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Denomination: 'Radtkopink'
Trade name: Double Pink Knock Out
Botanical Name: Rosa
Applicant/Holder: The Conard-Pyle Company
8 Federal Road, Suit 6
West Grove, Pennsylvania
United States of America
Breeder: Jason Brown, Elkton, United States of America
Cockcroft Dave, Cockcroft, Dave, Granby, United States of America
Jerome Lavalee, Granby, United States of America
Agent in Canada: Variety Rights Management
475 County Road 18
R.R. #2
Oxford Station, Ontario
K0G 1T0
Tel: 613-258-9015
Application Date: 2008-06-23
Application Number: 08-6391
Grant of Rights Date: 2010-01-28
Certificate Number: 3757
Grant of Rights Termination Date: 2028-01-28

Variety Description

Variety used for comparison: 'Radcon' (Pink Knock Out)

Summary: The young shoots of 'Radtkopink' have weak anthocyanin colouration while those of 'Radcon' have none. 'Radtkopink' is dark green on the upper side of the leaves while 'Radcon' is medium green. There are more petals on the flowers of 'Radtkopink' than on 'Radcon'. 'Radtkopink' has loose to medium density of petals while 'Radcon' has very loose petals. The petals of 'Radtkopink' are narrower than those of 'Radcon'. The secondary colour on the petals of 'Radtkopink' is purple red while that on 'Radcon' is light blue pink to white. 'Radtkopink' has a predominantly light yellow filament on the outer stamen while 'Radcon' has a predominantly orange/brown red filament.


PLANT: shrub type, semi upright growth habit
PRICKLES: few, greenish/purplish

LEAF: medium to large, dark green colouration on upper side, no anthocyanin colouration, medium glossiness on upper side, weak undulation of margin
TERMINAL LEAFLET: ovate, rounded base, acuminate apex

FLOWER SHOOT: no flowering laterals, very few to few flowers
FLOWER BUD: medium ovate in logitudinal section
SEPAL: medium extensions
FLOWER: pink colour group, green/pink centre, loose to medium density of petals, round, flattened convex profile of upper part, convex profile of lower part, medium fragrance
PETAL: reflex one-by-one, obcordate, very weak to weak incisions, weak to medium reflexing of margin, very weak to weak undulation, two colours on inner side (excluding basal spot), lighter colour towards base to even colour, purple red (RHS N57A-B) with purple red (RHS 61C-D) at base on inner side
PETAL BASAL SPOT: very small, greenish on inner side, blue pink to light blue pink (RHS 62A-B) on outer side
OUTER STAMEN: light yellow filament
HIP: small to medium size at petal fall, pitcher shape in longitudinal section, orange/red at mature stage

Origin & Breeding History: 'Radtkopink' originated from a naturally occurring, spontaneous mutation of the variety 'Radtko'. The new variety was discovered in 2004 within a group of 500 three year old rooted cuttings of the variety 'Radtko' that were propagated at Granby, Conneticut, United States in 2001. 'Radtkopink' was selected based on flower colour, vegetation vigour, foliage appearance and plant growth habit.

Tests & Trials: Trials for 'Radtkopink' were conducted in a polyhouse in Oxford Station, Ontario in 2008. Fifteen plants of the candidate and twelve plants of the reference variety were grown in #2 nursery pots spaced approximately 0.5 metres apart.

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Rose: 'Radtkopink' (left) with reference variety 'Radcon' (right)

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Rose: 'Radtkopink' (left) with reference variety 'Radcon' (right)

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