Clearwater Russet (AOA95154-1)

Parentage – Bannock Russet x A89152-4^1,2

Breeder – Bred by J.J. Pavek in 1995 and then developed by Pacific Northwest Potato Variety Development Program (USDA-ARS and Agricultural Experiment Stations of Idaho, Oregon, and Washington)^1,3

Maturity – Medium to late^1,2,3,4,5

Usage – Fresh market and processing^1,2,5

Plant – Medium sized, upright plant with vines visible through canopy^1,3; moderately thick stems with little to no red-purple coloration^1,4

Leaves – Medium sized, green, ovate with red-purple pigmentation on petioles and midribs; three to five primary leaflets pairs along with one to five pairs of secondary and tertiary leaflets¹

Flowers – Medium-sized, purple-red flowers with white tips; yellow-orange anthers; moderate berry production¹

Tubers – Oblong to long, medium sized, brown russeted skin^1,2,3,4; shallow evenly-distributed eyes with slight eyebrows; white creamy flesh^1,2,3; high specific gravity²

Strengths – Resistant to potato virus x, tuber late blight, sugar ends and most internal/external defects; moderately resistant to Verticillium wilt, common scab, potato virus Y; high protein content^1,2; less growth cracks and secondary growth than Ranger Russet or Russet Burbank; high yielding²

Weaknesses – Highly susceptible to Fusarium dry rot; susceptible to bacterial ring rot, internal brown spot, early blight, potato leaf roll virus and hollow heart^1,2

References: ¹Novy, R. G. et al. 2010. Clearwater Russet: A Dual-Purpose Potato Cultivar with Cold Sweetening Resistance, High Protein Content, and Low Incidence of External Defects and Sugar Ends. American Journal of Potato Research 87: 458-471. ²Northwest Potato Variety Development Program. ³The Idaho Potato Commission 2022. ³Canadian Food Inspection Agency 2022. ⁴Colorado Certified Potato Growers Association 2022. ⁵ 2022 Great American Media Services & Spudman.

Last Revised: 8/24/22

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