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.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 Nat+Commun
2018 ; 9
(1
): 932
Nephropedia Template TP
gab.com Text
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English Wikipedia
Strong selection during the last millennium for African ancestry in the admixed
population of Madagascar
#MMPMID29500350
Pierron D
; Heiske M
; Razafindrazaka H
; Pereda-Loth V
; Sanchez J
; Alva O
; Arachiche A
; Boland A
; Olaso R
; Deleuze JF
; Ricaut FX
; Rakotoarisoa JA
; Radimilahy C
; Stoneking M
; Letellier T
Nat Commun
2018[Mar]; 9
(1
): 932
PMID29500350
show ga
While admixed populations offer a unique opportunity to detect selection, the
admixture in most of the studied populations occurred too recently to produce
conclusive signals. By contrast, Malagasy populations originate from admixture
between Asian and African populations that occurred ~27 generations ago,
providing power to detect selection. We analyze local ancestry across the genomes
of 700 Malagasy and identify a strong signal of recent positive selection, with
an estimated selection coefficient >0.2. The selection is for African ancestry
and affects 25% of chromosome 1, including the Duffy blood group gene. The null
allele at this gene provides resistance to Plasmodium vivax malaria, and previous
studies have suggested positive selection for this allele in the Malagasy
population. This selection event also influences numerous other genes implicated
in immunity, cardiovascular diseases, and asthma and decreases the Asian ancestry
genome-wide by 10%, illustrating the role played by selection in recent human
history.