ArticleProceedings of the National Academy of Sciences of the United States of America2026
Sudan's complex genetic admixture history drives adaptation to malaria in Sudanese Copts.
Article in Proceedings of the National Academy of Sciences of the United States of America, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Sudan lies at the crossroads of Africa and the Middle East, with rich cultural, linguistic, and ecological diversity shaped by a complex demographic history. We present a whole-genome sequencing (WGS) study of Sudanese populations, analyzing high-coverage genomes (~30×) from 125 individuals representing five ethnolinguistic groups across three language families. Our results reveal deep population structure, involving Nilo-Saharan, West Eurasian, Northern African, and Western African ancestral components, as well as signatures of the Arab expansion. We report over one million novel variants, including population-specific deleterious alleles, highlighting the need for broader African genomic representation. Notably, local ancestry inference reveals a strong signal of adaptive admixture on chromosome 1 in Sudanese Copts, marked by a peak of Nilo-Saharan ancestry introduced via genetic admixture 1,000 to 1,500 y ago. At this locus, we estimate a remarkably strong selection coefficient (s = 0.0996) for SNP rs2814778 within the
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