The James Hutton Institute has unveiled a new set of cutting-edge genomics technologies that promise to revolutionise potato breeding by enabling unprecedented precision in identifying and tracking desirable genetic traits.

The scientific breakthrough addresses one of the most persistent challenges in potato genetics: the difficulty of reliably passing on beneficial traits to progeny, even when present in both parent plants. This is due to the complex nature of the potato genome. Cultivated potatoes are typically tetraploid, meaning they carry four copies of each chromosome, which can recombine in unpredictable ways during breeding. As a result, the inheritance of specific agronomic or disease-resistance traits is often inconsistent.

To overcome this challenge, Hutton researchers are leveraging molecular markers—short DNA sequences that act as genomic signposts—to pinpoint whether specific beneficial traits are present in a given plant. These markers enable breeders to track the genetic segments associated with valuable characteristics, such as resilience to disease or environmental stress.

Professor Ingo Hein, Head of Potato Genetics at the James Hutton Institute, stated:

“We have harnessed state-of-the-art genomics technologies that enable researchers to analyse each of the four genome copies individually. This allows us to precisely tag only the beneficial DNA segment—known as a haplotype.”

According to Professor Hein, the research team has developed a “minimum sequence representation” of the entire potato genome—each genome copy comprising roughly 840 million base pairs—allowing for precise detection of both large and small genetic regions associated with critical traits.

“Our work has demonstrated the effectiveness of this approach for both large genomic regions of over a million base pairs, and very small ones around 20,000 base pairs,” he added.

The implications for the potato industry are significant. By identifying and tagging functional resistance genes that provide protection against pathogens, breeders can accelerate the development of robust varieties that are better suited to the evolving pressures of climate change and disease outbreaks. This technology could drastically shorten breeding timelines and improve reliability in trait selection.

Moreover, while this research is focused on potatoes, the methodology is transferrable to other crops, provided sufficient genomic data is available. It highlights the essential role of fundamental genomics research in transforming scientific insight into practical tools that enhance food security and crop resilience.

The James Hutton Institute remains a global leader in applied agricultural science and continues to drive innovation through its integrated research programmes in plant breeding, genetics, and environmental sustainability.