Identification of the Y chromosome in chinook salmon (Oncorhynchus tshawytscha)

Cytogenet Cell Genet. 2001;92(1-2):108-10. doi: 10.1159/000056878.


The Y chromosome in chinook salmon, Oncorhynchus tshawytscha, was identified using fluorescence in situ hybridization (FISH) with a probe to a male-specific repetitive sequence isolated from this species. The probe highlights the distal end of the short arm of an acrocentric chromosome with a DAPI-bright interstitial band of variable size. The proximal portion of the short arm of the Y chromosome contains 5S rDNA sequences, which are also found on the short arms of six other acrocentric chromosomes in this species.

MeSH terms

  • Animals
  • British Columbia
  • DNA Probes / genetics
  • In Situ Hybridization, Fluorescence
  • Indoles
  • Karyotyping
  • Male
  • RNA, Ribosomal, 5S / genetics
  • Salmon / genetics*
  • Substrate Specificity
  • Y Chromosome / genetics*


  • DNA Probes
  • Indoles
  • RNA, Ribosomal, 5S
  • DAPI