Molecular identification of evolutionary significant units in the Amazon river dolphin Inia sp. (Cetacea: Iniidae)

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dc.creatorBanguera Hinestroza, E
dc.creatorCárdenas, H.
dc.creatorRuíz Garcia, M
dc.creatorMarmontel, M
dc.creatorGaitán Solís, Eliana
dc.creatorVázquez, R.
dc.creatorGarcía Vallejo, F.
dc.date2002-09-01
dc.date2014-10-02T08:32:51Z
dc.date2014-10-02T08:32:51Z
dc.date.accessioned2026-06-27T14:43:53Z
dc.descriptionThe Amazon river dolphin, genus Inia, is endemic to the major river basins of northern South America. No previous studies have focused on the genetic structure of this genus. In this work, 96 DNA samples from specimens of this genus were collected in the Orinoco basin (four rivers), the Putumayo River, a tributary of the Colombian Amazon and the Mamoré, and the Tijamuchí and Ipurupuru rivers in theBolivian Amazon. These samples were used to amplify a fragment of 400 bp of the mitochondrial DNA (mtDNA) control region. In addition, 38 of these samples were also used to sequence 600 bp of the mitochondrial cytochrome b gene. The analysis of the population structure subdivision with an analysis of molecular variance (AMOVA) revealed important aspects about the genetic structure of Inia groups fromthese three geographically separate regions. By comparing the control region DNA and cytochrome b sequences, distinct types of nonshared haplotypes were observed. The net genetic divergence of control region sequences was 6.53% between the Orinoco and Bolivian rivers, 5.32% between the Putumayo and Bolivian rivers, and 2.50% between the Orinoco and Putumayo rivers. For the cytochrome b gene, these values were 2.48%, 2.98%, and 0.06%, respectively. The nucleotide sequences were analyzed phylogenetically using several genetic distance matrices and applying neighbor-joining, maximum likelihood, and maximum parsimony procedures. The results support the proposal to subdivide the Inia genus into at least two evolutionarily significant units: one confined to the Bolivian river basin and the other widely distributed across the Amazon and Orinoco basins.
dc.identifierhttps://hdl.handle.net/10568/43874
dc.identifier.urihttp://hdl.handle.net/123456789/86751
dc.languageen
dc.publisherOxford University Press
dc.rightsOpen Access
dc.sourceBanguera-Hinestroza, E; Cárdenas, H; Ruiz-García, M; Marmontel, M; Gaitán, E; Vázquez, R; García-Vallejo, F. 2002. Molecular Identification of Evolutionarily Significant Units in the Amazon River Dolphin Inia sp. (Cetacea: Iniidae). Journal Heredity. 93 (5): 312-322.
dc.subjectdolphins
dc.subjectamazon river
dc.subjectdna
dc.subjectgenetics
dc.subjectmolecular genetics
dc.subjectgenetic distance
dc.subjectphylogeny
dc.subjectdelfín
dc.subjectrio amazonas
dc.subjectadn
dc.subjectgenética
dc.subjectgenética molecular
dc.subjectdistancia genética
dc.subjectfilogenia
dc.titleMolecular identification of evolutionary significant units in the Amazon river dolphin Inia sp. (Cetacea: Iniidae)
dc.typeJournal Article

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