Red Chinook

Potato

Variety Description

Variety used for comparison: 'Rosara'

Summary: The lightsprout of 'Red Chinook' has dense to very dense pubescence at the base and absent to sparse pubescense at the tip whereas the lightsprout of 'Rosara' has sparse pubescence at the base and sparse to medium pubescence at the tip. The intensity of anthocyanin colouration at the base of the lightsprout is strong for 'Red Chinook' with the proportion of blue as absent or low whereas the intensity is very strong with a medium proportion of blue for 'Rosara'. Along the entire stem, the extent of the anthocyanin colouration is very high for 'Red Chinook' whereas it is low to medium in 'Rosara'. The waviness of the leaflet margins for 'Red Chinook' is absent or very weak whereas it is medium in 'Rosara'. The extent of the anthocyanin colouration on the flower bud and the peduncle is high for 'Red Chinook' whereas it is low for 'Rosara'. The plants of 'Red Chinook' have a high extent and strong intensity of anthocyanin colouration on the the midrib of the upper side of the leaf whereas plants of 'Rosara' have a low extent and weak intensity. 'Red Chinook' has a shorter plant height than 'Rosara'. The plants of 'Red Chinook' mature mid-season whereas those of 'Rosara' mature early to mid-season. The tubers of 'Red Chinook' have a short oval to oval shape whereas the tubers of 'Rosara' have an oval to long oval shape.

Description:

LIGHTSPROUT: medium size, ovoid, medium number of root tips, short lateral shoots
LIGHTSPROUT BASE: strong intensity of anthocyanin colouration, absent or low proportion of blue in anthocyanin colouration, dense to very dense pubescence
LIGHTSPROUT TIP: medium size in relation to base, closed habit, medium intensity of anthocyanin colouration, absent to sparse pubescence

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

STEM: very high extent of anthocyanin colouration along the entire length

LEAF: medium size outline, intermediate openness, dark green colour, high extent and strong intensity of anthocyanin colouration on the midrib of the upper side
SECOND PAIR OF LATERAL LEAFLETS: medium size, 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 or very weak waviness of margin, medium depth of veins, medium glossiness of upper side, pubescence on blade at apical rosette

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

TUBER: short oval to oval shape, medium yellow flesh
TUBER EYE: shallow depth, red at base
TUBER SKIN: red

Origin & Breeding History: The variety 'Red Chinook' originated from a cross between 'BRS 97-118' as the female parent and 'BRS 96-200' as the male parent, made at the Brunia's private breeding facility in Kraggenburg, The Netherlands in 2002. Seed from the cross was sown in the greenhouse in Kraggenburg in 2003. The resulting tubers were harvested and planted in the field in the spring of 2004. One of the selected progeny was given the designation 'Red Chinook'. Selection criteria were negative mass selection for agronomic characteristics and resistance to various diseases.

Tests & Trials: Trials for 'Red Chinook' 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 'Red Chinook' with reference variety 'Rosara'

Plant height (cm)

Click on image for larger view

Potato: 'Red Chinook' (left) with reference variety 'Rosara' (right)