High levels of multiple Wolbachia infection and recombination in the ant Formica exsecta
High levels of multiple Wolbachia infection and recombination in the ant Formica exsecta
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DOI：
10.1093/molbev/msg082
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发表时间：
2003-05-01
影响因子：
10.7
通讯作者：
Keller, L
中科院分区：
文献类型：
--
作者：
Reuter, M;Keller, L
Wolbachia细菌是许多节肢动物物种的细胞内共生体。它们通过宿主种群的传播是通过对其宿主生殖生理的剧烈改变来促进的。在本研究中，我们分析了沃尔巴克氏体菌株和宿主线粒体单倍型之间的关联在瑞士人口的蚂蚁Formica exsecta。在这个物种中，女性的传播是非常有限的，线粒体单倍型之间和亚群内有很大的差异。我们的研究揭示了异常高水平的多重感染，所有蚂蚁都携带四种或五种不同的沃尔巴克氏体菌株。这些菌株中的四种存在于所有分析的蚂蚁中。第五种菌株仅与五种线粒体单倍型中的三种相关。对沃尔巴克氏体基因wsp的分析进一步揭示了意想不到的高重组率，五种沃尔巴克氏体菌株中有三种似乎是通过同源重组产生的。
Wolbachia bacteria are intracellular symbionts of many arthropod species. Their spread through host populations is promoted by drastic alterations imposed on their hosts' reproductive physiology. In the present study, we analyzed the association between Wolbachia strains and host mitochondrial haplotypes in a Swiss population of the ant Formica exsecta. In this species, female dispersal is extremely limited and the mitochondrial haplotypes are strongly differentiated between and within subpopulations. Our study revealed exceptionally high levels of multiple infection, with all ants harboring four or five distinct Wolbachia strains. Four of these strains were present in all ants analyzed. A fifth strain was associated with only three of the five mitochondrial haplotypes. An analysis of the Wolbachia gene wsp further revealed an unexpected high rate of recombination, with three of the five Wolbachia strains appearing to have arisen by homologous recombination.