PMID- 18689886 OWN - NLM STAT- MEDLINE DCOM- 20081112 LR - 20211020 IS - 0016-6731 (Print) IS - 0016-6731 (Linking) VI - 179 IP - 4 DP - 2008 Aug TI - Molecular cytogenetic evidence of rearrangements on the Y chromosome of the threespine stickleback fish. PG - 2173-82 LID - 10.1534/genetics.108.088559 [doi] AB - To identify the processes shaping vertebrate sex chromosomes during the early stages of their evolution, it is necessary to study systems in which genetic sex determination was recently acquired. Previous cytogenetic studies suggested that threespine stickleback fish (Gasterosteus aculeatus) do not have a heteromorphic sex chromosome pair, although recent genetic studies found evidence of an XY genetic sex-determination system. Using fluorescence in situ hybridization (FISH), we report that the threespine stickleback Y chromosome is heteromorphic and has suffered both inversions and deletion. Using the FISH data, we reconstruct the rearrangements that have led to the current physical state of the threespine stickleback Y chromosome. These data demonstrate that the threespine Y is more degenerate than previously thought, suggesting that the process of sex chromosome evolution can occur rapidly following acquisition of a sex-determining region. FAU - Ross, Joseph A AU - Ross JA AD - Division of Human Biology, Fred Hutchinson Cancer Research Center, Seattle, Washington 98101, USA. FAU - Peichel, Catherine L AU - Peichel CL LA - eng GR - P50 HG-02568/HG/NHGRI NIH HHS/United States GR - T32 GM007270/GM/NIGMS NIH HHS/United States GR - R01 GM071854/GM/NIGMS NIH HHS/United States GR - T32 GM-07270/GM/NIGMS NIH HHS/United States GR - R01 GM-071854/GM/NIGMS NIH HHS/United States GR - P50 HG002568/HG/NHGRI NIH HHS/United States PT - Journal Article PT - Research Support, N.I.H., Extramural DEP - 20080809 PL - United States TA - Genetics JT - Genetics JID - 0374636 SB - IM MH - Animals MH - *Chromosome Deletion MH - *Chromosome Inversion MH - Chromosome Mapping MH - Chromosomes, Artificial, Bacterial MH - Evolution, Molecular MH - Female MH - In Situ Hybridization, Fluorescence MH - Karyotyping MH - Male MH - Sex Determination Processes MH - Smegmamorpha/*genetics MH - *Y Chromosome PMC - PMC2516089 EDAT- 2008/08/12 09:00 MHDA- 2008/11/13 09:00 PMCR- 2008/11/01 CRDT- 2008/08/12 09:00 PHST- 2008/08/12 09:00 [pubmed] PHST- 2008/11/13 09:00 [medline] PHST- 2008/08/12 09:00 [entrez] PHST- 2008/11/01 00:00 [pmc-release] AID - genetics.108.088559 [pii] AID - gen17942173 [pii] AID - 10.1534/genetics.108.088559 [doi] PST - ppublish SO - Genetics. 2008 Aug;179(4):2173-82. doi: 10.1534/genetics.108.088559. Epub 2008 Aug 9.