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Title: Genetic variability of wild and captivity populations of Colossoma macropomum (Cuvier, 1818)
Other Titles: Variabilidade genética de populações selvagens e de cativeiro de Colossoma macropomum (Cuvier, 1818)
Authors: Santos, Carlos Henrique dos Anjos dos
Leitão, Marco Aurélio de Brito
Sousa, Carolina Fernandes Silva de
Santana, Givanildo Ximenes
Nazaré Paula-Silva, Maria de
Val, Vera Maria Fonseca Almeida e
Keywords: Isoenzyme
Agricultural Worker
Colossoma Macropomum
Controlled Study
Fbp 2 Gene
G6pdh 2 Gene
G6pdh 3 Gene
Gene Frequency
Gene Locus
Gene Number
Genetic Distance
Polymorphism, Genetic
Genetic Variability
Pgi 1 Gene
Pgi 2 Gene
Pgm 1 Gene
Genetics, Population
Population Research
Wild Animals
Colossoma Macropomum
Colossoma Marcopomum
Issue Date: 2012
metadata.dc.publisher.journal: Acta Scientiarum - Biological Sciences
metadata.dc.relation.ispartof: Volume 34, Número 2, Pags. 191-197
Abstract: Tambaqui (Colossoma macropomum) is among the most important fish species of the Amazon and one of the most cultivated in Brazil. In the present work we have evaluated the genetic variability of wild and captivity populations of C. macropomum. Enzymatic markers were used to estimate the genetic variability of 41 specimens from a wild group; and 30, 33 and 45 from three captivity groups, which came from Pentecostes (Ceará State), Jaboticabal (São Paulo State) and Itacoatiara (Amazonas State), respectively. Nine isoenzymic systems were used to evaluate the genetic variability of these populations. Using zimogram data we obtained the polymorphism level, allele number, allelic frequency, observed and expected heterozigosity, Wright F statistics (F IS, F ST), genetic distance, level of similarity and group analysis. The isoenzymic data showed that, from the nine systems, six presented polymorphic loci (Fbp-2, G6pdh-2, G6pdh-3, Pgi-1, Pgi-2 and Pgm-1). The populations from Pentecostes and Jaboticabal presented loss of genetic variability and low heterozigosity, compared to the wild population and to the artificial population acquired at Itacoatiara fish farm. Based on these results and on fish farmer information we could consider the population from Itacoatiara as recently derived from a wild population. Concluding, we suggest that the artificial populations of tambaqui, which contain animals originated from this funding population at Pentecostes, should be renewed with the introduction of a new group of individuals with genetic variability equivalent to the wild population.
metadata.dc.identifier.doi: 10.4025/actascibiolsci.v34i2.7149
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