[4] Natural flooding can cause genetic admixture within populations of migrating fish species.
The method attempts to correlate the degree of ancestry near a genetic locus with the phenotype or disease of interest.
Genetic markers that differ in frequency between the ancestral populations are needed across the genome.
The first admixture scans were published in 2005 and since then genetic contributors to a variety of disease and trait differences have been mapped.
[8] By 2010, high-density mapping panels had been constructed for African Americans, Latino/Hispanics, and Uyghurs.