Abstract
The presence of interspecific hybrid surubim (Pseudoplatystoma corruscans × Pseudoplatystoma reticulatum) in natural environments can put at risk the existence of the pure parental lineages. The aim of this study was to characterize the genetic variability of pure Pseudoplatystoma corruscans and Pseudoplatystoma reticulatum individuals from rivers in the Paraná and Paraguay basins in Brazil. Seventy-six pure individuals of P. corruscans and 16 of P. reticulatum were evaluated with six microsatellite loci for both species, along with one species-specific locus each for P. corruscans and P. reticulatum. Loss of heterozygosity was confirmed, and preservation measures for P. corruscans and P. reticulatum are needed in order not to lose further genetic variation. In addition, we confirmed that these markers are useful for the management of pure stocks in natural environments, for fish breeding, and in genetic conservation and improvement programs for these species.
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Acknowledgments
We are grateful to Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) and Fundação de Apoio ao Desenvolvimento do Ensino, Ciência e Tecnologia do Estado de Mato Grosso do Sul (Fundect) for financial support, to Universidade Federal da Grande Dourados (UFGD) for logistic support, to Colônia de Pescadores Artesanais Profissionais “Z-10” of Fátima do Sul/MS, and to Master Vitor Simão Galletti and Professor Doctor Fábio Edir dos Santos Costa from the Universidade Estadual do Mato Grosso do Sul (UEMS) for aid in biological material collection. We also thank Professor Doctor Joelson Gonçalves Pereira and his student Chun Pu Hung from UFGD for their assistance in preparing the map.
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Vaini, J.O., do Amaral Crispim, B., dos Santos Silva, D.B. et al. Genetic variability of pure Pseudoplatystoma corruscans and Pseudoplatystoma reticulatum individuals in the Paraná and Paraguay River basins. Fish Sci 82, 605–611 (2016). https://doi.org/10.1007/s12562-016-0999-3
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DOI: https://doi.org/10.1007/s12562-016-0999-3