Admixture as a source for HLA variation in Neolithic European farming communities

Author:

da Silva Nicolas AntonioORCID,Özer OnurORCID,Haller MagdalenaORCID,Chen Yan-Rong,Kolbe DanielORCID,Schade-Lindig Sabine,Wahl Joachim,Berszin Carola,Francken Michael,Görner Irina,Schierhold Kerstin,Pechtl Joachim,Grupe Gisela,Rinne Christoph,Müller Johannes,Lenz Tobias L.ORCID,Nebel Almut,Krause-Kyora BenORCID

Abstract

ABSTRACTThe northern European Neolithic is characterized by two major demographic events: immigration of early farmers (EF) from Anatolia (5500 BCE) and their admixture (from ∼4200 BCE) with western hunter-gatherers (WHG) forming late farmers (LF). The influence of this admixture event on variation in the immune-relevant human leukocyte antigen (HLA) region is understudied. Here, we conducted population and immunogenetic analyses on 83 individuals from six EF and LF sites located in present-day Germany. We observed significant shifts in HLA allele frequencies from EF to LF. The HLA diversity increased from EF to LF, likely due to admixture with WHG. However, it was considerably lower than in modern populations. Both EF and LF exhibited a relatively narrow HLA allele spectrum compared to today. This coincides with sparse traces of pathogen DNA, potentially indicating a lower pathogen pressure at the time. We additionally noted that LF resulted from sex-biased admixture from male WHG.TEASERMore restricted HLA allele spectrum and lower diversity in Neolithic farmers than in modern populations

Publisher

Cold Spring Harbor Laboratory

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