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

[Display omitted] •We used RADseq to provide a high resolution nuclear phylogeny of the Delphininae.•The genus Stenella is least well resolved likely due to admixture among lineages.•Within Tursiops, coastal ecotypes divided early with offshore lineage evolving later.•Cross-lineage gene flow in this...

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Vydáno v:Molecular phylogenetics and evolution Ročník 146; s. 106756
Hlavní autoři: 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., Willson, Maia Sarrouf, Bulushi, Asma, Collins, Tim, Baldwin, Robert, Willson, Andrew, Minton, Gianna, Ponnampalam, Louisa, Hoelzel, A. Rus
Médium: Journal Article
Jazyk:angličtina
Vydáno: United States Elsevier Inc 01.05.2020
Témata:
Animals
Biological Evolution
Cell Nucleus - genetics
Cetacea
Delphininae
Delphinus delphis
demography
dolphins
Dolphins - classification
Dolphins - genetics
Ecosystem
ecotypes
evolutionary radiation
Gene Flow
genome
Genomics
geographical isolation
habitats
monophyly
Phylogeny
Phylogeography
Radseq
Stenella - classification
Stenella coeruleoalba
Stenella frontalis
Stenella longirostris
Tursiops
Tursiops aduncus
Tursiops truncatus
uncertainty
Tursiops
Radseq
Phylogeny
Cetacea
Phylogeography
Delphininae
ISSN:1055-7903, 1095-9513, 1095-9513
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Shrnutí:[Display omitted] •We used RADseq to provide a high resolution nuclear phylogeny of the Delphininae.•The genus Stenella is least well resolved likely due to admixture among lineages.•Within Tursiops, coastal ecotypes divided early with offshore lineage evolving later.•Cross-lineage gene flow in this group has been more extensive than previously thought.•Results improve our understanding of evolutionary processes during rapid radiations. 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.
Bibliografie:ObjectType-Article-1
SourceType-Scholarly Journals-1
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content type line 23
ISSN:1055-7903
1095-9513
1095-9513
DOI:10.1016/j.ympev.2020.106756