10.5061/DRYAD.D6Q87
Garcia-Cisneros, Alex
University of Barcelona
Palacín, Crue
University of Barcelona
Ventura, Carlos Renato R.
Federal University of Rio de Janeiro
Feital, Barbara
Federal University of Rio de Janeiro
Paiva, Paulo C.
Federal University of Rio de Janeiro
Perez Portela, Rocio
Spanish National Research Council
Data from: Intraspecific genetic structure, divergence and high rates of
clonality in an amphi-Atlantic starfish
Dryad
dataset
2017
Coscinasterias tenuispina
clonality
Distribution limits
Marine Barriers
2017-11-20T18:27:43Z
2017-11-20T18:27:43Z
en
https://doi.org/10.1111/mec.14454
66845 bytes
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CC0 1.0 Universal (CC0 1.0) Public Domain Dedication
Intraspecific genetic diversity and divergence have a large influence on
the adaption and evolutionary potential of species. The widely distributed
starfish, Coscinasterias tenuispina, combines sexual reproduction with
asexual reproduction via fission. Here we analyse the phylogeography of
this starfish to reveal historical and contemporary processes driving its
intraspecific genetic divergence. We further consider whether asexual
reproduction is the most important method of propagation throughout the
distribution range of this species. Our study included 326 individuals
from 16 populations, covering most of the species’ distribution range. A
total of 12 nuclear microsatellite loci and sequences of the mitochondrial
cytochrome c oxidase subunit I (COI) gene were analysed. COI and
microsatellites were clustered in two isolated lineages: one found along
the south-western Atlantic and the other along the north-eastern Atlantic
and Mediterranean Sea. This suggests the existence of two different
evolutionary units. Marine barriers along the European coast would be
responsible for population clustering: the Almeria-Oran Front that limits
the entrance of migrants from the Atlantic to the Mediterranean, and the
Siculo Tunisian strait that divides the two Mediterranean basins. The
presence of identical genotypes was detected in all populations, although
two monoclonal populations where found in two sites where annual mean
temperatures and minimum values were the lowest. Our results based on
microsatellite loci showed that intra-population genetic diversity was
significantly affected by clonality whereas it had lower effect for the
global phylogeography of the species, although still some impact on
populations’ genetic divergence could be observed between some
populations.
Genotypes and sequences of sampled individualsMicrosatellite genotypes in
an excel sheet and all sequences obtained in fasta format.Sequences and
genotypes coscinasterias tenuispina.zip
Mediterranean
Atlantic Ocean