Differential Staining of Chromosomes of Two Salmonoid Species, Salvelinus leucomaenis (Pallas) and Salvelinus malma (Walbaum)

Abstract

The Q-band and C-band patterns of chromosomes are investigated in two species of the Salmonidae, Salvelinus leucomaenis (2n, 84) and S. malma (2n, 82). The two species differ by the numbers of acrocentrics and subtelocentrics. The Q-banded chromosomes of both species showed rather faint and poorly differentiated fluorescence, except for brighter centromeric and/or telomitic regions of certain chromosomes. Most of Q-band positive regions in both species correspond to the location of constitutive heterochromatin as revealed by the C-staining procedure. No sexual dimorphism is observed in terms of both the Q- and C-band patterns here concerned.