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No Evidence for a Pseudoautosomal Locus for Schizophrenia: Linkage Analysis of Multiply Affected Families

  • P. Asherson (a1), E. Parfitt (a2), M. Sargeant (a3), S. Tidmarsh (a4), P. Buckland (a4), C. Taylor (a5), A. Clements (a6), M. Gill (a6), P. Mcguffin (a4) and M. Owen (a7)...
Abstract

Evidence for a pseudoautosomal locus for a schizophrenia susceptibility gene was sought by two forms of analysis of 25 multiply affected families. Firstly, in the sample as a whole there was an excess of same-sex over mixed-sex siblings compared with that expected. Secondly, linkage analysis was performed in six of the families. The genotypes were studied for DXYS14, a highly polymorphic marker in the telomeric pseudoautosomal region. No evidence for positive linkage was found with two-point analysis under eight different genetic models for the mode of transmission. A non-parametric, sibling-pair analysis also failed to detect linkage. Our findings provide no evidence for linkage within the pseudoautosomal region; same-sex concordance must arise from some other mechanism.

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The British Journal of Psychiatry
  • ISSN: 0007-1250
  • EISSN: 1472-1465
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No Evidence for a Pseudoautosomal Locus for Schizophrenia: Linkage Analysis of Multiply Affected Families

  • P. Asherson (a1), E. Parfitt (a2), M. Sargeant (a3), S. Tidmarsh (a4), P. Buckland (a4), C. Taylor (a5), A. Clements (a6), M. Gill (a6), P. Mcguffin (a4) and M. Owen (a7)...
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