Analysis by RAPD of the genetic structure of Astyanax altiparanae (Pisces, Characiformes) in reservoirs on the Paranapanema River, Brazil
Genet. mol. biol
;
27(3): 355-362, Sept. 2004. ilus, tab, graf
Artículo
en Inglés
| LILACS
| ID: lil-366180
RESUMO
In this study, the RAPD technique was used to analyze the genetic structure of populations of the fish Astyanax altiparanae (Characidae, Tetragonopterinae) living in the lower, middle and upper Paranapanema River, Brazil. The aim was to assess this structure regarding fish handling and conservation programs. The genetic variability (P) was found to be 42.64 percent, 75 percent and 75 percent in the low, middle and upper reaches, respectively. The dendrogram of genetic similarity, obtained by comparative analysis of the sets of samples from the three sites, showed the formation of three clusters. All of the genetic parameters used indicate that the population in the lower Paranapanema is genetically different from those in the middle and upper sections. The theta P test shows that the low Paranapanema is highly differentiated from the middle (0.2813) and upper (0.2912) Paranapanema, while the differentiation between the last two is moderate (0.0895). The data obtained in the present work suggest that recolonization and conservation studies should not be focused on the species A. altiparanae as such, but on the conservation units, because they are the genetically differentiated populations.
Texto completo:
Disponible
Índice:
LILACS (Américas)
Asunto principal:
Técnica del ADN Polimorfo Amplificado Aleatorio
/
Peces
País/Región como asunto:
America del Sur
/
Brasil
Idioma:
Inglés
Revista:
Genet. mol. biol
Asunto de la revista:
Genética
Año:
2004
Tipo del documento:
Artículo
País de afiliación:
Brasil
Institución/País de afiliación:
Universidade Estadual de Londrina/BR
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