Produção Nacional
Caracterização genética de estoques de curimba ("Prochilodus lineatus") utilizados em programas de repovoamento
2008; UNIVERSIDADE FEDERAL DA BAHIA; Volume: 9; Issue: 4 Linguagem: Inglês
ISSN
1519-9940
AutoresTaís da Silva Lopes, Ricardo Pereira Ribeiro, Nelson Maurício Lopera Barrero, Rodolfo Nardez Sirol, Jayme Aparecido Povh, Patrícia Cristina Gomes, Lauro Vargas,
Tópico(s)Animal Genetics and Reproduction
ResumoThe aim with this study was to determine the genetic diversity of P. lineatus stocks, destined to stocking programs, with the RAPD molecular marker (Random Amplified Polymorphic DNA). Fifty two broodstocks of two fish farmings located at Salto Grande - SP (A) and Palotina - PR (B) counties and 32 juvenile progenies of Palotina stock (C) were analyzed. The six primers produced 63 fragments (96.83% polymorphism). The genetic variability values determined by the polymorphic fragments percentage (A: 80.95%; B: 85.71% and C: 79.37%) showed decreasing genetic variability in C possibly due to the inadequate reproductive management. The genetic variability between A and B stocks showed moderate genetic differentiation among them, mainly due to the founder effect. This result was confirmed by the values of Gst (0.084), gene flow Nm (5.48), genetic identity (0.926) and distance (0.077) and genetic similarity (A: 0.603 and B: 0.658), that provided important informations for a safe ichthyofauna and ecosystem conservation.
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