Fine-scale genetic structure reflects sex-specific dispersal strategies in a population of sociable weavers (Philetairus socius).
Fine-scale genetic structure reflects sex-specific dispersal strategies in a population of sociable weavers (Philetairus socius).
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精细的遗传结构反映了社交织工（Philetairus socius）群体中性别特异性的传播策略。
DOI：
10.1111/mec.13308
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发表时间：
2015
影响因子：
4.9
通讯作者：
Van Dijk RE
中科院分区：
文献类型：
--
作者：
Van Dijk RE
扩散是基因流动的关键驱动力，对种群遗传结构、社会相互作用和其他生物过程产生重要影响。有限的扩散可能会导致亲缘结构的种群，其中亲缘选择可能会起作用，但它也可能增加亲缘竞争和近亲繁殖的风险。在这里，我们使用长期的实地数据和分子遗传学的组合来研究传播模式及其对高度社会化的鸟类群体遗传学的影响，社会性的织布鸟（Philetairus socius），它表现出从核心家庭群体到其独特的公共巢穴的各种社会性水平的合作。使用20年的数据，涉及捕获6508只鸟和3151夺回48个殖民地，我们发现，两性表现出philopatry和任何分散发生在相对较短的距离。扩散是女性偏见，与女性分散更早，更远，和不太密切相关的目的地殖民地比男性。来自30个菌落的基因分型数据表明，这种分散模式反映在两性的精细遗传结构上，通过遗传相关性和菌落间显著遗传变异方面的距离隔离来揭示。这两种关系在男性中比女性更强。重要的是，显著的相关性超出了殖民地的水平。这种精细的群体遗传结构可能在该物种合作行为的进化中发挥了重要作用，但它也可能导致显着的近亲繁殖风险，单独的雌性偏向扩散不太可能是一种有效的策略。
Dispersal is a critical driver of gene flow, with important consequences for population genetic structure, social interactions and other biological processes. Limited dispersal may result in kin‐structured populations in which kin selection may operate, but it may also increase the risk of kin competition and inbreeding. Here, we use a combination of long‐term field data and molecular genetics to examine dispersal patterns and their consequences for the population genetics of a highly social bird, the sociable weaver (Philetairus socius), which exhibits cooperation at various levels of sociality from nuclear family groups to its unique communal nests. Using 20 years of data, involving capture of 6508 birds and 3151 recaptures at 48 colonies, we found that both sexes exhibit philopatry and that any dispersal occurs over relatively short distances. Dispersal is female‐biased, with females dispersing earlier, further, and to less closely related destination colonies than males. Genotyping data from 30 colonies showed that this pattern of dispersal is reflected by fine‐scale genetic structure for both sexes, revealed by isolation by distance in terms of genetic relatedness and significant genetic variance among colonies. Both relationships were stronger among males than females. Crucially, significant relatedness extended beyond the level of the colony for both sexes. Such fine‐scale population genetic structure may have played an important role in the evolution of cooperative behaviour in this species, but it may also result in a significant inbreeding risk, against which female‐biased dispersal alone is unlikely to be an effective strategy.