Flexible social organization and high incidence of drifting in the sweat bee, Halictus scabiosae-猫眼课题宝

汗蜂Halictus scabiosae社会组织灵活，漂流发生率高

DOI：

10.1111/j.1365-294x.2009.04154.x

发表时间：

2009

期刊：

Molecular Ecology

影响因子：

4.9

通讯作者：

中科院分区：

生物学1区

文献类型：

作者：

Y. Ulrich;N. Perrin;M. Chapuisat

汗蜂非常多样化的社会系统使它们成为研究社会进化的有趣模型。在这里，我们专注于分散行为和社会组织的Halictus scabiosae，一个共同的，但鲜为人知的欧洲物种。通过结合野外观察和遗传数据，我们发现，女性有多种生殖策略，这产生了很大的多样性，在社会结构的巢。对60个巢的详细微卫星分析显示，55%的巢包含单个雌性的后代，而其余的巢具有更复杂的社会结构，其中三个明确的案例是多个雌性在同一个巢中繁殖，并且经常出现不相关的个体。在巢之间漂移是令人惊讶的常见现象，因为在整个样本中的122个巢中有16%和具有复杂社会结构的巢中有44%包含的雌性具有与在种群的其他巢中采样的雌性的全姐妹篇一致的基因型。漂流者来自生产力高于平均水平的巢，与巢友无关，这表明漂流可能是一种避免相关雌性之间竞争的策略。遗传分化的性别特异性比较表明，扩散是男性偏向，这将加强当地的资源竞争的女性。种群间遗传分化的模式是一致的补丁殖民化和灭绝的动态过程中，预期从不稳定的，人为的栖息地，这个物种。总的来说，我们的数据表明，H。scabiosae在扩散行为和社会组织方面差异很大。令人惊讶的高频率的漂流者呼应了最近在黄蜂和蜜蜂中的发现，呼吁进一步研究社会昆虫中漂流的适应基础。

The very diverse social systems of sweat bees make them interesting models to study social evolution. Here we focus on the dispersal behaviour and social organization of Halictus scabiosae, a common yet poorly known species of Europe. By combining field observations and genetic data, we show that females have multiple reproductive strategies, which generates a large diversity in the social structure of nests. A detailed microsatellite analysis of 60 nests revealed that 55% of the nests contained the offspring of a single female, whereas the rest had more complex social structures, with three clear cases of multiple females reproducing in the same nest and frequent occurrence of unrelated individuals. Drifting among nests was surprisingly common, as 16% of the 122 nests in the overall sample and 44% of the nests with complex social structure contained females that had genotypes consistent with being full‐sisters of females sampled in other nests of the population. Drifters originated from nests with an above‐average productivity and were unrelated to their nestmates, suggesting that drifting might be a strategy to avoid competition among related females. The sex‐specific comparison of genetic differentiation indicated that dispersal was male‐biased, which would reinforce local resource competition among females. The pattern of genetic differentiation among populations was consistent with a dynamic process of patch colonization and extinction, as expected from the unstable, anthropogenic habitat of this species. Overall, our data show that H. scabiosae varies greatly in dispersal behaviour and social organization. The surprisingly high frequency of drifters echoes recent findings in wasps and bees, calling for further investigation of the adaptive basis of drifting in the social insects.

DNA fingerprinting analysis of parent-offspring conflict in a bee.