Karyotypic diversity between allopatric populations of the group Hoplias malabaricus (Characiformes: Erythrinidae): evolutionary and biogeographic considerations

Neotropical Ichthyology

Vladimir Pavan Margarido¹  Daniel Rodrigues Blanco²  Roberto Laridondo Lui²  Luiz Antonio Carlos Bertollo²  Orlando Moreira Filho² 

[1] Universidade Estadual do Oeste do Paraná;Universidade Federal de São Carlos;

关键词: Cytogenetics;    Trahira;    Karyomorph A;    FISH;    Geographic isolation;   

DOI  :  10.1590/S1679-62252010000200015

来源: DOAJ

【 摘 要 】

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.

【 授权许可】

Unknown