Comparative Genome Analysis of the Primary Sex-Determining Locus in Salmonid Fishes
書誌事項
- 公開日
- 2003-02-01
- DOI
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- 10.1101/gr.578503
- 公開者
- Cold Spring Harbor Laboratory
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説明
<jats:p>We compared the Y-chromosome linkage maps for four salmonid species (Arctic charr, <jats:italic>Salvelinus alpinus</jats:italic>; Atlantic salmon, <jats:italic>Salmo salar</jats:italic>; brown trout, <jats:italic>Salmo trutta</jats:italic>; and rainbow trout,<jats:italic>Oncorhynchus mykiss</jats:italic>) and a putative Y-linked marker from lake trout (<jats:italic>Salvelinus namaycush</jats:italic>). These species represent the three major genera within the subfamily Salmoninae of the Salmonidae. The data clearly demonstrate that different Y-chromosomes have evolved in each of the species. Arrangements of markers proximal to the sex-determining locus are preserved on homologous, but different, autosomal linkage groups across the four species studied in detail. This indicates that a small region of DNA has been involved in the rearrangement of the sex-determining region. Placement of the sex-determining region appears telomeric in brown trout, Atlantic salmon, and Arctic charr, whereas an intercalary location for<jats:italic>SEX</jats:italic> may exist in rainbow trout. Three hypotheses are proposed to account for the relocation: translocation of a small chromosome arm; transposition of the sex-determining gene; or differential activation of a primary sex-determining gene region among the species.</jats:p>
収録刊行物
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- Genome Research
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Genome Research 13 (2), 272-280, 2003-02-01
Cold Spring Harbor Laboratory