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| Aguiar,Jonas; Schneider,Horacio; Gomes,Fátima; Carneiro,Jeferson; Santos,Simôni; Rodrigues,Luis R.; Sampaio,Iracilda. |
| The tambaqui, Colossoma macropomum, is the most popular fish species used for aquaculture in Brazil but there is no study comparing genetic variation among native and farmed populations of this species. In the present study, we analyzed DNA sequences of the mitochondrial DNA to evaluate the genetic diversity among two wild populations, a fry-producing breeding stock, and a sample of fish farm stocks, all from the region of Santarém, in the west of the Brazilian state of Pará. Similar levels of genetic diversity were found in all the samples and surprisingly the breeding stock showed expressive representation of the genetic diversity registered on wild populations. These results contrast considerably with those of the previous study of farmed stocks in the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Tambaqui; Mitochondrial DNA; Genetic variability; Aquaculture. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652013000401439 |
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| Gomes,Fátima; Schneider,Horacio; Barros,Claudene; Sampaio,Dioniso; Hashimoto,Diogo; Porto-Foresti,Fábio; Sampaio,Iracilda. |
| Tambaqui (Colossoma macropomum) is the fish species most commonly raised in the Brazilian fish farms. The species is highly adaptable to captive conditions, and is both fast-growing and relatively fecund. In recent years, artificial breeding has produced hybrids with Characiform species, known as "Tambacu" and "Tambatinga". Identifying hybrids is a difficult process, given their morphological similarities with the parent species. This study presents an innovative molecular approach to the identification of hybrids based primarily on Multiplex PCR of a nuclear gene (α-Tropomyosin), which was tested on 93 specimens obtained from fish farms in northern Brazil. The sequencing of a 505-bp fragment of the Control Region (CR) permitted the identification of the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Pisciculture; Multiplex PCR; Mitochondrial DNA; Genetic bottleneck. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652012000200020 |
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