Differences in local population history at the finest level: the case of the Estonian population - Archive ouverte HAL Access content directly
Journal Articles European Journal of Human Genetics Year : 2020

Differences in local population history at the finest level: the case of the Estonian population

Abstract

Several recent studies detected fine-scale genetic structure in human populations. Hence, groups conventionally treated as single populations harbour significant variation in terms of allele frequencies and patterns of haplotype sharing. It has beenshown that these findings should be considered when performing studies of genetic associations and natural selection, especially when dealing with polygenic phenotypes. However, there is little understanding of the practical effects of such genetic structure on demography reconstructions and selection scans when focusing on recent population history. Here we tested the impact of population structure on such inferences using high-coverage (~30×) genome sequences of 2305 Estonians. We show that different regions of Estonia differ in both effective population size dynamics and signatures of natural selection. By analyzing identity-by-descent segments we also reveal that some Estonian regions exhibit evidence of abottleneck 10–15 generations ago reflecting sequential episodes of wars, plague and famine, although this signal is virtually undetected when treating Estonia as a single population. Besides that, we provide a framework for relating effective population size estimated from genetic data to actual census size and validate it on the Estonian population. This approach may be widely used both to cross-check estimates based on historical sources as well as to get insight into times and/or regions with no other information available. Our results suggest that the history of human populations within the last fewmillennia can be highly region specific and cannot be properly studied without taking local genetic structure into account.
Fichier principal
Vignette du fichier
Pankratov_et_al._reviewed_figures_FINAL_with_header.pdf (5.53 Mo) Télécharger le fichier
Origin Files produced by the author(s)

Dates and versions

hal-02942330 , version 1 (25-11-2020)

Identifiers

Cite

Vasili Pankratov, Francesco Montinaro, Alena Kushniarevich, Georgi Hudjashov, Flora Jay, et al.. Differences in local population history at the finest level: the case of the Estonian population. European Journal of Human Genetics, 2020, ⟨10.1038/s41431-020-0699-4⟩. ⟨hal-02942330⟩
109 View
48 Download

Altmetric

Share

Gmail Mastodon Facebook X LinkedIn More