1. Chromosomal studies on ten species of notothenioid fishes (Notothenioidei: Bathydraconidae, Channichthyidae, Nototheniidae)
- Author
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Vincenzo Caputo, Ettore Olmo, Andrea Splendiani, P. Nisi Cerioni, Gaetano Odierna, Teresa Capriglione, Caputo, V., NESI CERIONI, P., Splendiani, A., Capriglione, Teresa, Odierna, Gaetano, Olmo, E., Caputo, V, NISI CERIONI, P, and Splendiani, A
- Subjects
Silver Staining ,Heterochromatin ,Antarctic Regions ,Notothenioidei ,Species Specificity ,Nucleolus Organizer Region ,Genetics ,Animals ,Molecular Biology ,Gene ,In Situ Hybridization ,Genetics (clinical) ,Gene Rearrangement ,Bathydraconidae ,biology ,Fishes ,Chromosome ,Telomere ,Ribosomal RNA ,biology.organism_classification ,Biological Evolution ,Channichthyidae ,Chromosome Banding ,Karyotyping ,Nototheniidae - Abstract
The results of a cytogenetic study conducted with banding and in situ hybridization techniques using ribosomal and telomeric probes on various species belonging to three families (Bathydraconidae, Channichthyidae and Nototheniidae) of the perciform suborder, Notothenioidei, are reported. The heterochromatin distribution and composition, nucleolar organiser and localisation of telomeric sequences seem to indicate that both in karyologically conservative families such as channichthyids and in families exhibiting greater karyological variability, certain DNA fractions like ribosomal genes and centromeric and telomeric DNAs are prone to some variability. This could play an important role in favouring or hampering chromosome rearrangements. Copyright (C) 2002 S. Karger AG, Basel.
- Published
- 2002
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