Medieval grape seed reveals 600-year lineage of Pinot Noir

From a medieval hospital latrine to modern vineyards, a single grape seed is offering an extraordinary genetic link to 600 years of pinot noir cultivation.

A 600-year-old grape seed discovered in the toilet of a medieval hospital in France has been identified as genetically identical to modern pinot noir, offering rare insight into the longevity of one of the world’s most popular grape varieties.

The finding, first reported by CBS/AFP, suggests that the cultivation of pinot noir in France dates back at least to the 1400s, according to a new study published in Nature Communications.

A link between past and present

The seed was uncovered in a latrine at a 15th-century hospital in Valenciennes, northern France, where toilets were sometimes used as rubbish pits. Researchers sequenced its DNA and found a direct genetic match with present-day pinot noir.

“It is not possible to say whether the fruit was eaten like table grapes or whether people made wine from it at the time,” said study co-author Laurent Bouby of the Institute of Evolutionary Science of Montpellier, speaking to AFP.

However, the discovery establishes a clear connection between modern France’s wine industry and its medieval roots. Ludovic Orlando, a paleogeneticist at the University of Toulouse and co-author of the study, noted the historical context of the period.

“She could have eaten the same grapes as us,” Orlando told AFP, referring to Joan of Arc, whose life fell within the same century.

Evidence of early viticultural techniques

The study analysed the genomes of 54 grape seeds spanning from the Bronze Age (around 2,300 BC) to the Middle Ages. The results confirm that growers had already adopted clonal propagation techniques — preserving and replanting cuttings from specific vines — for at least 600 years.

While historical texts had hinted at such practices, Bouby said they have been difficult to verify without genetic evidence.

The research also suggests that these techniques may date back even further, with evidence of clonal propagation appearing as early as the Iron Age (625–500 BC).

Ancient trade and genetic diversity

The oldest seeds examined came from wild vines in the Nîmes region, dating to around 2,000 BC. Domesticated vines began appearing in southern France’s Var region between 625 and 500 BC, aligning with the arrival of Greek settlers who introduced viticulture after founding Marseille.

DNA analysis also revealed long-distance exchanges of grape varieties during the Roman period, with links to Spain, the Balkans, the Caucasus and the Middle East. The study found significant genetic mixing between domesticated vines and local wild varieties, particularly in northern France.

Enduring importance of French wine

Pinot noir is now the fourth most widely planted grape variety in the world, according to the study, and remains closely associated with Burgundy.

The authors highlight that France continues to rank among the world’s leading wine producers, with the sector contributing tens of billions of dollars annually and supporting hundreds of thousands of jobs.

However, they also note mounting challenges. In 2021, France recorded its smallest harvest since 1957, losing more than $2 billion in sales due to extreme weather — a major setback for the country’s second-largest export industry.

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