Overview
J1-ZS910 is a downstream element of the J1-L147.1 expansion and reflects a demographic process centered on early pastoralist populations of the northern Arabian interior. These groups operated on desert-steppe resource systems structured around wells, wadis and caravan-related mobility networks. The lineage originated during the late Neolithic to early Bronze Age transition, during which environmental pressures encouraged seasonal movement and tribal consolidation. By the Bronze and Iron Ages, ZS910-bearing communities played active roles in the development of early North Arabian tribal formations. Their downstream organization shows multiple founder effects tied to Hejazi, Najdi and southern Levantine lineages, some of which appear in early Islamic contexts in Arabia, Iraq and the Gulf. The lineage's phylogenetic distribution aligns closely with historically documented desert populations.