Population genetic structure of Ixodes pacificus (Acari: Ixodidae) using allozymes

被引:20
|
作者
Kain, DE
Sperling, FAH
Lane, RS
机构
[1] Dept. Environ. Sci., Plcy. and Mgmt., University of California at Berkeley, Berkeley
关键词
Ixodes pacificus; allozymes; population genetics; gene flow;
D O I
10.1093/jmedent/34.4.441
中图分类号
Q96 [昆虫学];
学科分类号
摘要
Genetic analysis of the population structure of the western blacklegged tick, Ixodes pacificus Cooley & Kohls, was conducted using allozymes. This vector tick transmits the Lyme disease spirochete, Borrelia burgdorferi Johnson, Schmid, Hyde, Steigerwalt & Brenner, in the far-western United States. It ranges from British Columbia to Baja California and disjunct populations are present in Oregon, Nevada, Utah, and Arizona. Host-seeking adult ticks were collected from vegetation across the range of the species and were partially fed on rabbits prior to analysis. Twelve putative loci were resolved using starch gel electrophoresis. One locus, glucose-6-phosphate isomerase, formed an apparent north/south latitudinal dine and showed significant geographic structure. None of the remaining loci exhibited much genetic differentiation. Estimates of gene flow were high relative to other arthropods. Isolation-by-distance analysis suggests a recent and rapid range expansion. We conclude that the overall lack of differentiation is due high rates of gene flow.
引用
收藏
页码:441 / 450
页数:10
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