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dc.contributor.authorDoadrio, Ignacio-
dc.contributor.authorAlda, Fernando-
dc.contributor.authorGarcía Garitagoitia, José Luis-
dc.contributor.authorDomínguez-Domínguez, Omar-
dc.contributor.authorPérez-Ponce de León, Gerardo-
dc.identifier.citationBMC Evolutionary Biology 2008, 8:161en_US
dc.descriptionThis Provisional PDF corresponds to the article as it appeared upon acceptance. Fully formatted PDF and full text (HTML) versions will be made available soon. Article URL: http://www.biomedcentral.com/1471-2148/8/161en_US
dc.description.abstract[Background] Tectonic, volcanic and climatic events that produce changes in hydrographic systems are the main causes of diversification and speciation of freshwater fishes. Elucidate the evolutionary history of freshwater fishes permits to infer theories on the biotic and geological evolution of a region, which can further be applied to understand processes of population divergence, speciation and for conservation purposes. The freshwater ecosystems in Central Mexico are characterized by their genesis dynamism, destruction, and compartmentalization induced by intense geologic activity and climatic changes since the early Miocene. The endangered goodeid Zoogoneticus quitzeoensis is widely distributed across Central Mexico, thus making it a good model for phylogeographic analyses in this area.en_US
dc.description.abstract[Results] We addressed the phylogeography, evolutionary history and genetic structure of populations of Z. quitzeoensis through a sequential approach, based on both microsatellite and mitochondrial cytochrome b sequences. Most haplotypes were private to particular locations. All the populations analysed showed a remarkable number of haplotypes. The level of gene diversity within populations was mean Hd = 0.987 (0.714 - 1.00). However, in general the nucleotide diversity was low, pi = 0.0173 (0.0015 - 0.0049). Significant genetic structure was found among populations at the mitochondrial and nuclear level (ST = 0.836 and FST = 0.262, respectively). We distinguished two well-defined mitochondrial lineages that were separated ca. 3.3 million years ago. The time since expansion was ca. 1.5 x 106 years ago for Lineage I and ca. 860,000 years ago for Lineage II. Also, genetic patterns of differentiation, between and within lineages, are described at different historical timescales.en_US
dc.description.abstract[Conclusions] Our mtDNA indicates that the evolution of the different genetic groups is more related to ancient geological and climatic events (Middle Pliocene, ca. 3.3 Mya) than to the current hydrographic configuration of the basins. In general, mitochondrial and nuclear data supported the same relationships between populations, with the exception of some reduced populations in highly polluted basins (Lower Lerma River), where the effects of genetic drift are suggested by the different analyses at the nuclear and mitochondrial level. Further, our findings are of special interest for the conservation of this endangered species.en_US
dc.description.sponsorshipThanks the Consejo Nacional de Ciencia y Tecnología (CONACYT) for providing a scholarship. F.A. benefitted from a grant of the Spanish Ministry of Education and Science. This study was partially funded by the projects CGL2006-12325/BOS, the program PAPIIT-UNAM-IN220605 and IN209608, CONACYT (grant number 47233) to G.P.P.D.L., COECYT Michoacán grant CB07025-8 and by the Chester Zoo UK to O.D.D.en_US
dc.format.extent5345708 bytes-
dc.publisherBioMed Centralen_US
dc.relation.isversionofPublisher’s version-
dc.titleEvolutionary history of the endangered fish Zoogoneticus quitzeoensis (Bean, 1898) (Cyprinodontiformes: Goodeidae) using a sequential approach to phylogeography based on mitochondrial and nuclear DNA dataen_US
dc.description.peerreviewedPeer revieweden_US
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