Interactive exploration of biobank-scale ancestral recombination graphs with Lorax

Abstract Ancestral Recombination Graphs (ARGs) underpin analyses of natural selection, disease association, and population history but remain difficult to explore at biobank scale. We introduce Lorax, a GPU-accelerated, web-native platform for real-time visualization of population-scale ARGs. Lorax integrates genomic position, coalescent time, local genealogy, and metadata, enabling interactive exploration of ancestry and variant inheritance in biobank-scale datasets.