Distribution of local ancestry and evidence of adaptation in admixed populations.
Journal
Scientific reports
ISSN: 2045-2322
Titre abrégé: Sci Rep
Pays: England
ID NLM: 101563288
Informations de publication
Date de publication:
25 09 2019
25 09 2019
Historique:
received:
02
01
2019
accepted:
11
09
2019
entrez:
27
9
2019
pubmed:
27
9
2019
medline:
28
10
2020
Statut:
epublish
Résumé
Admixed American populations have different global proportions of European, Sub-Saharan African, and Native-American ancestry. However, individuals who display the same global ancestry could exhibit remarkable differences in the distribution of local ancestry blocks. We studied for the first time the distribution of local ancestry across the genome of 264 Brazilian admixed individuals, ascertained within the scope of the Brazilian Initiative on Precision Medicine. We found a decreased proportion of European ancestry together with an excess of Native-American ancestry on chromosome 8p23.1 and showed that this is due to haplotypes created by chromosomal inversion events. Furthermore, Brazilian non-inverted haplotypes were more similar to Native-American haplotypes than to European haplotypes, in contrast to what was found in other American admixed populations. We also identified signals of recent positive selection on chromosome 8p23.1, and one gene within this locus, PPP1R3B, is related to glycogenesis and has been associated with an increased risk of type 2 diabetes and obesity. These findings point to a selection event after admixture, which is still not entirely understood in recent admixture events.
Identifiants
pubmed: 31554886
doi: 10.1038/s41598-019-50362-2
pii: 10.1038/s41598-019-50362-2
pmc: PMC6761108
doi:
Substances chimiques
Protein Phosphatase 1
EC 3.1.3.16
Types de publication
Journal Article
Research Support, Non-U.S. Gov't
Langues
eng
Sous-ensembles de citation
IM
Pagination
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