Analyses of Nucleolus Organizer Regions and Heterochromatin of Pimelodus Maculatus (Pisces, Pimelodidae) |
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Authors: | Ana Claudia Swarça Lucia Giuliano-Caetano Ana Lúcia Dias |
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Institution: | (1) Departamento de Biologia Geral, Universidade Estadual de Londrina, Caixa Postal 6001, CEP 86051-990 Londrina, PR, Brasil |
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Abstract: | Eighteen specimens of Pimelodus maculatus collected from Tibagi River (Sertaneja, PR, Brazil) were analyzed cytogenetically. The diploid number of 56 chromosomes was
observed and karyotype was 20 M + 20 SM + 10 ST + 6 A with fundamental number (FN) of 106. Results of analyses from the nucleolus
organizer regions (NORs), obtained by AgNO3, CMA3 and C-band staining showed marking in a terminal position on the long arm of a pair of subtelocentric chromosomes. The restriction
enzyme AluI produced a linear differentiation similar to C-banding.
This revised version was published online in July 2006 with corrections to the Cover Date. |
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Keywords: | Ag-NOR AluI C-banding CMA3 Pimelodidae Pimelodus maculatus |
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