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Chromosome banding and molecular cytogenetic study of two Mediterranean trachinoid fish species (Teleostei: Trachinidae, Uranoscopidae)
- Source :
- Cytogenetic and Genome Research. 103:139-143
- Publication Year :
- 2003
- Publisher :
- S. Karger AG, 2003.
-
Abstract
- The chromosomes of Echiichthys vipera (Trachinidae) and Uranoscopus scaber (Uranoscopidae) were analyzed by means of various banding methods and fluorescence in situ hybridization (FISH) with telomeric and major rDNA probes, respectively. The karyotype of E. vipera was composed of 48 acrocentric chromosomes and NOR sites, as revealed by all detection methods, were situated pericentromerically on a single pair of middle-sized chromosomes. Blocks of constitutive heterochromatin were present in the pericentromeric regions of all pairs of chromosomes. The karyotype of U. scaber showed three karyomorphs: 2n = 30 (18 m + 12 a/st [m = metacentric, a = acrocentric and st = subtelocentric]), 2n = 28 (20 m + 8 a/st), 2n = 27 (21 m + 6 a/st). NORs, as revealed by FISH, were situated pericentromerically on a single pair of middle-sized chromosomes in spite of Ag-positive signals in the centromeres of all pairs of chromosomes. Robertsonian fusions were hypothesized for observed variation due to invariable number of chromosome arms FN = 48.
- Subjects :
- medicine.medical_specialty
Biology
Chromosomes
Heterochromatin
Centromere
Mediterranean Sea
Nucleolus Organizer Region
Genetics
medicine
Animals
Constitutive heterochromatin
Molecular Biology
In Situ Hybridization, Fluorescence
Metaphase
Genetics (clinical)
Teleostei
medicine.diagnostic_test
Cytogenetics
Chromosome
Karyotype
biology.organism_classification
Molecular biology
Chromosome Banding
Perciformes
Vipera
Karyotyping
Cytogenetic Analysis
Fluorescence in situ hybridization
Subjects
Details
- ISSN :
- 1424859X and 14248581
- Volume :
- 103
- Database :
- OpenAIRE
- Journal :
- Cytogenetic and Genome Research
- Accession number :
- edsair.doi.dedup.....ae2d2d725829882adfe8961195f4b785