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ORIGIN: Released jointly by the Minnesota Agricultural Experiment Station and the Texas Agricultural Experiment Station in 1985. Krantz was selected simultaneously in seedling populations by both the Texas and Minnesota breeding programs from a cross between MN366.65-3 and C6743-5. It was tested as MNTX5-8-1RU and MN9648.

CHARACTERISTICS: Krantz combines yield and specific gravity equal or exceeding that of Norgold Russet with exceptional boiling and baking qualities. Krantz processes well for fresh or frozen french fries. Total glycoalkaloid content is low (2.5 mg/100g fresh weight).

Plants are medium-late maturity, tall, vigorous and upright. Stems are medium thick with a reddish tinge at the nodes. Wings are straight, single, but not prominent. Leaves are flat, medium sized, smooth and glossy, having decurrent (extending downward), irregular terminal leaflets and 3-5 pairs of asymmetrical, flat primary leaflets. Secondary leaflets are small, between primary leaflets. The inflorescence is on a long peduncle, with reddish buds, large white corollas and green anthers. Tubers are oblong to slightly blocky, russet-skinned, with shallow eyes, white flesh and short dormancy. Tuber bulking occurs early.

STRENGTHS & WEAKNESSES: Krantz is well-adapted to growing areas with irrigated, sandy solid, but susceptibility to growth cracking has been found in heavier soils and in areas with non-irrigated sandy soils. Tuber netting is very light in some soils or under certain growing conditions. Krantz has high resistance to common scab and hollow heart, with very high field resistance to late blight, and moderate resistance to Verticillium. It is susceptible to early blight and potato viruses S and Y. Emergence and early plant growth can be slow and irregular.