Genetic variability of two populations of Pseudoplatystoma reticulatum from the Upper Paraguay River Basin

被引:16
作者
de Abreu, Marcia Matos [1 ]
Garcia Pereira, Luiz Henrique [3 ]
Vila, Vilma Barretto [2 ]
Foresti, Fausto [3 ]
Oliveira, Claudio [3 ]
机构
[1] Univ Estado Mato Grasso, Inst Ciencias Nat & Tecnol, Dept Ciencias Ambientais, BR-78200000 Caceres, MT, Brazil
[2] Univ Estado Mato Grasso, Dept Ciencias Biol, BR-78200000 Caceres, MT, Brazil
[3] Univ Estadual Paulista, Dept Morfol, Inst Biociencias, Botucatu, SP, Brazil
基金
巴西圣保罗研究基金会;
关键词
fish; population genetics; microsatellite; homing; population structure; CORRUSCANS SILURIFORMES; MICROSATELLITE LOCI; NULL ALLELES; FRESH-WATER; PIMELODIDAE; INFERENCE; SOFTWARE; MARINE; DNA; L;
D O I
10.1590/S1415-47572009005000075
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
Catfishes of the genus Pseudoplatystoma are very important species due to both their high commercial value and their ecological role as voracious predators. They undertake lengthy migratory movements during their life-cycle, this including reproductive migration which occurs from October to December in the rainy season. In the present study, seven microsatellite loci were analyzed to access genetic variability in two samples of P. reticulatum from the Upper Paraguay Basin. The loci were highly polymorphic (mean = 7.28). According to all analysis, the two samples of P. reticulatum revealed pronounced genetic differentiation. F-st value was 0.2290, R-st value 0.1067 and AMOVA 22.90% (F-st) and 10.67% (R-st), all being highly significant (p < 0.001). The division of the fishes into two groups was confirmed by microsatellite multi-locus Bayesian assignment testing. The results obtained present evidence of genetic structuring in a P. reticulatum population.
引用
收藏
页码:868 / 873
页数:6
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