Characterizing Mitochondrial Capture in an Iberian Shrew

Henry D. Kunerth; Joaquim T. Tapisso; Raul Valente; Maria da Luz Mathias; Paulo C. Alves; Jeremy B. Searle; Rodrigo Vega; Joana Paupério

doi:10.20944/preprints202210.0187.v1

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preprints.org > biology and life sciences > animal science, veterinary science and zoology > doi: 10.20944/preprints202210.0187.v1

Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Characterizing Mitochondrial Capture in an Iberian Shrew

^* ,

Version 1 : Received: 9 October 2022 / Approved: 13 October 2022 / Online: 13 October 2022 (07:10:47 CEST)

A peer-reviewed article of this Preprint also exists.

Kunerth, H.D.; Tapisso, J.T.; Valente, R.; Mathias, M.L.; Alves, P.C.; Searle, J.B.; Vega, R.; Paupério, J. Characterising Mitochondrial Capture in an Iberian Shrew. Genes 2022, 13, 2228. Kunerth, H.D.; Tapisso, J.T.; Valente, R.; Mathias, M.L.; Alves, P.C.; Searle, J.B.; Vega, R.; Paupério, J. Characterising Mitochondrial Capture in an Iberian Shrew. Genes 2022, 13, 2228.

Abstract

Mitochondrial introgression raises questions of biogeography, and extent of reproductive isolation and natural selection. Previous phylogenetic work on the Sorex araneus complex revealed apparent mitonuclear discordance in Iberian shrews indicating past hybridization of S. granarius and the Carlit chromosomal race of S. araneus, enabling introgression of the S. araneus mitochondrial genome into S. granarius. To further study this, we genetically typed 61 S. araneus/coronatus/granarius from localities in Portugal, Spain, France and Andorra at mitochondrial, autosomal and sex-linked loci, and combined our data with the previously published sequences. Our data are consistent with the earlier data that S. coronatus and S. granarius are the most closely related of the three species and confirm that S. granarius from the Central System mountain range in Spain captured the mitochondrial genome from a population of S. araneus. The mitochondrial capture event can be explained by invoking a biogeographical scenario whereby S. araneus was in contact with S. granarius during the Younger Dryas in central Iberia despite the two species currently having disjunct distributions. We discuss whether selection favoured S. granarius with an introgressed mitochondrial genome. Our data also suggest recent hybridization and introgression between S. coronatus and S. granarius and between S. araneus and S. coronatus.

Keywords

Sorex araneus complex; karyotype; introgression; phylogenetics; hybridization; Iberia

Subject

Biology and Life Sciences, Animal Science, Veterinary Science and Zoology

Copyright: This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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