Characterization of the karyotype of the tench (Tinca tinca L.) and analysis of its chromosomal heterochromatic regions by C-banding, Ag-staining, and restriction endonuclease banding
- 1 January 1993
- journal article
- animal cytogenetics-and-comparative-mapping
- Published by S. Karger AG in Cytogenetic and Genome Research
- Vol. 62 (4) , 220-223
- https://doi.org/10.1159/000133481
Abstract
Beginning with a description of the conventional Giemsa-stained karyotype of the tench (Tinea tinea L.), the structure and variability of the chromosomal heterochromatic regions in this cyprinid species were analyzed by means of C-, silver-, and restriction endonuclease banding. Silver staining revealed active nucleolus organizer regions (NORs) on the secondary constriction of chromosome pair 3. Constitutive heterochromatin was associated with NOR regions detected by C-banding. Restriction endonuclease digestion with AluI, TaqI, and HaeIII induced specific banding patterns that allowed identification of homologous chromosome pairs and revealed features about the sequence composition of several chromosomal heterochromatic regions and of the NOR-associated heterochromatin.Keywords
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