Overview
J1-Y5027 is a downstream lineage of the major Arabian-rooted J1-P58 clade and appears to have formed during the early Bronze Age among pastoralist groups living across the northern Arabian plateau, Wadi Sirhan basin and southern Jordan. These communities relied on flexible pastoral mobility systems structured around wells, wadis and transitional grazing corridors that allowed for sustained movement between the Hejaz and the Levantine fringe. Archaeological parallels include early desert encampments, oasis-linked settlements and proto-caravan nodes that supported interregional trade. During the Bronze and Iron Age periods, Y5027-bearing populations played an active role in the demographic growth of North Arabian tribal confederations. Its downstream phylogeny shows clear founder effects connected to clan-level expansions in the Hejaz and northern Arabia, with later dispersal into Mesopotamia, the Gulf and portions of the southern Levant during late antiquity and early Islamic expansions.