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

被引：39

作者：

Kain, DE ^{[1
]}

Sperling, FAH ^{[1
]}

Daly, HV ^{[1
]}

Lane, RS ^{[1
]}

机构：

[1] Univ Calif Berkeley, Div Insect Biol, Dept Environm Sci Policy & Management, Berkeley, CA 94720 USA

来源：

HEREDITY | 1999年 / 83卷 / 4期

关键词：

gene flow; Ixodes pacificus; Ixodidae; Lyme disease; mitochondrial DNA; population structure;

D O I：

10.1038/sj.hdy.6886110

中图分类号：

Q14 [生态学（生物生态学）];

学科分类号：

071012 ; 0713 ;

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.

引用

页码：378 / 386

页数：9

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