Population genomics of post-glacial western Eurasia
View abstract on PubMed
Summary
This summary is machine-generated.Ancient human genome sequencing reveals a genomic divide in Western Eurasia. Migrations, including the Yamnaya expansion, caused major population turnovers and reshaped genetic diversity across the continent.
Area Of Science
- Paleogenomics
- Human Evolution
- Population Genetics
Background
- Western Eurasia experienced significant human migrations throughout the Holocene.
- Understanding the genetic impact of these movements is crucial for reconstructing population history.
Purpose Of The Study
- To investigate the cross-continental genetic effects of Holocene human migrations in Eurasia.
- To analyze ancient genomes from Mesolithic and Neolithic periods to identify population dynamics.
Main Methods
- Shotgun sequencing of 317 ancient genomes from northern and western Eurasia.
- Imputation with published data to generate over 1,600 diploid genotypes.
- Analysis of genomic data to identify ancestry shifts and relatedness patterns.
Main Results
- A 'great divide' genomic boundary was identified between the Black Sea and the Baltic.
- Mesolithic populations were genetically distinct east and west of this boundary.
- Neolithization led to substantial ancestry replacement in the west but not the east.
- Yamnaya-related ancestry spread around 5,000 BP, causing a second major population turnover across Eurasia.
- Hunter-gatherers from the Middle Don region contributed ancestry to the Yamnaya.
Conclusions
- Prehistoric migrations profoundly and lastingly impacted Eurasian genetic diversity.
- The Yamnaya expansion played a key role in reshaping the genetic landscape of Western Eurasia.
- Distinct Mesolithic populations and differential responses to Neolithization shaped early Eurasian genetic structure.
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