Phylogenetic and phylogeographic relationships in Ixodesholocyclus and Ixodescornuatus (Acari: Ixodidae) inferred from COX1 and ITS2 sequences

Simon Song; Renfu Shao; R Atwell; S C Barker; D Vankan

doi:10.1016/j.ijpara.2011.03.008

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Phylogenetic and phylogeographic relationships in Ixodesholocyclus and Ixodescornuatus (Acari: Ixodidae) inferred from COX1 and ITS2 sequences

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Phylogenetic and phylogeographic relationships in Ixodesholocyclus and Ixodescornuatus (Acari: Ixodidae) inferred from COX1 and ITS2 sequences

Simon Song, Renfu Shao, R Atwell, S C Barker and D Vankan

International Journal for Parasitology, Vol.41(8), pp.871-880

2011

DOI: https://doi.org/10.1016/j.ijpara.2011.03.008

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Abstract

tick

Ixodes holocyclus

Ixodes cornuatus

COX1

ITS2

phylogeographic relationship

sympatry

We inferred the phylogenetic and phylogeographic relationships in ticks, which were identified morphologically as Ixodes holocyclus and Ixodes cornuatus, from mitochondrial cytochrome oxidase subunit 1 (COX1) and nuclear internal transcribed spacer 2 (ITS2) sequences. We obtained COX1 (640 bp) and ITS2 (527-568 bp) sequences from 429 ticks from 49 localities in Tasmania, Victoria, New South Wales and Queensland, Australia. Our analyses show that there are two species of Ixodes in eastern Australia that cause paralysis in dogs and other mammals: I. holocyclus and I. cornuatus. Further, we conclude that the morphological criteria used to differentiate female I. holocyclus and I. cornuatus are equivocal but I. holocyclus can be distinguished from I. cornuatus using COX1 and/or ITS2 sequences. Intraspecific genetic variation in I. holocyclus and I. cornuatus was less than 0.86% and 0.19% for COX1 and ITS2, respectively. Ixodes holocyclus could be genetically distinguished between different geographic ranges. There were no significant genetic differences between I.cornuatus from Tasmania and mainland Australia, but there are some COX1 haplotypes of I. cornuatus from the mainland that were not detected in Tasmanian and vice versa.

Details

Title: Phylogenetic and phylogeographic relationships in Ixodesholocyclus and Ixodescornuatus (Acari: Ixodidae) inferred from COX1 and ITS2 sequences
Authors: Simon Song (Author) - University of Queensland
Renfu Shao (Author) - University of Queensland
R Atwell (Author) - University of Queensland
S C Barker (Author) - University of Queensland
D Vankan (Author) - University of Queensland
Publication details: International Journal for Parasitology, Vol.41(8), pp.871-880
Publisher: Elsevier Ltd.
Date published: 2011
DOI: 10.1016/j.ijpara.2011.03.008
ISSN: 0020-7519
Organisation Unit: School of Science and Engineering - Legacy; University of the Sunshine Coast, Queensland; School of Science, Technology and Engineering; Centre for Bioinnovation
Language: English
Record Identifier: 99449774902621
Output Type: Journal article

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