Chromosome painting supports lack of homology among sex chromosomes in Oncorhynchus, Salmo, and Salvelinus (Salmonidae)

R. B. Phillips, N. R. Konkol, K. M. Reed, J. D. Stein

Research output: Contribution to journalArticlepeer-review

57 Scopus citations

Abstract

The sex chromosome pair has been identified previously as the largest submetacentric pair in the genome in several species of the genus Salvelinus (eastern trouts and chars) including S. namaycush (lake trout) and as a large subtelocentric/acrocentric pair in several species of the genus Oncorhynchus (Pacific trouts and salmon). Sex chromosomes have not been identified in Salmo (Atlantic salmon and brown trout). Two paint probes, one specific for the short arm (Yp) and the other for the long arm (Yq) of the sex chromosome pair in Salvelinus namaycush were hybridized to chromosomes of Oncorhynchus mykiss (rainbow trout) and O. tshawytscha (chinook salmon) and Salmo salar (Atlantic salmon) and S. trutta (brown trout). The two probes hybridized to two different autosomal pairs in each of the Oncorhynchus species, supporting lack of homology between the sex chromosomes in the two genera. The Yp probe hybridized to interstitial regions on two different chromosome pairs in S. salar and one pair in S. trutta. The Yq probe hybridized to a different pair in both species.

Original languageEnglish (US)
Pages (from-to)119-123
Number of pages5
JournalGenetica
Volume111
Issue number1-3
DOIs
StatePublished - Dec 1 2001

Keywords

  • Chromosome painting
  • FISH
  • Oncorhynchus
  • Salmo
  • Salmon
  • Salmonid fishes
  • Salvelinus
  • Sex chromosomes
  • Trout

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