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Phylogenomics of the genus Tursiops and closely related Delphininae reveals extensive reticulation among lineages and provides inference about eco-evolutionary drivers

Moura, Andre E.; Shreves, Kypher; Pilot, Małgorzata; Andrews, Kimberly R.; Moore, Daniel M.; Kishida, Takushi; Möller, Luciana; Natoli, Ada; Gaspari, Stefania; McGowen, Michael; Chen, Ing; Gray, Howard; Gore, Mauvis; Culloch, Ross M.; Kiani, Muhammad S.; Sarrouf Willson, Maia; Bulushi, Asma; Collins, Tim; Baldwin, Robert; Willson, Andrew; Minton, Gianna; Ponnampalam, Louisa; Rus Hoelzel, A.

Phylogenomics of the genus Tursiops and closely related Delphininae reveals extensive reticulation among lineages and provides inference about eco-evolutionary drivers Thumbnail


Authors

Andre E. Moura

Kypher Shreves

Małgorzata Pilot

Kimberly R. Andrews

Daniel M. Moore

Takushi Kishida

Luciana Möller

Ada Natoli

Stefania Gaspari

Michael McGowen

Ing Chen

Howard Gray

Mauvis Gore

Ross M. Culloch

Muhammad S. Kiani

Maia Sarrouf Willson

Asma Bulushi

Tim Collins

Robert Baldwin

Andrew Willson

Gianna Minton

Louisa Ponnampalam



Abstract

Phylogeographic inference has provided extensive insight into the relative roles of geographical isolation and ecological processes during evolutionary radiations. However, the importance of cross-lineage admixture in facilitating adaptive radiations is increasingly being recognised, and suggested as a main cause of phylogenetic uncertainty. In this study, we used a double digest RADseq protocol to provide a high resolution (∼ 4 Million bp) nuclear phylogeny of the Delphininae. Phylogenetic resolution of this group has been especially intractable, likely because it has experienced a recent species radiation. We carried out cross-lineage reticulation analyses, and tested for several sources of potential bias in determining phylogenies from genome sampling data. We assessed the divergence time and historical demography of T. truncatus and T. aduncus by sequencing the T. aduncus genome and comparing it with the T. truncatus reference genome. Our results suggest monophyly for the genus Tursiops, with the recently proposed T. australis species falling within the T. aduncus lineage. We also show the presence of extensive cross-lineage gene flow between pelagic and European coastal ecotypes of T. truncatus, as well as in the early stages of diversification between spotted (Stenella frontalis; Stenella attenuata), spinner (Stenella longirostris), striped (Stenella coeruleoalba), common (Delphinus delphis), and Fraser’s (Lagenodelphis hosei) dolphins. Our study suggests that cross-lineage gene flow in this group has been more extensive and complex than previously thought. In the context of biogeography and local habitat dependence, these results improve our understanding of the evolutionary processes determining the history of this lineage.

Citation

Moura, A. E., Shreves, K., Pilot, M., Andrews, K. R., Moore, D. M., Kishida, T., …Rus Hoelzel, A. (2020). Phylogenomics of the genus Tursiops and closely related Delphininae reveals extensive reticulation among lineages and provides inference about eco-evolutionary drivers. Molecular Phylogenetics and Evolution, 146, Article 106756. https://doi.org/10.1016/j.ympev.2020.106756

Journal Article Type Article
Acceptance Date Jan 28, 2020
Online Publication Date Feb 3, 2020
Publication Date May 31, 2020
Deposit Date Feb 4, 2020
Publicly Available Date Feb 28, 2020
Journal Molecular Phylogenetics and Evolution
Print ISSN 1055-7903
Publisher Elsevier
Peer Reviewed Peer Reviewed
Volume 146
Article Number 106756
DOI https://doi.org/10.1016/j.ympev.2020.106756
Public URL https://durham-repository.worktribe.com/output/1277495

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