Genomic diversity and admixture differs for Stone-Age Scandinavian foragers and farmers.

Bibliographic Collection: 
Publication Type: Journal Article
Authors: Skoglund, Pontus; Malmström, Helena; Omrak, Ayça; Raghavan, Maanasa; Valdiosera, Cristina; Günther, Torsten; Hall, Per; Tambets, Kristiina; Parik, Jüri; Sjögren, Karl-Göran; Apel, Jan; Willerslev, Eske; Storå, Jan; Götherström, Anders; Jakobsson, Mattias
Year of Publication: 2014
Journal: Science
Volume: 344
Issue: 6185
Pagination: 747-50
Date Published: 2014 May 16
Publication Language: eng
ISSN: 1095-9203
Keywords: Agriculture, DNA, Mitochondrial, European Continental Ancestry Group, Genetic Variation, Genome, Human, Genomics, History, Ancient, Humans, Scandinavian and Nordic Countries

Prehistoric population structure associated with the transition to an agricultural lifestyle in Europe remains a contentious idea. Population-genomic data from 11 Scandinavian Stone Age human remains suggest that hunter-gatherers had lower genetic diversity than that of farmers. Despite their close geographical proximity, the genetic differentiation between the two Stone Age groups was greater than that observed among extant European populations. Additionally, the Scandinavian Neolithic farmers exhibited a greater degree of hunter-gatherer-related admixture than that of the Tyrolean Iceman, who also originated from a farming context. In contrast, Scandinavian hunter-gatherers displayed no significant evidence of introgression from farmers. Our findings suggest that Stone Age foraging groups were historically in low numbers, likely owing to oscillating living conditions or restricted carrying capacity, and that they were partially incorporated into expanding farming groups.

DOI: 10.1126/science.1253448
Alternate Journal: Science