10.5061/DRYAD.6DR0475T
Amaral, Ana R.
Macquarie University
Jackson, Jennifer A.
British Antarctic Survey
Moller, Luciana M.
Flinders University
Beheregaray, Luciano B.
Flinders University
Manuela Coelho, M.
University of Lisbon
Data from: Species tree of a recent radiation: the subfamily Delphininae
(Cetacea, Mammalia)
Dryad
dataset
2012
Delphinidae
2012-11-05T21:10:44Z
2012-11-05T21:10:44Z
en
https://doi.org/10.1016/j.ympev.2012.04.004
244733 bytes
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CC0 1.0 Universal (CC0 1.0) Public Domain Dedication
Lineages undergoing rapid radiations provide exceptional opportunities for
studying speciation and adaptation, but also represent a challenge for
molecular systematics because retention of ancestral polymorphisms and the
occurrence of hybridization can obscure relationships among lineages.
Dolphins in the subfamily Delphininae are one such case. Non-monophyly,
rapid speciation events, and discordance between morphological and
molecular characters have made the inference of phylogenetic relationships
within this subfamily very difficult. Here we approach this problem by
applying multiple methods intended to estimate species trees using a
multi-gene dataset for the Delphininae (Sousa, Sotalia, Stenella,
Tursiops, Delphinus and Lagenodelphis). Incongruent gene trees obtained
indicate that incomplete lineage sorting and possibly hybridization are
confounding the inference of species history in this group. Nonetheless,
using coalescent-based methods, we have been able to extract an underlying
species-tree signal from divergent histories of independent genes that
supports relationships based on morphology. This is the first time a
molecular study provides support for such relationships. This study
further illustrates how methods of species-tree inference can be very
sensitive both to the characteristics of the dataset and the evolutionary
processes affecting the evolution of the group under study.
Amaraletal-DelphininaeSpeciesTree nexus fileNexus file for the
concatenation of the 13 nuclear loci and 1 mitochondrial gene that were
analyzed in order to estimate a species tree for the subfamily
Delphininae.