypothesized importance of population structure in shaping patterns of cooperative breeding. Polistes paper wasps are primitively eusocial insects, with a cooperative breeding system in which females often found nests in cooperative associations. Prior markrecapture studies of Polistes have documented extreme female philopatry, although genetic studies frequently fail to detect the strong population structure expected for highly philopatric species. Together these findings have led to lack of consensus on the degree of dispersal and population structure in these species. This study assessed population structure of female Polistes fuscatus wasps at three scales: within a single site, throughout Central New York, and across the Northeastern United States. Patterns of spatial genetic clustering and isolation by distance were observed in nuclear and mitochondria! genomes at the continental scale. Remarkably, population structure was evident even at fine spatial scales within a single collection site. However, P. fuscatus had low levels of genetic differentiation across long distances. These results suggest that P. fuscatus wasps may employ multiple dispersal strategies, including extreme natal philopatry as well as longer-distance dispersal. We observed greater genetic differentiation in mitochondria! genes than in the nuclear genome, indicative of increased dispersal distances in males. Our findings support the hypothesis that limited female dispersal contributes toward population structure in paper wasps.