A groundbreaking genomic study published in Nature has unveiled remarkable insights into the complex ancestral tapestry of dogs across western Eurasia, dating back to the Paleolithic era. By leveraging advanced DNA sequencing technologies and newly discovered ancient genomes, researchers have traced the intricate gene flow patterns between early dogs and regional wolf populations, particularly those from the Near East. This work challenges traditional views on domestication and highlights the deep and variable genetic interactions shaping the earliest foundations of canid companionship.
The research team focused extensively on genetic signals indicative of admixture events involving ancient western Eurasian dogs and local wolf populations. Central to this effort was the sequencing of a 2,700-year-old wolf genome from Wezmeh Cave in Iran, serving as a critical reference point for Near Eastern wolf ancestry. This approach importantly circumvents complications from recent dog–wolf hybridization events observed in modern Near Eastern canid populations, isolating genetic contributions from ancient times.
Utilizing a suite of population genetics tools, including D-statistics, F4-ratio tests, and supervised ADMIXTURE analysis, the scientists demonstrated that ancient Near Eastern dogs, including a remarkable Paleolithic specimen from Pınarbaşı, exhibit significant genetic affinity with the Wezmeh wolf lineage. This finding implies that gene flow from local wolf populations into domestic dogs was occurring as early as 15,800 years ago, underscoring a much earlier and more complex process of admixture than previously understood.
Contrasting patterns emerged when analyzing Mesolithic dogs from different regions of Europe. Dogs from Karelia (north-west Russia) and Serbia’s Padina site showed no significant excess allele sharing with Near Eastern wolves, while the Mesolithic dog from Vlasac (Serbia) did display such genetic signals. This variability reveals that Near Eastern wolf ancestry was not uniformly present in post-Paleolithic European dogs, but rather fluctuated across time and geography, reflecting localized interactions and potentially varying domestication dynamics.
The study further elucidates the persistence and modulation of Near Eastern wolf ancestry into the Neolithic and subsequent periods. Near Eastern dogs from the Neolithic onwards harbor significantly more wolf-derived genetic material compared to their contemporaneous European counterparts. Negative D-statistics when comparing diverse ancient Near Eastern dogs to the Pınarbaşı specimen highlight a temporal increase in Near Eastern wolf lineage introgression during these periods.
Quantitative analyses emphasized this influx, identifying the highest levels of Near Eastern wolf ancestry in a 7,000-year-old dog from Tel Hreiz in Israel, estimated at approximately 19% via F4-ratios. However, this elevated wolf ancestry diminished over millennia, as evidenced by dogs from Ashkelon (Israel) dating to around 2,300 years ago, which retained only 3–5% of wolf lineage contribution, indicating a dynamic interplay of admixture and dilution processes through time.
The genetic footprint of Near Eastern wolves also persists distinctly in certain modern dog breeds, notably the Basenji of sub-Saharan Africa. Basenjis exhibit sustained high levels of Near Eastern wolf ancestry, ranging from approximately 14% to 17%. This persistence is likely due to the relative isolation of Basenjis until the colonial era, coupled with potential hybridization events with indigenous African canids, complicating the ancestry landscape and highlighting the importance of regional ecological contexts in shaping modern dog genomes.
Advanced admixture graph modeling tools, including TreeMix and AdmixtureBayes, were employed to reconstruct the historical gene flow networks and directionality of these admixture events. These models consistently support a scenario where ancient Near Eastern and African dogs are products of mixed ancestry, predominantly descending from western Eurasian Paleolithic dog lineages (around 96%) blended with a smaller yet significant proportion of Near Eastern wolf genes (approximately 4%). This refined model accounts for complex demographic events influencing dog domestication across vast spatiotemporal scales.
Intriguingly, the Paleolithic western Eurasian dog from Gough’s Cave presented a complex genetic profile, reflecting admixture between western Eurasian dog and Near Eastern wolf ancestries. However, the basal source of its ancestral lineages remains unresolved, pointing towards additional unsampled or extinct populations that may have contributed to dog evolution in Eurasia. This reflects ongoing challenges in fully reconstructing the earliest domestication episodes, despite unprecedented ancient DNA recoveries.
These findings collectively suggest a multifaceted model for dog domestication, rejecting simplistic narratives of a single domestication center or discrete event. Instead, they indicate that gene flow between local wolf populations and early dogs was geographically and temporally heterogeneous, particularly pronounced in the Near East during the Neolithic and later periods. Such territorial admixture likely enriched the gene pool of domestic dogs, enhancing adaptive potential and contributing to the wide geographic dispersal observed in subsequent millennia.
While the possibility of independent domestication events generating this wolf-like ancestry cannot be entirely excluded, the evidence favors repeated introgressive hybridization as the primary mechanism. This implies continual interaction and interbreeding between domestic dog lineages and wild wolf populations at various points, reflecting a dynamic evolutionary relationship rather than isolated domestication episodes.
This study significantly advances our understanding of the deep history of dog domestication, illuminating how ancient canid populations across western Eurasia and Africa were interconnected through complex networks of gene transfer. It opens new avenues for exploring how human cultural expansions, environmental changes, and wolf population dynamics jointly influenced the shape of the modern dog genome, one of humanity’s most enduring and beloved companions.
As genomic technologies continue to improve and more ancient canid remains are sequenced, future research will be better poised to disentangle these intricate genetic relationships. Such insights not only enrich our comprehension of domestication as a biological and cultural phenomenon but also shed light on the evolutionary processes that have enabled dogs to thrive alongside humans for tens of thousands of years.
Subject of Research: Ancient dog domestication and genetic admixture with regional wolf populations in western Eurasia
Article Title: Dogs were widely distributed across western Eurasia during the Palaeolithic
Article References:
Marsh, W.A., Scarsbrook, L., Yüncü, E. et al. Dogs were widely distributed across western Eurasia during the Palaeolithic. Nature 651, 995–1003 (2026). https://doi.org/10.1038/s41586-026-10170-x
Image Credits: AI Generated
DOI: 10.1038/s41586-026-10170-x
Keywords: Paleolithic dogs, Near Eastern wolf ancestry, dog domestication, ancient DNA, admixture, western Eurasia, Mesolithic dogs, Neolithic dogs, genetic introgression, Basenji, ancient genomes
