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AAC Alta Cloud


Denomination: 'AAC Alta Cloud'
Previously Proposed Denomination: 'Alta Cloud'
Botanical Name: Solanum tuberosum
Applicant/Holder: Colorado State University Research Foundation
P.O. Box 483
Fort Collins, Colorado
United States of America
Breeder: David Holm, Colorado State University, Center, United States of America
Benoit Bizimungu, Agriculture & Agri-Food Canada, Fredericton, New Brunswick
Agent in Canada: Agriculture & Agri-Food Canada
Office of Intellectual Property and Commercialization
107 Science Place
Saskatoon, Saskatchewan
S7N 0X2
Tel: (306) 385-9316
Application Date: 2012-02-22(priority claimed)
Application Number: 12-7520
Protective direction granted: 2012-02-22
Grant of Rights Date: 2013-12-12
Certificate Number: 4679
Grant of Rights Termination Date: 2031-12-12

Variety Description

Varieties used for comparison: 'Russet Burbank' and 'Ranger Russet'

Summary: The intensity of anthocyanin colouration at the base of the light sprout is very strong for 'AAC Alta Cloud' while it is medium for 'Russet Burbank' and 'Ranger Russet'. The proportion of blue in the anthocyanin colouration at the base of the light sprout is high for 'AAC Alta Cloud' while it is absent for both reference varieties. 'AAC Alta Cloud' has shorter plants than the reference varieties. The leaves of 'AAC Alta Cloud' have a small to medium size outline whereas those of 'Russet Burbank' have a medium to large outline. The anthocyanin colouration of the flower bud is absent for 'AAC Alta Cloud' whereas it is medium for 'Russet Burbank' and high for 'Ranger Russet'. The inner side of the corolla of 'AAC Alta Cloud' has no anthocyanin colouration whereas that of 'Ranger Russet' has medium anthocyanin colouration. The peduncle of 'AAC Alta Cloud' has a lower extent of anthocyanin colouration than that of 'Ranger Russet'.


LIGHT SPROUT: medium size, conical, medium to many root tips, short lateral shoots
LIGHT SPROUT BASE: very strong intensity of anthocyanin colouration, high proportion of blue in anthocyanin colouration, medium to dense pubescence
LIGHT SPROUT TIP: small to medium size in relation to base, closed habit, no anthocyanin colouration, medium dense pubescence

PLANT: foliage structure is leaf type where foliage is closed and stems are not or hardly visible, semi-upright growth habit, late maturity

STEM: no anthocyanin colouration

LEAF: small to medium size outline, opened, presence of secondary leaflets is medium to strong, medium to dark green on upper side, anthocyanin colouration of midrib of upper side is absent
SECOND PAIR OF LATERAL LEAFLETS: small to medium size, width in relation to length is narrower than long
LEAFLETS: frequency of coalescence of terminal and lateral leaflets is absent, weak waviness of margin, shallow to medium deep veins on upper side, dull upper side

INFLORESCENCE: medium frequency per plant, medium to large, anthocyanin colouration on peduncle is absent
FLOWER BUD: extent of anthocyanin colouration is absent
COROLLA: medium size, no anthocyanin colouration on inner side

TUBER: long-oval, reddish brown skin, shallow eyes, base of eyes is white, white flesh

Origin & Breeding History: 'AAC Alta Cloud' (experimental designation CV98112-3) originated from a cross made at the San Luis Valley Research Farm of Colorado State University in the United States and was assigned to Agriculture and Agri-Food Canada's Lethbridge Research Centre as per a reciprocal exchange agreement of unselected F1 seedlings. The cross was conducted in 1998 between the female parent designated 'AC91014-2' and the male parent variety 'Canela Russet'. In 1999, true potato seed was sown in a greenhouse at Colorado State University and the resulting seedling tubers were planted in 2000 at the Vauxhall Research Substation of Agriculture and Agri-Food Canada for selection. A clone designated CV98112-3 was selected in 2000, and progressed through 4-hill, 10-hill, and 50-hill generation stages of selection and evaluation at Vauxhall in 2001, 2002 and 2003, respectively. Selection criteria in the field in Vauxhall and in the laboratory in Lethbridge included vine maturity, shape and size of tuber, specific gravity, culinary quality, fry colour at harvest and out of long-term storage at 5 and 10°C, incidence of tuber defects, and reaction to diseases including common scab, late blight, fusarium dry rot and verticillium wilt.

Tests & Trials: The trial for 'AAC Alta Cloud' was conducted in 2012 at the Potato Research Centre of Agriculture and Agri-Food Canada in Fredericton, New Brunswick. There were 2 replicates per variety. Each replicate was 7.5 metres long with 0.9 metre spacing between rows. The plants were spaced 0.25 metres apart within the row. In total, there were 60 plants per variety.

Comparison table for 'AAC Alta Cloud' with reference varieties 'Russet Burbank' and 'Ranger Russet'

Plant height (cm)

  'AAC Alta Cloud' 'Russet Burbank' 'Ranger Russet'
mean 44.9 57.1 56.5
std. deviation 3.8 1.8 3.2

Click on image for larger view
AAC Alta Cloud
Potato: 'AAC Alta Cloud' (left) with reference varieties 'Russet Burbank' (centre) and 'Ranger Russet' (right)

Click on image for larger view
AAC Alta Cloud
Potato: 'AAC Alta Cloud' (left) with reference varieties 'Russet Burbank' (centre) and 'Ranger Russet' (right)

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