Mitochondrial DNA sequence variation in Ixodes pacificus (Acari: Ixodidae)

被引：0
作者：
Douglas E Kain
Felix A H Sperling
Howell V Daly
Robert S Lane
机构：
[1] Policy and Management,Department of Environmental Science, Division of Insect Biology
[2] University of California at Berkeley,Department of Biology
[3] Agnes Scott College,Department of Biological Sciences
[4] CW-405 Biological Sciences Bldg.,undefined
[5] University of Alberta,undefined
来源：
Heredity | 1999年 / 83卷
关键词：
gene flow; Ixodidae; Lyme disease; mitochondrial DNA; population structure;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
The western black-legged tick, Ixodes pacificus, is a primary vector of the spirochaete, Borrelia burgdorferi, that causes Lyme disease. We used variation in a 355-bp DNA portion of the mitochondrial cytochrome oxidase III gene to assess the population structure of the tick across its range from British Columbia to southern California and east to Utah. Ixodes pacificus showed considerable haplotype diversity despite low nucleotide diversity. Maximum parsimony and isolation-by-distance analyses revealed little genetic structure except between a geographically isolated Utah locality and all other localities. Loss of mtDNA polymorphism in Utah ticks is consistent with a post-Pleistocene founder event. The pattern of genetic differentiation in the continuous part of the range of Ixodes pacificus reinforces recent recognition of the difficulties involved in using genetic frequency data to infer gene flow and migration.
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页码：378 / 386
页数：8
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