Affiliation:
1. Universidade Federal de São Carlos, Brazil
2. Universidade Estadual do Oeste do Paraná, Brazil
Abstract
Three populations of the group Hoplias malabaricus from the hydrographic basins of the São Francisco, Araguaia/Tocantins and Xingu Rivers in Brazil were analyzed using classic cytogenetic methods (Giemsa staining, C-banding and Ag-NORs) and molecular methods (fluorescent in situ hybridization with 18S rDNA, 5S rDNA and 5SHindIII satellite DNA probes). The chromosome markers allowed the characterization of these populations as belonging to karyomorph A and the detection of inter-population divergences. These differences likely stem from different evolutionary histories resulting from geographic isolation between populations associated to the dispersive mode of these organisms, reinforcing genetic diversity in the group Hoplias malabaricus.
Subject
Aquatic Science,Animal Science and Zoology,Ecology, Evolution, Behavior and Systematics
Reference46 articles.
1. Contribuição ao estudo da biologia da Traíra Hoplias malabaricus (Bloch, 1794);Azevedo P;Boletim de Indústria Animal,1943
2. The nucleolar organizer regions of Erythrinidae fish: An uncommon situation in the genus Hoplias;Bertollo L. A. C;Cytologia,1996
3. A biodiversity approach in the Neotropical Erythrinidae fish, Hoplias malabaricus: Karyotypic survey, geographic distribution of cytotypes and cytotaxonomic considerations;Bertollo L. A. C;Chromosome Research,2000
4. The X1X2Y sex chromosome system in the fish Hoplias malabaricus: I. G-, C- and chromosome replication banding;Bertollo L. A. C;Chromosome Research,1997
5. Karyotypic diversity and distribution in Hoplias malabaricus (Pisces, Erythrinidae): cytotypes with 2n = 40 chromosomes;Bertollo L. A. C;Brazilian Journal of Genetics,1997