Dushan Dawn: Early Neolithic Guangxi

Along the limestone hills and river valleys of present-day Guangxi, the Dushan recovery represents an early chapter of Neolithic expansion in southern China. Radiocarbon dates associated with the genetic sample place human activity firmly between 7025 and 6644 BCE, a time when small, localized communities were experimenting with a mixed subsistence of wild resources and emerging cultivation. Archaeological data indicates pottery, ground stone tools, and features consistent with seasonal settlement, but preservation varies across loci.

Limited evidence suggests these groups occupied a landscape of karst caves, shallow riverine terraces and wetlands where early rice husbandry may have been practiced alongside foraging for riverine fish, mollusks and wild tubers. The material culture at Dushan fits within a broader Neolithic mosaic of southern China in which local traditions interacted with innovations spreading from the Yangtze basin and coastal regions.

While the single genetic sample cannot resolve migration routes, the Dushan context provides a snapshot of a community at the edge of agricultural dispersal and local adaptation. Archaeological interpretation remains provisional: more systematic excavation and additional directly dated samples will be required to clarify demographic and cultural trajectories.

The genetic dataset from China_Guangxi_Dushan_N comprises a single individual, dated between 7025 and 6644 BCE, carrying mitochondrial haplogroup B. Haplogroup B is widespread across East Asia and Southeast Asia in both ancient and modern populations; it is frequently detected in coastal and inland groups and has been associated in broader studies with maternal lineages that participated in Holocene expansions.

Because only mtDNA is reported for this sample (with no common Y-DNA assigned), inferences are strictly maternal and limited in scope. Mitochondrial sequences can illuminate aspects of maternal continuity and population connectivity but cannot by themselves reveal sex-biased migration, genome-wide ancestry components, or fine-scale demographic events. Archaeogenomic comparisons elsewhere in southern China and Southeast Asia have shown a complex tapestry: local hunter-gatherer ancestry, incoming agricultural-associated lineages from the Yangtze and mainland Southeast Asia, and later movements. Whether the Dushan individual represents local continuity, a migrating group, or admixture among small local populations cannot be resolved from one mtDNA sample.

Given the sample count of one (well below 10), conclusions about population structure must be treated as preliminary. Additional whole-genome data, more mitochondrial genomes and contextual archaeological sampling are needed to connect this individual to broader Neolithic demographic processes.