Fig. 3.

Karyotype of the brook trout (Salvelinus fontinalis) arranged from silver-stained (top row) and chromomycin A₃-stained (CMA₃) (bottom row) chromosomes (a). Chromosome pairs bearing 28S rDNA are framed, and the chromosome pair with 5S rDNA on the p arm is indicated with asterisk. Examples of the chromosome pairs Nos. 3 (b) and 29 (c) showing size polymorphism of GC-rich blocks stained with CMA₃ and chromosome No. 11 (d) displaying internal telomeric site after telomere PNA hybridization (in the middle, DAPI on the left) which coincided with active NOR (AgNO₃ staining on the right). Scale bar = 10 µm