AAC Alta Crisp

Potato

Denomination: 'AAC Alta Crisp'
Previously Proposed Denomination: 'AAC CV02321-1'
Botanical Name: Solanum tuberosum
Applicant/Holder: Colorado State University Research Foundation
P.O. Box 483
Fort Collins, Colorado
80522
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
6000 C&E Trail
Lacombe, Alberta
T4L 1W1
Canada
Tel: (403) 782-8126
Application Date: 2016-04-28
Application Number: 16-8908

Variety Description

Varieties used for comparison: 'Andover' and 'Snowden'

Summary: The shape of the lightsprout of 'AAC Alta Crisp' is ovoid whereas it is spherical for the reference varieties. The base of the lightsprout of 'AAC Alta Crisp' has a very strong intensity of anthocyanin colouration whereas it is weak to medium on 'Andover' and it is absent to very weak on 'Snowden. The proportion of blue anthocyanin colouration at the base of the lightsprout is high on 'AAC Alta Crisp' whereas it is absent for the reference varieties. The tip of the lightsprout of 'AAC Alta Crisp' has a very strong intensity of anthocyanin colouration whereas it is absent to very weak on the reference varieties. The extent of anthocyanin colouration along the entire stem is medium for 'AAC Alta Crisp' whereas the extent is absent for both reference varieties. The silhouette of the leaf of 'AAC Alta Crisp' is closed whereas it is open for the reference varieties. At the apical rosette, the leaflet blade of 'AAC Alta Crisp' is pubescent whereas the leaflet blade for 'Andover' is glabrous. The extent of anthocyanin colouration of the flower bud and the peduncle are low for 'AAC Alta Crisp' whereas they are absent for the reference varieties. The plant of 'AAC Alta Crisp' is shorter than that of 'Snowden'. The tuber of 'AAC Alta Crisp' is round whereas the tuber of 'Snowden' has a short oval shape.

Description:

LIGHTSPROUT: medium size, ovoid shape, medium number to many root tips, short lateral shoots
LIGHTSPROUT BASE: very strong intensity of anthocyanin colouration, high proportion of blue in anthocyanin colouration, sparse pubescence
LIGHTSPROUT TIP: medium size in relation to base, intermediate habit, very strong intensity of anthocyanin colouration, medium density pubescence

PLANT: foliage structure is leaf type where foliage is closed and stems are not or hardly visible, semi-upright growth habit, matures mid-season
STEM: medium extent of anthocyanin colouration along entire stem

LEAF: outline is medium to large, openness is closed, medium to strong presence of secondary leaflets, medium to dark green on upper side, low extent and weak intensity of anthocyanin colouration on midrib of upper side, absent or very low frequency of coalescence of terminal and lateral leaflets
SECOND PAIR OF LATERAL LEAFLETS: medium size, leaflet is narrower than long
LEAFLET: medium waviness of margin, medium to deep veins, dull glossiness of upper side, pubescence on blade at apical rosette

INFLORESCENCE: low frequency per plant, small
PEDUNCLE: low extent of anthocyanin colouration
FLOWER BUD: low extent of anthocyanin colouration
COROLLA: medium sized, very low to low extent and weak intensity of anthocyanin colouration on inner side, absent proportion of blue in anthocyanin colouration on inner side

TUBER: round shape, white flesh
TUBER EYE: shallow depth, white at base
TUBER SKIN: light beige

Origin & Breeding History: 'AAC Alta Crisp' (experimental designations 'AR2011-05' and 'AAC CV02321-1') originated from a cross made at the San Luis Valley Research Farm, Colorado State University, USA in 2002 between the breeding clones 'NY115W', as the female parent, and 'BC0894-2W', as the male parent. In 2003, true potato seed was sown in a greenhouse at Colorado State University and the resulting seedling tubers were planted in 1-hill plots in 2004 at the Vauxhall Research Substation of Agriculture and Agri-Food Canada in Vauxhall, Alberta. A clone designated 'CV02321-1' was selected in 2004, and progressed through 4-hill, 12-hill, and 50-hill generation stages of selection and evaluation at Vauxhall in 2005, 2006 and 2007, respectively. Selection criteria used in the field at Vauxhall and in the laboratory at the Lethbridge Research Centre included vine maturity, visual appearance, uniformity and shape of tubers, tuber size and set, skin colour, incidence of tuber defects, reaction to common scab, solids content and chip colour from processing out of the field and out of cold storage. 'CV02321-1' was further evaluated in the Western Canadian Regional Potato Trials from 2008 to 2009, and in the National Potato Variety Trials in 2010. Additional evaluations were conducted by industry from 2011 to 2013.

Tests & Trials: The comparative trial for 'AAC Alta Crisp' was conducted during the 2016 growing season at Agriculture and Agri-Food Canada's Fredericton Research and Development Centre in Fredericton, New Brunswick. The trial consisted of 2 replicates with 30 plants per variety in each replicate, grown in two 7.5 metre length rows spaced 90 centimetres apart. Plants were spaced 25 centimetres apart in the row. Observations and measurements were taken from 10 plants, or 10 parts of plants, of each variety. Mean differences were significant at the 5% probability level based on LSD values.


Comparison table for 'AAC Alta Crisp' with reference varieties 'Andover' and 'Snowden'

Plant height (cm)

  'AAC Alta Crisp' 'Andover' 'Snowden'
mean (LSD=3.7) 30 45 28
std. deviation 2 4 5

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AAC Alta Crisp
Potato: 'AAC Alta Crisp' (left) with reference varieties 'Andover' (centre) and 'Snowden' (right)

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AAC Alta Crisp
Potato: 'AAC Alta Crisp' (left) with reference varieties 'Andover' (centre) and 'Snowden' (right)

Click on image for larger view
AAC Alta Crisp
Potato: 'AAC Alta Crisp' (left) with reference variety 'Andover' (right)

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