Widespread Wolbachia infection in an insular radiation of damselflies (Odonata, Coenagrionidae).
Widespread Wolbachia infection in an insular radiation of damselflies (Odonata, Coenagrionidae).
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豆娘（蜻蜓目，Coenagrionidae）岛内辐射中广泛的沃尔巴克氏体感染。
DOI：
10.1038/s41598-019-47954-3
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发表时间：
2019
影响因子：
4.6
通讯作者：
Lorenzo-Carballa MO
中科院分区：
文献类型：
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作者：
Lorenzo-Carballa MO
沃尔巴克氏菌是感染节肢动物的最常见的内共生菌之一。理论预测，像沃尔巴克氏菌这样的共生体将在物种辐射中更加常见，因为宿主转移事件在密切相关的物种之间发生的频率最高。此外，沃尔巴克氏菌的存在本身可能会造成生殖隔离，并促进宿主的物种形成。在这里，我们筛选了属于30种菊蝇属的178个个体，使用多位点序列分型来表征细菌菌株。沃尔巴克氏菌在各病种中的发病率分别为71%和40%，患病率也很高，在所筛查的病种中平均为88%。共鉴定出25株Wolbchiastrains，分属A、B、F超群，部分流行株存在于多个物种中。沃尔巴克氏菌在男性和女性中的出现，以及在两性中发现的相似的全球流行率排除了沃尔巴克氏菌对初级性别比的任何强烈影响，但与细胞质不相容的表型相一致。与大多数地方性岛屿蜻蜓属相比，该属具有更高的物种丰富度，我们讨论了这一组内内共生菌介导的物种形成的可能性。
Wolbachiais one of the most common endosymbionts found infecting arthropods. Theory predicts symbionts likeWolbachiawill be more common in species radiations, as host shift events occur with greatest frequency between closely related species. Further, the presence ofWolbachiaitself may engender reproductive isolation, and promote speciation of their hosts. Here we screened 178 individuals belonging to 30 species of the damselfly generaNesobasisandMelanesobasis— species radiations endemic to the Fiji archipelago in the South Pacific — forWolbachia, using multilocus sequence typing to characterize bacterial strains. Incidence ofWolbachiawas 71% inNesobasisand 40% inMelanesobasis, and prevalence was also high, with an average of 88% in theNesobasisspecies screened. We identified a total of 25Wolbachiastrains, belonging to supergroups A, B and F, with some epidemic strains present in multiple species. The occurrence ofWolbachiain both males and females, and the similar global prevalence found in both sexes rules out any strong effect ofWolbachiaon the primary sex-ratio, but are compatible with the phenotype of cytoplasmic incompatibility.Nesobasishas higher species richness than most endemic island damselfly genera, and we discuss the potential for endosymbiont-mediated speciation within this group.