Crop 33

Potato

Variety Description

Variety used for comparison: 'Adirondack Blue'

Summary: The shape of the lightsprout of 'Crop 33' is ovoid whereas the shape of the lightsprout of 'Adirondack Blue' is broad cylindrical. The pubescence of the base of the lightsprout of 'Crop 33' is absent or very sparse to sparse whereas the pubescence is medium to dense for 'Adirondack Blue'. The foliage structure of the plants of 'Crop 33' is intermediate type, where the foliage is half open and the stems are partly visible, whereas the foliage structure of 'Adirondack Blue' is stem type, where the foliage is open and the stems are clearly visible. The openness of the leaf of 'Crop 33' is intermediate between closed and open whereas the leaf of 'Adirondack Blue' is open. The intensity of anthocyanin colouration on the upper side of the leaf midrib of 'Crop 33' is medium to strong whereas the intensity is very strong for 'Adirondack Blue'. The frequency of inflorescences per plant is low for 'Crop 33' whereas the frequency is medium for 'Adirondack Blue'. The size of the corolla of 'Crop 33' is small to medium whereas the corolla of 'Adirondack Blue' is large. The shape of the tuber of 'Crop 33' is oval whereas the shape of the tuber of 'Adirondack Blue' is long oval.

Description:

LIGHTSPROUT: medium size, ovoid shape, few root tips, short lateral shoots
LIGHTSPROUT BASE: very strong intensity of anthocyanin colouration, high proportion of blue in anthocyanin colouration, absent or very sparse to sparse pubescence
LIGHTSPROUT TIP: small in relation to base, closed habit, strong intensity of anthocyanin colouration, medium to dense 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: medium to high extent of anthocyanin colouration along entire length

LEAF: outline is medium size, openness is intermediate between closed and open, medium to dark green on upper side, high extent and medium to strong intensity of anthocyanin colouration on upper side of midrib, weak to medium presence of secondary leaflets, 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: weak waviness of margin, medium depth of veins, medium glossiness of upper side, pubescent blade at apical rosette

INFLORESCENCE: low frequency per plant, small to medium size
PEDUNCLE: low extent of anthocyanin colouration
FLOWER BUD: medium to high extent of anthocyanin colouration
COROLLA: small to 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 shape, blue flesh
TUBER EYE: shallow to medium depth, blue at base
TUBER SKIN: blue

Origin & Breeding History: 'Crop 33' (breeder's designation '2765-5') originated from a planned breeding program of the New Zealand Institute for Plant and Food Research Limited in Christchurch, New Zealand. The cross was conducted in a greenhouse in 1990 between the breeding lines designated '1463-1', as the female parent, and 'Stage II blue', as the male parent. The seed from the cross was planted in February 1991 at the Crop and Food Research Lincoln and the resulting tubers were planted in the field in November 1991. The tubers went through 10 cycles of selection before 'Crop 33' was selected in 2002 for the colour of its tuber skin and tuber flesh.

Tests & Trials: The comparative trial for 'Crop 33' was conducted during the growing season of 2015 in Drummond, New Brunswick. The trial consisted of a single, 18.5 metre long row containing 60 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. Mean differences were significant at the 5% probability level based on a paired Student's t-test.

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Potato: 'Crop 33' (left) with reference variety 'Adirondack Blue' (right)