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Crop55

Potato

Denomination: 'Crop55'
Botanical Name: Solanum tuberosum
Applicant/Holder: The New Zealand Institute for Plant and Food Research Ltd.
120 Mt. Albert Road
Mt. Albert
Auckland
1025
New Zealand
Breeder: John Anderson, The New Zealand Institute for Plant & Food Research Limited, Pukekohe, New Zealand
Agent in Canada: Smart & Biggar LLP
P.O. Box 2999, Station D
55 Metcalfe Street, Suite 900
Ottawa, Ontario
K1P 5Y6
Canada
Tel: 613-232-2486 ex. 1279
Application Date: 2018-04-30
Application Number: 18-9440

Variety Description

Variety used for comparison: 'Roko'

Summary: The anthocyanin colouration at the base of the lightsprout for 'Crop55' has an absent or low proportion of blue while that of 'Roko' has a medium proportion of blue. In relation to the base, the lightsprout tip is medium in size with many root tips for 'Crop55' while it is large with few root tips for 'Roko'. The lightsprout tip for 'Crop55' has a strong intensity of anthocyanin colouration with sparse pubescence while that of 'Roko' has an absent or very weak to weak intensity of anthocyanin colouration with a medium density of pubescence. The extent of anthocyanin colouration of the stem is absent or very low for 'Crop55' while it is medium for 'Roko'. The leaf for 'Crop55' has intermediate openness while that for 'Roko' is open. The midrib on the upper side of the leaf for 'Crop55' has a low extent of anthocyanin colouration while the extent is high for 'Roko'. The upper side of the leaflet for 'Crop55' is medium to glossy while it is dull for 'Roko'. The anthocyanin colouration on the inner side of the corolla for 'Crop55' is of an absent or very low extent with absent or very weak intensity while that of 'Roko' is of a high extent with weak intensity. The colour at the base of the eye on the tuber for 'Crop 55' is red while it is yellow for 'Roko'.

Description:

LIGHTSPROUT: small, spherical shape, many root tips, short lateral shoots
LIGHTSPROUT BASE: strong to very strong intensity of anthocyanin colouration, absent or low proportion of blue in anthocyanin colouration, absent or very sparse to sparse pubescence
LIGHTSPROUT TIP: medium size in relation to base, intermediate between closed and open habit, strong intensity of anthocyanin colouration, sparse pubescence

PLANT: foliage structure is intermediate type where foliage is half-open and stems are partly visible, semi-upright growth habit, mid-season to late maturity

STEM: absent or very low extent of anthocyanin colouration

LEAF: medium size outline, intermediate openness, medium presence of secondary leaflets, medium green upper side, low extent and weak to 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: medium to strong waviness of margin, medium to deep veins, medium to glossy upper side, pubescence on blade at apical rosette

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

TUBER: oval, light yellow flesh
TUBER EYE: medium depth, red at base
TUBER SKIN: red

Origin & Breeding History: 'Crop55' (experimental designation 1419/2) originated from the cross between 'Laura', as the female parent, and 'Crop33', as the male parent, conducted at The New Zealand Institute for Plant and Food Research Limited, in Pukekohe, New Zealand, in 2005. The resulting seed was sown in 2006 and selected tubers field planted in 2007. Selections were made through 8 vegetatively propagated generations resulting in the identification of 1419/2 in 2015. Selection criteria were based on yield, tuber shape, size, skin colour and finish.

Tests & Trials: The comparative trial for 'Crop55' 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.

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Crop55
Potato: 'Crop 55' (left) with reference variety 'Roko' (right)

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