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首页> 外文期刊>Proceedings of the National Academy of Sciences of the United States of America >Evolution of single and double Wolbachia symbioses during speciation in the Drosophila simulans complex.
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Evolution of single and double Wolbachia symbioses during speciation in the Drosophila simulans complex.

机译：果蝇模拟物复杂的物种形成过程中单个和双重Wolbachia共生的演变。

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摘要

Maternally inherited bacteria of the genus Wolbachia are responsible for the early death of embryos in crosses between uninfected females and infected males in several insect species. This phenomenon, known as cytoplasmic incompatibility, also occurs between strains infected by different symbionts in some species, including Drosophila simulans. Wolbachia was found in two species closely related to D. simulans, Drosophila mauritiana, and Drosophila sechellia, and shown to cause incompatibility in the latter species but not in D. mauritiana. Comparison of bacterial and mtDNA history clarifies the origins of bacterial and incompatibility polymorphisms in D. simulans. Infection in D. mauritiana is probably the result of introgression of an infected D. simulans cytoplasm. Some D. simulans and D. sechellia cytoplasmic lineages harbor two bacteria as a consequence of a double infection which probably occurred in a common ancestor. The descendant symbionts in each species are associated with similar incompatibility relationships, which suggests that little variation of incompatibility types has occurred within maternal lineages beyond that related to the density of symbionts in their hosts.
机译：Wolbachia属的母系遗传细菌是导致几种昆虫物种中未感染的雌性和感染的雄性杂交的胚胎早期死亡的原因。这种现象称为细胞质不相容性，也发生在某些物种（包括拟果蝇）的不同共生菌感染的菌株之间。沃尔巴氏菌存在于与拟D蝇密切相关的两个物种中，即果蝇果蝇（Drosophila mauritiana）和果蝇果蝇（Drosophila sechellia），并显示出与后者不相容，但与毛果蝇不相关。比较细菌和mtDNA的历史，可以清楚地揭示出D. simulans中细菌和不相容多态性的起源。毛里求斯D.感染可能是感染的D. simulans细胞质渗入的结果。由于双重感染的缘故，某些D. simulans和D. sechellia的细胞质谱系可能藏有两种细菌，这可能是同一祖先发生的。每个物种的后代共生体都具有相似的不相容关系，这表明母系谱系中发生的不相容类型几乎没有变化，超出了其宿主共生体的密度。

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