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Genetica

, 139:1009 | Cite as

Multi-locus species tree of the chub genus Squalius (Leuciscinae: Cyprinidae) from western Iberia: new insights into its evolutionary history

  • Silke Waap
  • Ana R. Amaral
  • Bruno Gomes
  • M. Manuela Coelho
Article

Abstract

The phylogenetic relationships of the genus Squalius are believed to be well established based on the mitochondrial cytochrome b gene. Here, we inferred the phylogenetic relationships of all species inhabiting most of the western Iberia river systems using a nuclear multi-locus approach and different species tree methods: concatenation and coalescent-based methods (BEST and minimize-deep-coalescence). The dataset comprised sequences of seven coding and three non-coding regions belonging to seven nuclear genes, which were chosen to cover multiple biological functions: amh, bmp4, ef1a, egr2, irbp, rh and rpl8. We provide evidence for a conflicting topology between the nuDNA species tree and the widely reported mtDNA gene tree. S. pyrenaicus is rendered paraphyletic in all nuDNA species trees, with populations of the Tagus/Colares clustering with S. carolitertii, while populations from the Guadiana, Sado and Almargem form a separate clade. Although a larger sampling size encompassing the full spectrum of Squalius populations in western Iberia is still needed to fully elucidate the phylogeography and species delimitation of this genus, our results suggest that the two S. pyrenaicus clades may represent different species.

Keywords

Nuclear genes BEST Minimize-deep-coalescence Species tree Squalius Western Iberia 

Notes

Acknowledgments

The authors would like to thank André Gille for providing us the tissue samples used as an outgroup, the Museu Nacional de História Natural—Universidade Lisboa for the tissue samples of S. aradensis and Maria Ana Aboim, Isa Matos and Miguel Machado for help in the field work. Funding was supported by the FCT Project PTDC/BIA-BDE/69769/2006. Part of this work was carried out using the resources of the Computational Biology Service Unit from Cornell University, which is partially funded by Microsoft Corporation.

Supplementary material

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Supplementary material 1 (PDF 2412 kb)
10709_2011_9602_MOESM2_ESM.pdf (108 kb)
Supplementary material 2 (PDF 107 kb)

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Copyright information

© Springer Science+Business Media B.V. 2011

Authors and Affiliations

  • Silke Waap
    • 1
  • Ana R. Amaral
    • 1
    • 2
  • Bruno Gomes
    • 1
  • M. Manuela Coelho
    • 1
  1. 1.Centro de Biologia Ambiental, Faculdade de CiênciasUniversidade de LisboaLisbonPortugal
  2. 2.Department of Biological SciencesMacquarie UniversitySydneyAustralia

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