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G-Y128028
G2a6a is a downstream lineage of G2a6 that appears to have developed within the highland–foothill zones of the southern Caucasus and northwest Iran. It reflects a paternal lineage tied to the mobile herding and mixed farming communities of the late Chalcolithic and early Bronze Age. While less common today than many G2a2-derived branches, G2a6a maintains a notable presence in regions with deep prehistoric settlement continuity.
The lineage is most frequently observed in Armenia, northwest Iran, eastern Turkey, and parts of Azerbaijan. Low-frequency occurrences in northeastern Iraq and the Caspian fringe likely reflect Bronze Age and later trans-regional interactions. The geographic clustering strongly associates the lineage with highland ecological niches.
G2a6a forms the primary definable branch of G2a6, marked by Y128028. Internal phylogeny is modest, featuring regional Caucasus-centered microlineages. It stands parallel to the deeper radiations of G2a2, forming part of the highland West Asian cluster of G2a diversity.
G2a6a’s importance lies in its reflection of early pastoral and agro-pastoral dynamics across the southern Caucasus and northwest Iran. Its stable geographic pattern complements archaeological evidence of long-lived highland cultural networks stretching from the Zagros to the Kura basin.