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Review
. 2018 Apr;19(4):220-234.
doi: 10.1038/nrg.2017.109. Epub 2018 Jan 15.

Runs of homozygosity: windows into population history and trait architecture

Francisco C Ceballos  1   2 , Peter K Joshi  3 , David W Clark  3 , Michèle Ramsay  1   4 , James F Wilson  2   3
Affiliations
Review

Runs of homozygosity: windows into population history and trait architecture

Francisco C Ceballos et al. Nat Rev Genet. 2018 Apr.

Abstract

Long runs of homozygosity (ROH) arise when identical haplotypes are inherited from each parent and thus a long tract of genotypes is homozygous. Cousin marriage or inbreeding gives rise to such autozygosity; however, genome-wide data reveal that ROH are universally common in human genomes even among outbred individuals. The number and length of ROH reflect individual demographic history, while the homozygosity burden can be used to investigate the genetic architecture of complex disease. We discuss how to identify ROH in genome-wide microarray and sequence data, their distribution in human populations and their application to the understanding of inbreeding depression and disease risk.

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