Coancestry superposed on admixed populations yields measures of relatedness at individual-level resolution
2024
New Model for Understanding Relatedness in Mixed Populations
publication
Evidence: moderate
Author Information
Author(s): Chen Danfeng, Storey John D.
Primary Institution: Cold Spring Harbor Laboratory
Hypothesis
Can a generalized model of admixture that accounts for relatedness among admixed populations provide better estimates of individual-level relatedness?
Conclusion
The super admixture model captures a new and important component of evolutionary history and structure in admixed populations.
Supporting Evidence
- The super admixture model provides a one-to-one mapping with the population-level kinship model.
- The method is computationally efficient and scales to massive sample sizes.
- The fitted model estimates relatedness between all pairs of individuals at a resolution similar to the kinship model.
Takeaway
This study introduces a new way to understand how related people are in mixed groups, which helps us learn more about their history.
Methodology
The study introduces a method based on the method of moments to estimate a super admixture model.
Digital Object Identifier (DOI)
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