Keystone Russet is a very high yielding, medium russet-skinned, fresh market cultivar. Release is scheduled for 1999, by
the Colorado and Idaho Agricultural Experiment Stations and the USDA. Keystone was tested as AC83064-1 and is the
result of a cross between CalWhite (A76147-2) x A7875-5. It has low specific gravity and attractive tuber type. Plant
variety protection is being pursued. Emergence is uniform, with a medium-sized, somewhat spreading vine and white flowers. It has a
determinate growth habit and a moderate to shallow root system. Tuber initiation and bulking rate are medium.
Tubers have white flesh, are oblong to long, with medium russet skin. Eyes are shallow and most prevalent on
the bud end. Specific gravity is low (1.078).
