Produção Nacional
Revisado por pares
Loss of genetic variability at the transferrin locus in five hatchery stocks of tambaqui (Colossoma macropomum)
2000; Brazilian Society of Genetics; Volume: 23; Issue: 1 Linguagem: Inglês
10.1590/s1415-47572000000100023
ISSN1678-4685
AutoresDaniela Calcagnotto, Silvio de Almeida Toledo-Filho,
Tópico(s)Fish Ecology and Management Studies
ResumoKnowledge and conservation of the genetic variability in stocks maintained as live gene banks have become a high priority task for Brazilian fish culture. The aim of the present survey was to assess the transferrin allelic diversity of five hatchery stocks of tambaqui (Colossoma macropomum). The tambaqui stock from Pentecoste, the oldest maintained in Brazilian hatchery stations, retained three of the six alleles detected in wild populations of tambaqui from the Amazon River. Other hatchery stocks, directly or indirectly derived from the Pentecoste stock, did not show transferrin allelic variability. Insufficient number of founders and genetic drift due to sampling errors seem to be the main causes leading to loss of genetic diversity in tambaqui hatchery stocks. Appropriate management strategies are required in order to improve the genetic potential of tambaqui stocks in Brazil.
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