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dc.contributor.authorSotelo, Gracielaes_ES
dc.contributor.authorDuvetorp, Mårtenes_ES
dc.contributor.authorCosta, Dianaes_ES
dc.contributor.authorPanova, Marinaes_ES
dc.contributor.authorJohannesson, Kerstines_ES
dc.contributor.authorFaria, Ruies_ES
dc.identifier.citationBMC Evolutionary Biology 20: 23 (2020)es_ES
dc.description.abstract[Background] The flat periwinkles, Littorina fabalis and L. obtusata, are two sister species widely distributed throughout the Northern Atlantic shores with high potential to inform us about the process of ecological speciation in the intertidal. However, whether gene flow has occurred during their divergence is still a matter of debate. A comprehensive assessment of the genetic diversity of these species is also lacking and their main glacial refugia and dispersal barriers remain largely unknown. In order to fill these gaps, we sequenced two mitochondrial genes and two nuclear fragments to perform a phylogeographic analysis of flat periwinkles across their distribution range.es_ES
dc.description.abstract[Results] We identified two main clades largely composed by species-specific haplotypes corresponding to L. obtusata and L. fabalis, with moderate to strong support, respectively. Importantly, a model of divergence with gene flow between the two species (from L. obtusata to L. fabalis) was better supported, both in Iberia and in northern-central Europe. Three mitochondrial clades were detected within L. fabalis and two within L. obtusata, with strong divergence between Iberia and the remaining populations. The largest component of the genetic variance within each species was explained by differences between geographic regions associated with these clades. Our data suggests that overall intraspecific genetic diversity is similar between the two flat periwinkle species and that populations from Iberia tend to be less diverse than populations from northern-central Europe.es_ES
dc.description.abstract[Conclusions] The phylogeographic analysis of this sister-species pair supports divergence with gene flow. This system thus provides us with the opportunity to study the contribution of gene flow and natural selection during diversification. The distribution of the different clades suggests the existence of glacial refugia in Iberia and northern-central Europe for both species, with a main phylogeographic break between these regions. Although the genetic diversity results are not fully conclusive, the lower diversity observed in Iberia could reflect marginal conditions at the southern limit of their distribution range during the current interglacial period.es_ES
dc.description.sponsorshipThis study was supported by: European Regional Development Fund (FCOMP-01-0124-FEDER-014272), FCT – Foundation for Science an d Technology (PTDC/BIA-EVF/113805/2009), ASSEMBLE (grant number 227799), the Centre of Marine Evolutionary Biology and a Linnaeus grant from Swedish Research Councils VR and Formas. RF was financed by FCT (SFRH/BPD/89313/2012) and is currently funded by the European Union’s Horizon 2020 research and innovation programme, under the Marie Sklodowska-Curie grant agreement number 706376. GS was financed by Volkswagen Stiftung (50500776).es_ES
dc.publisherBioMed Centrales_ES
dc.relation.isversionofPublisher's versiones_ES
dc.subjectGenetic diversityes_ES
dc.subjectMarine gastropodses_ES
dc.subjectMitochondrial DNAes_ES
dc.subjectThioredoxin peroxidase 2es_ES
dc.titlePhylogeographic history of flat periwinkles, Littorina fabalis and L. obtusataes_ES
dc.description.peerreviewedPeer reviewedes_ES
dc.contributor.funderEuropean Commissiones_ES
dc.contributor.funderFoundation for Science and Technologyes_ES
dc.contributor.funderLinnaeus Centre for Marine Evolutionary Biology (Sweden)es_ES
dc.contributor.funderSwedish Research Counciles_ES
dc.contributor.funderFundação para a Ciência e a Tecnologia (Portugal)es_ES
dc.contributor.funderVolkswagen Foundationes_ES
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