Genome-wide scan demonstrates significant linkage for male sexual orientation

A. R. Sanders, E. R. Martin, G. W. Beecham, S. Guo, K. Dawood, G. Rieger, J. A. Badner, E. S. Gershon, R. S. Krishnappa, A. B. Kolundzija, J. Duan, P. V. Gejman, J. M. Bailey

Research output: Contribution to journalArticlepeer-review

61 Scopus citations

Abstract

Background Findings from family and twin studies support a genetic contribution to the development of sexual orientation in men. However, previous studies have yielded conflicting evidence for linkage to chromosome Xq28. Method We conducted a genome-wide linkage scan on 409 independent pairs of homosexual brothers (908 analyzed individuals in 384 families), by far the largest study of its kind to date. Results We identified two regions of linkage: the pericentromeric region on chromosome 8 (maximum two-point LOD = 4.08, maximum multipoint LOD = 2.59), which overlaps with the second strongest region from a previous separate linkage scan of 155 brother pairs; and Xq28 (maximum two-point LOD = 2.99, maximum multipoint LOD = 2.76), which was also implicated in prior research. Conclusions Results, especially in the context of past studies, support the existence of genes on pericentromeric chromosome 8 and chromosome Xq28 influencing development of male sexual orientation.

Original languageEnglish (US)
Pages (from-to)1379-1388
Number of pages10
JournalPsychological medicine
Volume45
Issue number7
DOIs
StatePublished - May 28 2015

Keywords

  • Chromosome 8
  • chromosome Xq28
  • complex trait
  • genome-wide linkage scan
  • human
  • male sexual orientation.

ASJC Scopus subject areas

  • Applied Psychology
  • Psychiatry and Mental health

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