RAPD markers indicate the occurrence of structured populations in a migratory freshwater fish species
Genet. mol. biol
;
26(1): 19-25, Mar. 2003. ilus, tab
Article
Dans Anglais
| LILACS
| ID: lil-336054
ABSTRACT
Many factors have contributed to the destruction of fishhabitats. Hydroelectric dams, water pollution and otherenvironmental changes have resulted in the eradication ofnatural stocks. The aim of this study was to detect the genetic variation in Prochilodus marggravii from three collection sites in the area of influence of the Tres Marias dam (MG) on the Sao Francisco river (Brazil), using the RAPD technique. The results obtained revealed that the fish in the downstream region nearest the dam have a higher similarity coefficient than those from the other sampling sites that may be related to differences in environmental characteristics in these regions.Additionaly, significant differences in the band frequencies were observed from one collection site to another. These both findings suggest the occurrence of a structured population and have important implications for the conservation of the genetic variability of distinct natural P. marggravii stocks
Texte intégral:
Disponible
Indice:
LILAS (Amériques)
Sujet Principal:
Variation génétique
/
Technique RAPD
/
Poissons
Limites du sujet:
Animaux
langue:
Anglais
Texte intégral:
Genet. mol. biol
Thème du journal:
Génétique
Année:
2003
Type:
Article
Pays d'affiliation:
Brésil
Institution/Pays d'affiliation:
UFSCAR/BR
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