Karyotype analyses reveal inter-individual polymorphism and association of nucleolus-organizer-carrying chromosomes in Capros aper (Pisces: Zeiformes) |
| |
Authors: | R Vitturi F Lafargue |
| |
Institution: | (1) Institute of Zoology, University of Palermo, Via Archirafi 18, I-90123 Palermo, Italy;(2) Observatoire Oceanologique de Banyuls, Laboratoire Arago, Université P. et M. Curie (Paris VI), CNRS UA 117, F-66650 Banyuls-sur-Mer, France |
| |
Abstract: | 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. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|