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Denomination: 'CO00405-1RF'
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
Agent in Canada: Canadian Eastern Growers Inc.
399 ch 1er rang
DSL de Drummond, New Brunswick
E3Y 2S8
Tel: 506 479-2188
Application Date: 2018-07-19
Provisional Protection:: 2018-07-19
Application Number: 18-9582
Date Withdrawn: 2020-08-31

Variety Description

Variety used for comparison: 'Cecile'

Summary: The base of the lightsprout of 'CO00405-1RF' has a very strong intensity of anthocyanin colouration and sparse pubescence while that of 'Cecile' has a strong intensity of anthocyanin colouration and a medium density of pubescence. The lightsprout tip for 'CO00405-1RF' has a closed habit and medium density of pubescence whereas that of 'Cecile' has an intermediate habit, between closed and open, and dense pubescence. The plant foliage structure is intermediate to leaf type for 'CO00405-1RF' whereas it is stem type for 'Cecile'. 'CO00405-1RF' has a low to medium extent of anthocyanin colouration of medium intensity along the midrib of the upper side of the leaf while it is of a very high extent with very strong intensity for 'Cecile'. The second pair of lateral leaflets are narrower than long for 'CO00405-1RF' while they are as broad as long for 'Cecile'. The plants of 'CO00405-1RF' are shorter than those of 'Cecile'. The intensity of anthocyanin colouration on the inner side of the corolla is very high for 'CO00405-1RF' while it is high for 'Cecile'. The plants of 'CO00405-1RF' mature mid- season while the plants of 'Cecile' mature late in the season. The tuber of 'CO00405-1RF' is very long with white flesh while that of 'Cecile' is long with light yellow flesh.


LIGHTSPROUT: medium, ovoid, few root tips, short lateral shoots
LIGHTSPROUT BASE: very strong intensity of anthocyanin colouration, medium proportion of blue in anthocyanin colouration, sparse pubescence
LIGHTSPROUT TIP: small in relation to base, closed habit, strong intensity of anthocyanin colouration, medium density of pubescence

PLANT: intermediate to leaf type foliage structure where foliage is half open to closed with stems partly to hardly visible, semi-upright growth habit, matures mid-season

STEM: absent or very low extent of anthocyanin colouration

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

PEDUNCLE: low to medium extent of anthocyanin colouration
INFLORESCENCE: medium frequency per plant, medium size
FLOWER BUD: low extent of anthocyanin colouration
COROLLA: medium to large
COROLLA (INNER SIDE): very high extent of anthocyanin colouration, strong intensity of anthocyanin colouration, absent or low proportion of blue in anthocyanin colouration

TUBER: very long, white flesh
TUBER EYE: shallow to medium depth, red at base

Origin & Breeding History: 'CO00405-1RF' originated from a cross between 'Banana', as the female parent, and 'NDC6174-1R', as the male parent, conducted at the Colorado State University San Luis Valley Research Center, in Center, Colorado, USA in 2000. In 2001, the true potato seed resulting from the cross was sown in a greenhouse and the resulting seedling tubers field planted in Center, Colorado. In 2002, 'CO00405-1RF' was identified. Selection criteria was based on negative mass selection for agronomic characteristics and disease resistance.

Tests & Trials: The comparative trial for 'CO00405-1RF' was conducted by Global Agri Services Inc. during the 2018 growing season in Drummond, New Brunswick. The trial consisted of a single, 21 metre long row containing 70 plants spaced 0.3 metres apart for each variety. The distance between rows within the trial was 0.9 metres. Observations and measurements were taken from 10 plants, or 10 parts of plants, of each variety. The mean difference was significant at the 5% probability level based on a paired Student's t-test.

Comparison table for 'CO00405-1RF' with reference variety 'Cecile'

Plant height (cm)

  'CO00405-1RF' 'Cecile'
mean 47.7 56.9
std. deviation 3.9 2.0

Click on image for larger view
Potato: 'CO00405-1RF' (left) with reference variety 'Cecile' (right)

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