Discovery of an Independent Neolithic Origin of Bread Wheat in Southern Caucasus, Georgia
The Mystery of Ancient Wheat
Eight thousand years ago, the origin of cultivated bread wheat (Triticum aestivum) has long been uncertain. Previous studies have proposed the South Caucasus or southwestern Asia as candidate regions, but pinpointing a precise center has been challenging. In particular, ancient DNA and archaeological evidence have not converged, leaving a persistent puzzle.
Innovations in Genomic and Soil Analyses
The research team simultaneously applied cutting‑edge whole‑genome sequencing and radiocarbon dating to wheat seeds and associated soil samples recovered from an ancient site in Georgia. The analyses revealed that the core genomic sequences of bread wheat possess distinct, independent variants that differ from extant West Asian lineages, and the radiocarbon dates place the specimens in the Neolithic, approximately 7,500 years ago. These findings provide compelling evidence that Georgia represents an independent origin of bread wheat.
Implications and Future Prospects
This discovery re‑examines the cradle of agriculture and enhances our understanding of the diversity of ancient food systems. Moreover, it supplies novel genetic resources that can be harnessed for modern wheat breeding, potentially enriching the quality and variety of breads and pastas on our tables.
Proceedings of the National Academy of Sciences, Volume 123, Issue 19, May 2026. SignificancePrevious genetic studies indicate that bread wheat (Triticum aestivum L) originated approximately 8,000 y ago, with the distribution of its wild progenitor, goatgrass (Aegilops tauschii Coss.) suggesting that the South Caucasus or southwestern ...
By clarifying the previously ambiguous history of when and where bread wheat was first cultivated independently, this study enables precise identification of source genetic material essential for food security and climate‑change adaptation. Consequently, it facilitates the introduction of more diverse and resilient wheat varieties into our food supply, which could stabilize bread prices and provide nutritionally superior products in the future.