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Journal Article
The genomic history of southeastern Europe
2018
Overview
Farming was first introduced to Europe in the mid-seventh millennium
bc,
and was associated with migrants from Anatolia who settled in the southeast before spreading throughout Europe. Here, to understand the dynamics of this process, we analysed genome-wide ancient DNA data from 225 individuals who lived in southeastern Europe and surrounding regions between 12000 and 500
bc
. We document a west–east cline of ancestry in indigenous hunter-gatherers and, in eastern Europe, the early stages in the formation of Bronze Age steppe ancestry. We show that the first farmers of northern and western Europe dispersed through southeastern Europe with limited hunter-gatherer admixture, but that some early groups in the southeast mixed extensively with hunter-gatherers without the sex-biased admixture that prevailed later in the north and west. We also show that southeastern Europe continued to be a nexus between east and west after the arrival of farmers, with intermittent genetic contact with steppe populations occurring up to 2,000 years earlier than the migrations from the steppe that ultimately replaced much of the population of northern Europe.
Genome-wide ancient DNA data from 225 individuals who lived in southeastern Europe between 12000 and 500
bc
reveals that the region acted as a genetic crossroads before and after the arrival of farming.
European farmers' first strides from the south
The early spread of farmers across Europe has previously been thought to be part of a single migration event. David Reich and colleagues analyse genome-wide data from 225 individuals who lived in southeastern Europe and the surrounding regions between 12000 and 500
BC
. They analyse this in combination with previous genomic datasets to characterize genetic structure and update existing models of the spread of farming into and across Europe. They find that southeastern Europe served as a contact zone between east and west, with interactions between diverged groups of hunter-gatherers starting before the arrival of farming. The authors also find evidence for male-biased admixture between hunter-gatherers and farmers in central Europe during the Middle Neolithic. Elsewhere in this issue, David Reich and colleagues report genomic insights into the Beaker culture—characterized by the use of a distinctive pottery style during the end of the Neolithic—based on genome-wide data from 400 Neolithic, Copper Age and Bronze Age Europeans, from 136 different archaeological sites, and including 226 Beaker-associated individuals.
