6533b7cffe1ef96bd1258c71
RESEARCH PRODUCT
Karyotype analyses reveal inter-individual polymorphism and association of nucleolus-organizer-carrying chromosomes in Capros aper (Pisces: Zeiformes)
F. LafargueR. Vitturisubject
GeneticsEcologybiologyNucleolusChromosomeKaryotypeAquatic Sciencebiology.organism_classificationZeiformesEvolutionary biologyShort armsPolymorphism (computer science)Nucleolus organizer regionMetaphaseEcology Evolution Behavior and Systematicsdescription
Three different karyomorphs with 2n=46, 2n=44 and 2n=42 for Capros aper (L., 1758) (Zeiformes) collected from the Gulf of Lion, near Banyuls-sur-Mer, France, in July 1990 were determined. Karyomorphs were characterized by the same arm number [Fundamental number (FN)=50], suggesting that chromosome variations are due to Robertsonian fusions. In somatic metaphase spreads stained with silver nitrate, nucleolus organizer regions (NORs) consistently occupied a terminal position on the short arms of two small submetacentric chromosomes. Ca. 30% of silver-stained metaphases in each specimen showed NOR chromosomes associated in pairs by their nucleolus organizer regions.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1992-01-01 | Marine Biology |