Phylogeographic structure of the fire ant solenopsis invicta in its native South American range: Roles of natural barriers and habitat connectivity

被引:32
作者
Ahrens, ME
Ross, KG
Shoemaker, DD
机构
[1] Univ Wisconsin, Dept Entomol, Russell Labs 643, Madison, WI 53706 USA
[2] Univ Georgia, Dept Entomol, Athens, GA 30602 USA
关键词
fire ant; genetic structure; mitochondrial DNA; nested clade; phylogeography; Solenopsis invicta; Wolbachia;
D O I
10.1111/j.0014-3820.2005.tb01822.x
中图分类号
Q14 [生态学(生物生态学)];
学科分类号
071012 ; 0713 ;
摘要
We generated mitochondrial DNA (mtDNA) sequence data from 402 individuals of the fire ant Solenopsis invicta collected from 11 native populations and analyzed these data using a combination of demographic, phylogenetic, and phylogeographic methods to infer features of the evolutionary history of this species. Prior expectations regarding high levels of genetic structure and isolation by distance among populations were supported by the data, but we also discovered several unanticipated patterns. Our analyses revealed a major genetic break between S. invicta mtDNA haplotypes that coincides with the Mesopotamia wetlands region of South America, resulting in two higher level nested clade groupings. In addition, we identified contrasting patterns of genetic differentiation within these two major groups, which may reflect differences in connectivity of suitable habitat in different parts of the native range of S. invicta. Our study represents the first attempt to understand the phylogeographic history of S. invicta across its native range.
引用
收藏
页码:1733 / 1743
页数:11
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