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The study of the genetic structure of populations, including the analysis of Y-chromosome haplogroups and subclades.
The clearest peer‑reviewed population‑genetics paper in the provided material that maps including U106 at regional resolution is the PMC study "A major Y‑chromosome haplogroup R1b Holocene era founder...
(also styled R-L48 or R1b1a2a1a1a4) is a subclade of the R1b Y‑chromosome family most closely nested under R1b-U106, defined by SNPs L48 and S162, and is widely discussed as a North‑West European — pa...
The precise label 1a1b1a1a1c2b2 does not appear in the supplied reporting, so the sources cannot identify which modern population “scores the highest” for that exact subclade; however, the broader in ...