Prevalence and relationship of endosymbiotic Wolbachia in the butterfly genus Erebia

BMC Ecology and Evolution

Kay Lucek¹  Selim Bouaouina¹  Jurriaan M. de Vos¹  Andrea Grill²  Amanda Jospin³ 

[1] Department of Environmental Sciences - Botany, University of Basel;Institute of Ecology and Evolution, University of Bern;Laboratory of Functional Ecology, Institute of Biology, University of Neuchâtel;

关键词: Lepidoptera;    Wolbachia;    Host shift;    Endosymbiont;    Coevolution;    Glacial refugia;   

DOI  :  10.1186/s12862-021-01822-9

来源: DOAJ

【 摘 要 】

Abstract Background Wolbachia is an endosymbiont common to most invertebrates, which can have significant evolutionary implications for its host species by acting as a barrier to gene flow. Despite the importance of Wolbachia, still little is known about its prevalence and diversification pattern among closely related host species. Wolbachia strains may phylogenetically coevolve with their hosts, unless horizontal host-switches are particularly common. We address  these issues in the genus Erebia, one of the most diverse Palearctic butterfly genera. Results We sequenced the Wolbachia genome from a strain infecting Erebia cassioides and showed that it belongs to the Wolbachia supergroup B, capable of infecting arthropods from different taxonomic orders. The prevalence of Wolbachia across 13 closely related Erebia host species based on extensive population-level genetic data revealed that multiple Wolbachia strains jointly infect all investigated taxa, but with varying prevalence. Finally, the phylogenetic relationships of Wolbachia strains are in some cases significantly associated to that of their hosts, especially among the most closely related Erebia species, demonstrating mixed evidence for phylogenetic coevolution. Conclusions Closely related host species can be infected by closely related Wolbachia strains, evidencing some phylogenetic coevolution, but the actual pattern of infection more often reflects historical or contemporary geographic proximity among host species. Multiple processes, including survival in distinct glacial refugia, recent host shifts in sympatry, and a loss of Wolbachia during postglacial range expansion seem to have jointly shaped the complex interactions between Wolbachia evolution and the diversification of its host among our studied Erebia species.

【 授权许可】

Unknown