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Characterization of the complete mitochondrial genome of Amblyomma ovale, comparative analyses and phylogenetic considerations

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Abstract

In this study, we sequenced two complete mitochondrial genomes of Amblyomma ovale, a tick of public health importance. Sequencing two distinct individuals, the resulting mitochondrial genomes were 14,756 and 14,760 bp in length and maintained the same gene order previously reported in Amblyomma. These were combined with RNA-seq derived mitochondrial sequences from three additional species, Amblyomma aureolatum, Amblyomma maculatum, and Amblyomma moreliae, to carry out mitogenome comparative and evolutionary analyses against all previously published tick mitochondrial genomes. We described a derivative genome rearrangement that isolates Ixodes from the remaining Ixodidae and consists of both a reverse translocation as well as an event of Tandem Duplication Random Loss. Genetic distance analyses indicated that cox2, nd1, nd5, and 16S are good candidates for future population studies in A. ovale. The phylogenetic analyses corroborated the utility of complete mitochondrial genomes as phylogenetic markers within the group. This study further supplements the genome information available for Amblyomma and facilitates future evolutionary and population genetic studies within the genus.

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Acknowledgements

We are grateful to Adriana Santodomingo and Andrea Cotes for their collaboration in the collection of the A. ovale (Colombia) specimen, and Makiri Sei and Herman Wirshing for their help in the molecular laboratory. All laboratory work, sequencing, and analyses were conducted in and with the support of the Laboratories of Analytical Biology (LAB) facilities of the National Museum of Natural History.

Funding

JEU was supported by Peter Buck Postdoctoral Fellowship Program from the Smithsonian Institution (2017–2019) and Atracción Talento de la Comunidad de Madrid Fellowship Program (REFF 2019-T2/AMB-13166).

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Contributions

LRC, ELT and SN collected the material; JEU and KRM generated the molecular data; JEU analyzed the data; JEU, SN and LRC wrote the first draft of the manuscript and all authors contributed to writing the final version. All authors read and approved the final manuscript.

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Correspondence to Juan E. Uribe.

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10493_2020_512_MOESM1_ESM.pdf

Electronic supplementary material 1 Supplementary Material. Alternative topology. Phylogenetic relationships of Amblyomma based on mitochondrial protein-coding genes analyzed at the amino-acid level. The tree is a maximum-likelihood phylogram using Ixodes as its root. Numbers at nodes are statistical support values for ML analyses, bootstrap. Asterisks indicate species for which transcriptomes were used. Scale bar = 0.2 substitutions/site. (PDF 58 kb)

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Uribe, J.E., Nava, S., Murphy, K.R. et al. Characterization of the complete mitochondrial genome of Amblyomma ovale, comparative analyses and phylogenetic considerations. Exp Appl Acarol 81, 421–439 (2020). https://doi.org/10.1007/s10493-020-00512-3

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  • DOI: https://doi.org/10.1007/s10493-020-00512-3

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