Overview
J1-Y3702 is a downstream lineage of the Arabian centered J1-P58 expansion with demographic roots in northwest Arabia, the Syro-Arabian desert margin and the wider Hejaz corridor. Its early formation corresponds to a period in the late Neolithic through early Chalcolithic transition when pastoral specialization became a dominant adaptation in the arid and semi-arid zones of northern Arabia. Groups associated with ancestral Y3702 populations likely engaged in regional herding mobility, seasonal camp networks and oasis-linked subsistence systems. During the Bronze Age and Iron Age, Y3702 populations became integrated into the tribal landscapes of northwestern Arabia and the southern Levant. Their movements intersected with long-distance caravan activity, including the incense and copper trade routes that linked Arabia with Mesopotamia and the Levant. The downstream branching structure of Y3702 suggests multiple tribal founder effects, with microclades anchored in specific regions of Arabia and Jordan.