tstrait: a quantitative trait simulator for ancestral recombination graphs

Author:

Tagami DaikiORCID,Bisschop GertjanORCID,Kelleher JeromeORCID

Abstract

AbstractSummaryAncestral recombination graphs (ARGs) encode the ensemble of correlated genealogical trees arising from recombination in a compact and efficient structure, and are of fundamental importance in population and statistical genetics. Recent breakthroughs have made it possible to simulate and infer ARGs at biobank scale, and there is now intense interest in using ARG-based methods across a broad range of applications, particularly in genome-wide association studies (GWAS). Sophisticated methods exist to simulate ARGs using population genetics models, but there is currently no software to simulate quantitative traits directly from these ARGs. To apply existing quantitative trait simulators users must export genotype data, losing important information about ancestral processes and producing prohibitively large files when applied to the biobank-scale datasets currently of interest in GWAS. We presenttstrait, an open-source Python library to simulate quantitative traits on ARGs, and show how this user-friendly software can quickly simulate phenotypes for biobank-scale datasets on a laptop computer.Availability and Implementationtstraitis available for download on the Python Package Index. Full documentation with examples and workflow templates is available onhttps://tskit.dev/tstrait/docs/, and the development version is maintained on GitHub (https://github.com/tskit-dev/tstrait).Contactdaiki.tagami@hertford.ox.ac.uk

Publisher

Cold Spring Harbor Laboratory

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