http://www.sciencemag.org/news/2019/02/spud-s-you-breeding-revolution-could-unleash-potential-potato

Diverse potatoes, such as these from Peru, will help breeders create resilient new varieties.

THE SACRED VALLEY OF THE INCAS IN PERU—On a bleak, brown hill here, David Ellis examines a test plot of potato plants and shakes his head. "They're dead, dead, dead," he says. Pests and lack of rain have laid waste to all 17 varieties that researchers had planted.