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American Focus > Blog > Tech and Science > Mystery of the potato’s origins solved by genetics
Tech and Science

Mystery of the potato’s origins solved by genetics

Last updated: August 3, 2025 8:50 pm
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Mystery of the potato’s origins solved by genetics
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Potato tubers are the result of an ancient hybridisation event

Jackie Bale/Getty Images

The Origins of the Humble Potato Revealed Through Genetic Study

The humble potato, a staple food in many cultures, has a fascinating origin story that dates back millions of years. Recent genetic research has uncovered that the potato we know today is the result of a genetic hybridization event between an ancient tomato plant and a lesser-known South American lineage called Etuberosum.

Etuberosum plants share many similarities with potato plants, except for one significant difference – they do not produce the starchy tubers that have become a defining feature of cultivated potatoes.

Research conducted by Sandra Knapp and her team at the Natural History Museum in London focused on the genetics of three groups of plants within the Solanum genus: Petota (including cultivated potatoes), the tomato group, and Etuberosum. Through the analysis of 450 genomes from cultivated and wild potato species, the researchers found a consistent presence of genes from both tomato and Etuberosum in all potato lineages.

This genetic evidence points to a hybridization event that took place approximately 8 million years ago in what is now Chile, leading to the emergence of the potato lineage. This event allowed for the development of new gene combinations, including the formation of tubers, which enabled these plants to thrive in cold, dry environments like the Andes.

According to Knapp, this hybridization event showcases the power of genetic diversity and innovation through hybridization. The study underscores the importance of protecting wild crop relatives, such as Etuberosum, to better understand the evolution and adaptation of essential food crops like potatoes in the face of environmental challenges.

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Brett Summerell from the Botanic Gardens of Sydney commended the study for providing comprehensive evidence of hybridization and species radiation within the Solanum genus. He emphasized the urgent need to conserve wild crop relatives to safeguard the genetic diversity essential for future crop resilience.

As we delve deeper into the genetic history of food crops like potatoes, we gain valuable insights into their evolution and potential adaptations in a changing world. The story of the potato’s origins serves as a reminder of the intricate relationships between plant species and the importance of preserving biodiversity for future generations.

TAGGED:GeneticsMysteryOriginspotatosSolved
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