Complete genome sequencing suggests that blood remains correspond to a short male with brown eyes, while as Louis XVI had blue eyes and was tall, researchers found.
The study involving Spanish National Research Council (CSIC) shows the complete genome of the DNA recovered from a relic that was attributed so far to the French King.
"When the Y chromosome of three living Bourbons was decoded and we saw that it did not match with the DNA recovered from the pumpkin in 2010, we decided to sequence the complete genome and to make a functional interpretation in order to see if the blood could actually belong to Louis XVI," CSIC researcher Carles Lalueza-Fox, from the Institute of Evolutionary Biology, said.
According to the historical records that go back to his 16 great-great grandparents, Louis XVI had a very heterogeneous genealogical line in which central European ancestors predominated, mainly from the area that today is Germany and Poland, while the genome recovered from the pumpkin belongs to an individual with a clear French and Italian component.
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According to the chronicles of the time, there were many citizens who went to the scaffold in which Louis XVI was executed to dip their handkerchiefs in the blood of the monarch and thus save a historic memory, researchers said.
In 2010, a study coordinated by Lalueza-Fox analysed the blood from one of these handkerchiefs, which had stained the inside of the pumpkin, decorated with portraits of the protagonists of the French Revolution, in which it had been kept.
The finding was published in the Scientific Reports journal.