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dc.contributor.authorPérez-Rodríguez, Rodolfo-
dc.contributor.authorDomínguez-Domínguez, Omar-
dc.contributor.authorPérez-Ponce de León, Gerardo-
dc.contributor.authorDoadrio, Ignacio-
dc.date.accessioned2009-10-02T13:26:50Z-
dc.date.available2009-10-02T13:26:50Z-
dc.date.issued2009-09-07-
dc.identifier.citationBMC Evolutionary Biology 9:223 (2009)en_US
dc.identifier.issn1471-2148-
dc.identifier.urihttp://hdl.handle.net/10261/17412-
dc.description42 pages, 2 additional files, 6 figures, 1 table.en_US
dc.description.abstract[Background] The genus Algansea is one of the most representative freshwater fish groups in central Mexico due to its wide geographic distribution and unusual level of endemicity. Despite the small number of species, this genus has had an unsettled taxonomic history due to high levels of intraspecific morphological variation. Moreover, several phylogenetic hypotheses among congeners have been proposed but have had the following shortcomings: the use of homoplasious morphological characters, the use of character codification and polarisation methods that lacked objectivity, and incomplete taxonomic sampling. In this study, a phylogenetic analysis among species of Algansea is presented. This analysis is based upon two molecular markers, the mitochondrial gene cytochrome b and the first intron of the ribosomal protein S7 gene.en_US
dc.description.abstract[Results] Bayesian analysis based on a combined matrix (cytochrome b and first intron S7) showed that Algansea is a monophyletic group and that Agosia chrysogaster is the sister group. Divergence times dated the origin of the genus around 16.6 MYA, with subsequent cladogenetic events occurring between 6.4 and 2.8 MYA. When mapped onto the molecular phylogenetic hypothesis, the character states of three morphological characters did not support previous hypotheses on the evolution of morphological traits in the genus Algansea, whereas the character states of the remaining six characters partially corroborated those hypotheses.en_US
dc.description.abstract[Conclusions] Monophyly of the genus Algansea was corroborated in this study. Tree topology shows the genus consists of three main lineages: Central-Eastern, Western, and Southern clades. However, the relationships among these clades remained unresolved. Congruence found between the available geological and climatic history and the divergence times made it possible to infer the biogeographical history of Algansea, which suggested that vicariance events were responsible for the evolutionary history of the genus. Interestingly, this pattern was shared with other members of the freshwater fish fauna of central Mexico. In addition, molecular data also show that some morphological traits alleged to represent synapomorphies in previous studies were actually homoplasies. Others traits were corroborated as synapomorphies, particularly in those species of a subgroup corresponding with the Central-Eastern clade within Algansea; this corroboration is interpreted as a result of evolutionary adaptations.en_US
dc.description.sponsorshipThis study was partially funded by grants from CGL2006-12325/BOS, the program PAPIIT-UNAM-IN209608, and CONACYT (grant number 83043) to GPPDL. RPR thank the Consejo Nacional de Ciencia y Tecnología for the scholarship.en_US
dc.format.extent259768 bytes-
dc.format.mimetypeapplication/pdf-
dc.language.isoengen_US
dc.publisherBioMed Centralen_US
dc.relation.isversionofPublisher’s version-
dc.rightsopenAccessen_US
dc.subjectGenus Alganseaen_US
dc.subjectCypriniformesen_US
dc.subjectCyprinidaeen_US
dc.titlePhylogenetic relationships and biogeography of the genus Algansea Girard (Cypriniformes: Cyprinidae) of central Mexico inferred from molecular dataen_US
dc.typeartículoen_US
dc.identifier.doi10.1186/1471-2148-9-223-
dc.description.peerreviewedPeer revieweden_US
dc.relation.publisherversionhttp://dx.doi.org/10.1186/1471-2148-9-223en_US
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