Penobscot: A new variety of potato with leafroll resistance and high solids

Abstract

Penobscot is a variety of potato bred primarily for leafroll resistance by the United States Department of Agriculture and tested cooperatively in Maine and other States as part of the National Potato-Breeding Program. The tubers of Penobscot are oblong to ovate in shape with light-cream, buff skin and medium-deep eyes. In the Maine tests, yields of Penobscot compared favorably with those of Kennebec, Katahdin, and Irish Cobbler. The specific gravity values of Penobscot were relatively high and usually exceeded those of three other commercial varieties grown in Maine. Penobscot was similar to Kennebec in chipping qualities determined both after harvest and after storage at 38 F followed by reconditioning, but its French fry color index and texture were slightly less favorable than Kennebec when fried after harvest. Penobscot possesses field immunity from mild mosaic and has considerably more resistance to leafroll in the field than the standard varieties now being grown. Its favorable processing qualities, high specific gravity, and its good yielding ability, along with its disease resistance, are all characteristics that should help to make Penobscot a valuable variety for both grower and processor.