Hybridization in natural sympatric populations of Dermacentor ticks in northwestern North America

A. Araya-Anchetta, G. A. Scoles, J. Giles, J. D. Busch, David M Wagner

Research output: Contribution to journalArticle

17 Citations (Scopus)

Abstract

Hybridization in ticks has been described in a handful of species and mostly as a result of laboratory experiments. We used 148 AFLP loci to describe putative hybridization events between D. andersoni and D. variabilis in sympatric populations from northwestern North America. Recently, D. variabilis has expanded its range westward into the natural range of D. andersoni. Using a sample of 235 D. andersoni and 62 D. variabilis, we identified 31 individuals as putative hybrids: four F2 individuals and 27 backcrosses to D. andersoni (as defined by NewHybrids). We found no evidence of hybrids backcrossing into D. variabilis. Furthermore, all hybrids presented 16S mtDNA signatures characteristic of D. andersoni, which indicates the directionality of the hybrid crosses: female D. andersoni × male D. variabilis. We also discovered 13 species-specific AFLP fragments for D. andersoni. These loci were found to have a decreased occurrence in the putative hybrids and were absent altogether in D. variabilis samples. AFLP profiles were also used to determine the levels of genetic population structure and gene flow among nine populations of D. andersoni and three of D. variabilis. Genetic structure exists in both species (D. andersoni, ΦST = 0.110; D. variabilis, ΦST = 0.304) as well as significant estimates of isolation by distance (D. andersoni, ρ = 0.066, P = 0.001; D. variabilis, ρ = 0.729, P = 0.001).

Original languageEnglish (US)
Pages (from-to)714-724
Number of pages11
JournalEcology and Evolution
Volume3
Issue number3
DOIs
StatePublished - Mar 2013

Fingerprint

Dermacentor
tick
sympatry
ticks
hybridization
amplified fragment length polymorphism
loci
backcrossing
genetic structure
gene flow
population structure
mitochondrial DNA
North America
sampling

Keywords

  • D. variabilis
  • Dermacentor andersoni
  • Hybridization
  • Population structure
  • Ticks

ASJC Scopus subject areas

  • Ecology, Evolution, Behavior and Systematics
  • Ecology
  • Nature and Landscape Conservation

Cite this

Hybridization in natural sympatric populations of Dermacentor ticks in northwestern North America. / Araya-Anchetta, A.; Scoles, G. A.; Giles, J.; Busch, J. D.; Wagner, David M.

In: Ecology and Evolution, Vol. 3, No. 3, 03.2013, p. 714-724.

Research output: Contribution to journalArticle

Araya-Anchetta, A. ; Scoles, G. A. ; Giles, J. ; Busch, J. D. ; Wagner, David M. / Hybridization in natural sympatric populations of Dermacentor ticks in northwestern North America. In: Ecology and Evolution. 2013 ; Vol. 3, No. 3. pp. 714-724.
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