Analyses of nucleolus organizer regions and heterochromatin of Pimelodus maculatus (Pisces, Pimelodidae)

Analyses of nucleolus organizer regions and heterochromatin of Pimelodus maculatus (Pisces, Pimelodidae)

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 orga...

Ausführliche Beschreibung

Gespeichert in:
Bibliographische Detailangaben
Veröffentlicht in:Genetica 2000-01, Vol.110 (1), p.97-100
Hauptverfasser: Swarça, A C, Giuliano-Caetano, L, Dias, A L
Format: Artikel
Sprache:eng
Schlagworte:
Animals
Chromosomes
Deoxyribonucleases, Type II Site-Specific - metabolism
Fishes - genetics
Freshwater
Heterochromatin - genetics
Karyotypes
Karyotyping
Nucleolus Organizer Region
Online-Zugang:Volltext
Tags: Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
Beschreibung
Zusammenfassung: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.
ISSN:0016-6707
1573-6857
DOI:10.1023/A:1017960501479