Coquine

Potato

Variety Description

Variety used for comparison: 'Challenger'

Summary: The lightsprout of 'Coquine' is ovoid in shape whereas it is spherical for 'Challenger'. The intensity of the anthocyanin colouration at the base of the lightsprout for 'Coquine' is medium with a medium proportion of blue whereas the intensity of the anthocyanin colouration is weak with the proportion of blue as absent or low for 'Challenger'. The lightsprout of 'Coquine' has sparse pubescence at the base whereas the lightsprout of 'Challenger' has medium to dense pubescence at the base. The lightsprout tip of 'Coquine' has an intermediate habit whereas it has a closed habit for 'Challenger'. The leaf outline and second pair of lateral leaflets are medium to large for 'Coquine' whereas they are small to medium on 'Challenger'. The leaflet blade at the apical rosette is glabrous for 'Coquine' whereas it is pubescent in 'Challenger'. 'Coquine' has a shorter plant height than that of 'Challenger'. The plants of 'Coquine' mature mid-season whereas those of 'Challenger' mature late.

Description:

LIGHTSPROUT: medium size, ovoid, root tips few in numbers, short lateral shoots
LIGHTSPROUT BASE: medium intensity of anthocyanin colouration, medium proportion of blue in the anthocyanin colouration, sparse pubescence
LIGHTSPROUT TIP: medium size in relation to base, intermediate habit, absent or very weak intensity of anthocyanin colouration, medium pubescence

PLANT: foliage structure is an intermediate type where foliage is half open and stems are partly visible, semi-upright growth habit, medium maturity

STEM: no anthocyanin colouration

LEAF: medium to large outline, intermediate openness, medium green colour, absent or very low extent and absent or very weak intensity of anthocyanin colouration on the midrib of the upper side
SECOND PAIR OF LATERAL LEAFLETS: medium to large, narrower than long width in relation to length
LEAFLETS: medium presence of secondary leaflets, absent or very low frequency of coalescence of terminal and lateral leaflets, absent to weak waviness of margin, medium depth of veins, medium glossiness of upper side, no pubescence on blade at apical rosette

INFLORESCENCE: low frequency per plant, small, absent or very low extent of anthocyanin colouration on peduncle
FLOWER BUD: absent or very low extent of anthocyanin colouration
COROLLA: medium size, absent or very low extent and absent or very weak intensity of anthocyanin colouration on the inner side, absent or low proportion of blue in the anthocyanin colouration

TUBER: oval to long-oval shape, medium yellow flesh
TUBER EYE: shallow depth, yellow at base
TUBER SKIN: yellow, weak to medium anthocyanin colouration in reaction to light

Origin & Breeding History: The variety 'Coquine' originated from a cross made in 1998 between '92T.118.36' as the female parent and 'Emeraude' as the male parent in at the SICA Grocep, Station de Lavergne breeding station near Lavergne, France. Seed from the cross was sown in the greenhouse in 1999. The resulting tubers were harvested and planted in the field in the spring of 2000. One of the selected progeny was given the designation as 'Coquine'. Selection criteria were negative mass selection for agronomic characteristics and resistance to various diseases.

Tests & Trials: Trials for 'Coquine' were conducted during the 2013 growing season in Drummond, New Brunswick. Each variety plot consisted of 60 plants grown in a single row with a row length of 18.5 metres and a row spacing of 0.9 metres between rows. Plants were spaced 0.30 metres apart. The measured characteristics were based on 10 measurements per variety. Mean differences were significant at the 5% probability level based on a paired Student's t-test.

Comparison table for 'Coquine' with reference variety 'Challenger'

Plant height (cm)

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Potato: 'Coquine' (left) with reference variety 'Challenger' (right)