From Genes to Graves: Linking Polygenic Selection to Archaeological Evidence of Behavioral Change

One of the most tantalizing yet frustrating findings from papers like Akbari et al. (2024) and Piffer (2025) is the detection of selection on alleles that today are associated with cognitive performance, risk-taking, or social behavior. The authors point out the huge uncertainty about what these alleles actually did for someone living 5,000 years ago. This research idea flips the script by starting with aDNA evidence of selection and then asking what was happening culturally at that exact time and place. For example, if there is a strong selection signal on dopamine-related pathways circa 3,000 BCE, the project would collaborate with archaeologists to examine sites for evidence of new technologies, trade routes, settlement changes, or novel rituals that might have rewarded different behavioral traits. This approach tackles the "portability" problem by grounding genetic inferences in archaeological context, creating a more robust and testable model of gene-culture co-evolution.

References:

1. Pervasive findings of directional selection realize the promise of ancient DNA to elucidate human adaptation. Ali Akbari, Allison R. Barton, S. Gazal, Zheng Li, Mohammadreza Kariminejad, Annabel Perry, Yating Zeng, Alissa Mittnik, Nick Patterson, Matthew Mah, Xiang Zhou, Alkes L. Price, Eric S. Lander, R. Pinhasi, N. Rohland, Swapan Mallick, D. Reich (2024). bioRxiv.
2. Directional Selection and Evolution of Polygenic Traits in Eastern Eurasia: Insights from Ancient DNA. Davide Piffer (2025). Twin Research and Human Genetics.