2024-03-29T00:58:07Zhttp://digital.csic.es/dspace-oai/requestoai:digital.csic.es:10261/1462582021-12-28T16:43:38Zcom_10261_88com_10261_8col_10261_341
Population genomics of an endemic Mediterranean fish: differentiation by fine scale dispersal and adaptation
Carreras, Carlos
Ordóñez, Víctor
Zane, Lorenzo
Kruschel, Claudia
Nastro, Ina
Macpherson, Enrique
Pascual, Marta
Este artículo contiene 12 páginas, 5 figuras, 2 tablas.
The assessment of the genetic structuring of biodiversity is crucial for management and conservation.
For species with large effective population sizes a low number of markers may fail to identify population
structure. A solution of this shortcoming can be high-throughput sequencing that allows genotyping
thousands of markers on a genome-wide approach while facilitating the detection of genetic structuring
shaped by selection. We used Genotyping-by-Sequencing (GBS) on 176 individuals of the endemic
East Atlantic peacock wrasse (Symphodus tinca), from 6 locations in the Adriatic and Ionian seas. We
obtained a total of 4,155 polymorphic SNPs and we observed two strong barriers to gene flow. The first
one differentiated Tremiti Islands, in the northwest, from all the other locations while the second one
separated east and south-west localities. Outlier SNPs potentially under positive selection and neutral
SNPs both showed similar patterns of structuring, although finer scale differentiation was unveiled with
outlier loci. Our results reflect the complexity of population genetic structure and demonstrate that
both habitat fragmentation and positive selection are on play. This complexity should be considered in
biodiversity assessments of different taxa, including non-model yet ecologically relevant organisms.
2017-03-07T08:07:29Z
2017-03-07T08:07:29Z
2017-03-06
artículo
Scientific Reports 7 : 43417 (2017)
2045-2322
http://hdl.handle.net/10261/146258
10.1038/srep43417
2045-2322
28262802
eng
Publisher's version
http://dx.doi.org/10.1038/srep43417
Sí
openAccess
Nature Publishing Group