Recombination confounds interpretations of Wolbachia evolution

被引:84
作者
Jiggins, FM
von der Schulenburg, JHG
Hurst, GDD
Majerus, MEN
机构
[1] Univ Cambridge, Dept Genet, Cambridge CB2 3EH, England
[2] Univ Munster, Inst Spezielle Zool, Abt Evolut Biol, D-48149 Munster, Germany
[3] UCL, Galton Lab, Dept Biol, London NW1 2HE, England
关键词
Wolbachia; recombination; phylogeny; wsp; ftsZ; cytoplasmic incompatibility;
D O I
10.1098/rspb.2001.1656
中图分类号
Q [生物科学];
学科分类号
07 ; 0710 ; 09 ;
摘要
Wolbachia are vertically transmitted bacteria known from arthropods and nematode worms, which are maintained in host populations because they either physiologically benefit infected individuals or parasitically manipulate their reproduction. The different manipulation phenotypes are scattered across the Wolbachia phylogeny, suggesting that there have been multiple evolutions of similar phenotypes. This conclusion relies on the assumption of an absence of recombination between bacterial strains, so that the gene used to reconstruct the phylogeny reflects the evolutionary history of the genes involved in the trait. We tested for recombination by reconstructing the phylogeny of two Wolbachia genes from seven B-subdivision strains. The two genes produced mutually incompatible topologies, indicating that these lineages are subject to genetic recombination. This means that many evolutionary patterns inferred from Wolbachia phylogenies must be re-evaluated. Furthermore, recombination may be an important feature both in the evolution of the manipulation phenotypes and avoidance of Mullers' ratchet. Finally, we discuss the implications of recombinations for attempts to genetically engineer Wolbachia for use in the control of crop pests and human pathogens.
引用
收藏
页码:1423 / 1427
页数:5
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