10.5061/DRYAD.V861K
Harrison, Hugo B.
James Cook University
Berumen, Michael L.
King Abdullah University of Science and Technology
Saenz-Agudelo, Pablo
University Austral de Chile
Salas, Eva
University of California, Santa Cruz
California Academy of Sciences
Williamson, David H.
James Cook University
Jones, Geoffrey P.
James Cook University
Data from: Widespread hybridization and bidirectional introgression in
sympatric species of coral reef fish
Dryad
dataset
2017
Plectropomus leopardus
Natural Selection and Contemporary Evolution
2008-2013
Population ecology
Plectropomus maculatus
2017-08-02T13:56:09Z
2017-08-02T13:56:09Z
en
https://doi.org/10.1111/mec.14279
1725979 bytes
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CC0 1.0 Universal (CC0 1.0) Public Domain Dedication
Coral reefs are highly diverse ecosystems, where numerous closely related
species often coexist. How new species arise and are maintained in these
high geneflow environments have been long-standing conundrums.
Hybridization and patterns of introgression between sympatric species
provide a unique insight into the mechanisms of speciation and the
maintenance of species boundaries. In this study, we investigate the
extent of hybridization between two closely related species of coral reef
fish: the common coral trout (Plectropomus leopardus) and the bar-cheek
coral trout (Plectropomus maculatus). Using a complementary set of 25
microsatellite loci, we distinguish pure genotype classes from first- and
later-generation hybrids, identifying 124 interspecific hybrids from a
collection of 2,991 coral trout sampled in inshore and mid-shelf reefs of
the southern Great Barrier Reef. Hybrids were ubiquitous among reefs,
fertile and spanned multiple generations suggesting both ecological and
evolutionary processes are acting to maintain species barriers. We
elaborate on these finding to investigate the extent of genomic
introgression and admixture from 2,271 SNP loci recovered from a ddRAD
library of pure and hybrid individuals. An analysis of genomic clines on
recovered loci indicates that 261 SNP loci deviate from a model of neutral
introgression, of which 132 indicate a pattern of introgression consistent
with selection favouring both hybrid and parental genotypes. Our findings
indicate genome-wide, bidirectional introgression between two sympatric
species of coral reef fishes and provide further support to a growing body
of evidence for the role of hybridization in the evolution of coral reef
fishes.
Microsat25_2991Plectropomus25 microsatellite loci for 2991 Plectropomus
app collected from the southern Great Barrier Reef,
AustraliaMsat25_2991Plectropomus.txtSNP2271_batch_3_filtered_structure2271
SNP loci from 80 Plectropomus spp. including identified hybrids collected
from the southern Great Barrier Reef, Australia.
Australia
Great Barrier Reef