AC Ptarmigan

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Leaf Flowers Plant
Sprout Tuber Sliced tuber


  • Origin & Breeding: bred from the cross (F59103 x ND5281-8) made in 1972 at the Agriculture Canada Research Station in Fredericton, New Brunswick and selected by the Prairie Potato Breeding Project, Agriculture Canada, Lethbridge, Alberta.
  • Year registered in Canada: 1992
  • Registration number: 3654
  • Maturity: early

Botanical Features

  • Plants: medium size, semi-erect; stems pigmented; wings prominent, waved to straight single; nodes very weakly pigmented and slightly swollen.
  • Leaves: dark green; open; midribs and petioles pubescent, not pigmented.
    Terminal leaflets: medium ovate; tip acuminate; base truncate and asymmetrical; slightly wavy margins.
    Primary leaflets: three to four pairs; medium ovate; tip acuminate; base truncate and asymmetrical.
  • Flowers: white corolla, medium size; orange anthers; buds strongly pigmented, drop easily; peduncle medium green.
  • Tubers: oval; smooth buff skin; shallow eyes, eyebrows not prominent; cream coloured flesh.
  • Sprouts: conical; purple; base strongly pigmented and moderately pubescent; apex open, strongly pigmented and strongly pubescent.

Agricultural Features

High yielding variety of attractive appearance; very uniform tuber size and shape; early tuber set; medium number of tubers per plant; medium specific gravity.

  • Utilization: mealy texture; low boiling sloughing; good for baking; very good for boiling; excellent for early season chipping.
  • Chief Markets: early fresh market and early processing into chips.

Reaction to Diseases

Moderately resistant: early blight, common scab, PVY.
Susceptible: late blight, PVS.

References: 1, 6.

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