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Int. J. Mol. Sci. 2009, 10(12), 5455-5470; doi:10.3390/ijms10125455
Article

Sharp Phylogeographic Breaks and Patterns of Genealogical Concordance in the Brine Shrimp Artemia franciscana

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Received: 1 December 2009 / Revised: 16 December 2009 / Accepted: 17 December 2009 / Published: 18 December 2009
(This article belongs to the Special Issue Cladistic Analysis and Molecular Evolution)
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Abstract

Genealogical concordance is a critical overlay of all phylogenetic analyses, irrespective of taxonomic level. To assess such patterns of congruence we have compiled and derived sequence data for two mitochondrial (16S rRNA, COI) and two nuclear (ITS1, p26) markers in 14 American populations of the hypersaline branchiopod Artemia franciscana. Cladistic analysis revealed three reciprocally monophyletic mitochondrial clades. For nuclear DNA, incomplete lineage sorting was evident presumably as a result of slower coalescence or male-mediated dispersal. Our findings capture the genealogical interval between gene splitting and population divergence. In this sense, strong indications are provided in favour of a superspecies status and ongoing speciation in A. franciscana.
Keywords: mitochondrial DNA; zooplankton; endemism; dispersal; superspecies; coalescence; Andes; incipient speciation mitochondrial DNA; zooplankton; endemism; dispersal; superspecies; coalescence; Andes; incipient speciation
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Maniatsi, S.; Kappas, I.; Baxevanis, A.D.; Farmaki, T.; Abatzopoulos, T.J. Sharp Phylogeographic Breaks and Patterns of Genealogical Concordance in the Brine Shrimp Artemia franciscana. Int. J. Mol. Sci. 2009, 10, 5455-5470.

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