Molecular identification and phylogenetic analysis of Siluriformes from the Paraguay River basin, Brazil

AbstractThe objective of this study was to identify, through the DNA barcode, fishable Siluriformes which were collected from the Paraguay River basin in Pantanal. It was analyzed for genetic distancecalculation using the Kimura-two-model parameters and the dendrogramwas builtusing the Neighbour-Joining algorithm. The average genetic distancewithin species, genus and families were 0.2%, 1.6% and 4.2%, respectively. These values were lower than those reported in studies from other continents, probably due to the recent radiation process undergone by Neotropical fish. The dendrogramrevealed two possible cases of hybridization, one individual Pseudoplatystoma corruscans, it was not possible to identify whether it was a natural event or commercial production exhaust and other of Pimeloduscf. argenteus leading to the assumption that the aspects of reproductive isolationcannot be clearly defined. Besides, the populations of the species Hemisorubimplatyrhynchos and e Platydoraarmatulus may be undergoing ...