Further insight into the global variability of the OCA2-HERC2 locus for human pigmentation from multiallelic markers.

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Version: Final published version
License: CC BY 4.0
Serval ID
serval:BIB_10AF8DB19C52
Type
Article: article from journal or magazin.
Collection
Publications
Institution
Title
Further insight into the global variability of the OCA2-HERC2 locus for human pigmentation from multiallelic markers.
Journal
Scientific reports
Author(s)
Suarez P., Baumer K., Hall D.
ISSN
2045-2322 (Electronic)
ISSN-L
2045-2322
Publication state
Published
Issued date
18/11/2021
Peer-reviewed
Oui
Volume
11
Number
1
Pages
22530
Language
english
Notes
Publication types: Journal Article
Publication Status: epublish
Abstract
The OCA2-HERC2 locus is responsible for the greatest proportion of eye color variation in humans. Numerous studies extensively described both functional SNPs and associated patterns of variation over this region. The goal of our study is to examine how these haplotype structures and allelic associations vary when highly variable markers such as microsatellites are used. Eleven microsatellites spanning 357 Kb of OCA2-HERC2 genes are analyzed in 3029 individuals from worldwide populations. We found that several markers display large differences in allele frequency (10% to 35% difference) among Europeans, East Asians and Africans. In Europe, the alleles showing increased frequency can also discriminate individuals with (IrisPlex) predicted blue and brown eyes. Distinct haplotypes are identified around the variants C and T of the functional SNP rs12913832 (associated to blue eyes), with linkage disequilibrium r <sup>2</sup> values significant up to 237 Kb. The haplotype carrying the allele rs12913832 C has high frequency (76%) in blue eye predicted individuals (30% in brown eye predicted individuals), while the haplotype associated to the allele rs12913832 T is restricted to brown eye predicted individuals. Finally, homozygosity values reach levels of 91% near rs12913832. Odds ratios show values of 4.2, 7.4 and 10.4 for four markers around rs12913832 and 7.1 for their core haplotype. Hence, this study provides an example on the informativeness of multiallelic markers that, despite their current limited potential contribution to forensic eye color prediction, supports the use of microsatellites for identifying causing variants showing similar genetic features and history.
Pubmed
Web of science
Open Access
Yes
Create date
06/12/2021 9:21
Last modification date
18/12/2021 8:08
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