Gennaro Fazio, Terence Robinson This success story features the Cornell University and USDA apple rootstock breeding program in Geneva, New York. It highlights how disease resistance traits from the wild apple hybrid ‘Robusta 5’ have contributed to more than a dozen releases of resilient apple rootstocks. Millions of apple trees planted in the U.S. and throughout the world owe their special resiliency characteristics to ‘Robusta 5’.