PMID- 21921583 OWN - NLM STAT- MEDLINE DCOM- 20120105 LR - 20211020 IS - 1424-859X (Electronic) IS - 1424-8581 (Print) IS - 1424-8581 (Linking) VI - 135 IP - 2 DP - 2011 TI - Karyotype differentiation between two stickleback species (Gasterosteidae). PG - 150-9 LID - 10.1159/000331232 [doi] AB - The stickleback family (Gasterosteidae) of fish is less than 40 million years old, yet stickleback species have diverged in both diploid chromosome number (2n) and morphology. We used comparative fluorescence in situ hybridization (FISH) on 2 stickleback species, Gasterosteus aculeatus (2n = 42) and Apeltes quadracus (2n = 46), to ascertain the types of chromosome rearrangements that differentiate these species. The A. quadracus karyotype contains more acrocentric and telocentric chromosomes than the G. aculeatus karyotype. By using bacterial artificial chromosome probes from G. aculeatus in our FISH screen, we found that 6 pericentric inversions and 2 chromosome fusions/fissions are responsible for the greater number of acrocentric and telocentric chromosomes in A. quadracus. While most populations of G. aculeatus have an XX/XY sex chromosome system, A. quadracus has a ZZ/ZW sex chromosome system, as previously reported. However, we discovered that a population of A. quadracus from Connecticut lacks heteromorphic sex chromosomes, providing evidence for unexpected sex chromosome diversity in this species. CI - Copyright (c) 2011 S. Karger AG, Basel. FAU - Urton, J R AU - Urton JR AD - Division of Human Biology, Fred Hutchinson Cancer Research Center, Seattle, WA 98109-1024, USA. FAU - McCann, S R AU - McCann SR FAU - Peichel, C L AU - Peichel CL LA - eng GR - R01 GM089733/GM/NIGMS NIH HHS/United States GR - T32 HG000035/HG/NHGRI NIH HHS/United States GR - R01 GM071854/GM/NIGMS NIH HHS/United States GR - T32 HG00035/HG/NHGRI NIH HHS/United States GR - P50 HG002568/HG/NHGRI NIH HHS/United States PT - Journal Article PT - Research Support, N.I.H., Extramural DEP - 20110913 PL - Switzerland TA - Cytogenet Genome Res JT - Cytogenetic and genome research JID - 101142708 SB - IM MH - Animals MH - Centromere/*genetics MH - *Chromosome Inversion MH - Chromosomes/*genetics MH - Diploidy MH - Female MH - Genetic Variation MH - In Situ Hybridization, Fluorescence MH - Karyotype MH - Male MH - Phylogeny MH - Sex Chromosomes/genetics MH - Smegmamorpha/classification/*genetics MH - Species Specificity MH - Spectral Karyotyping PMC - PMC3224509 EDAT- 2011/09/17 06:00 MHDA- 2012/01/06 06:00 PMCR- 2012/10/01 CRDT- 2011/09/17 06:00 PHST- 2011/07/04 00:00 [accepted] PHST- 2011/09/17 06:00 [entrez] PHST- 2011/09/17 06:00 [pubmed] PHST- 2012/01/06 06:00 [medline] PHST- 2012/10/01 00:00 [pmc-release] AID - 000331232 [pii] AID - cgr0135-0150 [pii] AID - 10.1159/000331232 [doi] PST - ppublish SO - Cytogenet Genome Res. 2011;135(2):150-9. doi: 10.1159/000331232. Epub 2011 Sep 13.