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Denomination: 'Radyod'
Trade name: Blushing Knockout
Botanical Name: Rosa
Applicant/Holder: The Conard-Pyle Company
8 Federal Road, Suit 6
West Grove, Pennsylvania
United States of America
Breeder: John Bell, Lancaster, 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: 2003-05-15
Application Number: 03-3676
Grant of Rights Date: 2004-12-15
Certificate Number: 2045
Grant of Rights Termination Date: 2022-12-15

Variety Description

Varieties used for comparison: 'Nearly Wild' and 'Radcon' (Pink Knockout)

Summary: 'Radyod' has medium to strong intensity of anthocyanin colouration of the young shoots, while in 'Nearly Wild' it is absent to very weak and in 'Radcon' it is strong to very strong. The hue of the anthocyanin colouration of the young shoot of 'Radyod' is purple while it is reddish brown in 'Nearly Wild'. 'Radyod' has a sparse number of short and long prickles/thorns on the stem while 'Nearly Wild' has very many short prickles/thorns and medium number of long prickles/thorns. The colour of the prickles/thorns of 'Radyod' are red while they are yellow to brown red for 'Nearly Wild'. The flower bud shape in longitudinal cross section of 'Radyod' is pointed while it is ovoid in 'Nearly Wild'. 'Radyod' has weak sepal extensions while in 'Nearly Wild' they are none to very weak. The length of the sepal in 'Radyod' is longer than in 'Nearly Wild'. 'Radyod' a flattened convex upper flower shape when viewed from the side while in 'Radcon' it is flat. The lower flower shape when viewed from the side of 'Radyod' is flat while it is flattened convex in 'Nearly Wild'. 'Radyod' has a semi-double flower type while 'Nearly Wild' is a single. The flower colour of 'Radyod' is light pink while 'Radcon' and 'Nearly Wild' are medium pink. 'Radyod' has a white to yellow coloured filament of the outer stamen while in 'Radcon' it is white. The length of the style in 'Radyod' is medium while it is long in 'Nearly Wild'. 'Radyod' has a stigma that is positioned below the anthers while it is positioned above the anthers in 'Nearly Wild'. The receptacle of 'Radyod' has prickles while 'Nearly Wild' does not. 'Radyod' has better resistance to black spot than 'Nearly Wild'.


'Radyod' is a landscape small shrub rose variety which has a upright to bushy growth habit. The young shoot has medium to strong anthocyanin colouration with a purple hue. The stem has a sparse number of short and long prickles which are concave in shape and red in colour. The leaves are dark green and have very weak glossiness on the upper side. There are three to seven leaflets. The terminal leaflet has a serrate margin and a thin or flexible to leathery texture. The leaflet base is rounded.

'Radyod' flowers mid-season and flowers almost continuously for four to ten weeks. There are a low to medium number of flowers per flowering shoot and the flower pedicel has a medium to many number of hairs or prickles. The flower bud is pointed and sepal extensions are weak. The flower is round when viewed from above, flattened convex on the upper part when viewed from the side and flat on the lower part when viewed from the side. The flower center is normal and the corolla is semi-double. 'Radyod' has light pink flowers. The petals have a very small sized spot at the base of the inner and outer side. The petal margin has very weak reflexing and weak undulation. The outer stamen has a white to yellow filament. The style is medium in length, yellow and red and has weak hairiness on the upper half. The stigma is positioned below the anthers. The receptacle is small, pitcher shaped and has prickles. The flower has no fragrance. 'Radyod' is resistant to mildew and moderately resistant to black spot.

Origin & Breeding History: 'Radyod' was discovered in June 2001 amongst plants of the rose variety 'Radrazz' (Knockout) growing in production fields at Blairsville, Pennsylvania, USA and is believed to be a naturally occurring mutation from this variety. The new variety was selected for its distinctive pink bud and flower colouration and its compact, spreading and mounding shrub growth habit.

Tests & Trials: Tests and trials for 'Radyod' were conducted in 2003 at Oxford Station, Ontario. Ten plants of each variety were field grown in a row being spaced 0.4 metres apart. Rows were 1 metre apart.

Comparison tables for 'Radyod' with reference varieties 'Nearly Wild' and 'Radcon'

Sepal length (mm)

  'Radyod' 'Nearly Wild' 'Radcon'
mean 26.9 12.3 29.4
std. deviation 4.65 1.49 6.11

Colour on outer side of petal (RHS)

  'Radyod' 'Nearly Wild' 'Radcon'
margin 65B 66C 57D
middle 65B 66C 57D
base white white white

Colour on inner side of petal (RHS)

  'Radyod' 'Nearly Wild' 'Radcon'
margin 65B 66C 57D
middle 65B 66C 57C
base white white white
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