The United Kingdom has granted regulatory approval for its first precision-bred potato variety, bringing the disease-resistant Maris Piper-derived cultivar PiperPlus closer to commercial production. Developed by Professor Jonathan Jones and his team at The Sainsbury Laboratory (TSL), PiperPlus possesses innate resistance to late blight (Phytophthora infestans), Potato Virus Y (PVY), and Potato Leafroll Virus (PLRV)—three of the most devastating threats to potato cultivation. The approval follows decades of research into plant immune genes and was confirmed by the UK’s Department for Environment, Food and Rural Affairs (DEFRA) after scientific evaluation by the Advisory Committee on Releases to the Environment. Under the Genetic Technology (Precision Breeding) Act 2023, the variety qualifies as precision-bred because its genetic modifications could have occurred naturally or through conventional breeding. Rather than relying solely on chemical crop protection, researchers strengthened the natural immune system of the Maris Piper by incorporating resistance genes from its wild relatives, which encode immune receptors that detect pathogens and activate the plant’s innate defenses.
Agricultural and Environmental Benefits:
Late blight remains one of the most serious challenges for British potato farmers, who typically apply preventative fungicides up to 15 times per season—a costly and environmentally intensive practice. PiperPlus is designed to significantly reduce this dependency, potentially lowering production costs, tractor usage, carbon emissions, and soil compaction while protecting beneficial soil fungi and microbial communities. Virus resistance offers additional advantages for seed potato production, as viral loads accumulate over generations and infected seed tubers reduce crop quality. Most UK seed potatoes are currently grown in Scotland, where cooler conditions limit virus spread; virus-resistant varieties could enable more seed production in England, reducing transport costs and associated emissions. Before PiperPlus reaches the market, it must secure approval from the Food Standards Agency, which will verify its safety for consumption. Professor Jones noted that bringing a new potato variety to market typically takes at least five years due to variety registration, National Listing requirements, and seed multiplication. While the Precision Breeding Act currently applies only to cultivation in England, produce grown under this legislation may be available to consumers throughout the UK.
