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Denomination: 'Radley'
Botanical Name: Solanum tuberosum
Applicant/Holder: IPR B.V.
P.O. Box 88
8500 AB
Breeder: R. P. Graveland, IPR B.V., Joure, Netherlands
Agent in Canada: HZPC-Americas Corp.
19 Regis Duffy Drive
Charlottetown, Prince Edward Island
C1E 0K5
Tel: 902-892-2004
Application Date: 2017-10-06
Provisional Protection:: 2017-10-06
Application Number: 17-9308
Grant of Rights Date: 2020-02-21
Certificate Number: 6146
Grant of Rights Termination Date: 2040-02-21

Variety Description

Variety used for comparison: 'Mozart'

Summary: The lightsprout of 'Radley' is ovoid whereas that of 'Mozart' is spherical. The pubescence at the base of the lightsprout of 'Radley' is dense whereas the pubescence is of medium density on the lightsprout of 'Mozart'. The anthocyanin colouration at the tip of the lightsprout of 'Radley' is of medium intensity whereas it is weak for 'Mozart'. The extent of anthocyanin colouration on the stem of 'Radley' is high whereas it is low to medium for 'Mozart'. The presence of secondary leaflets on the leaves of 'Radley' is weak to medium whereas it is medium to strong for 'Mozart'. 'Radley' has a very high extent of anthocyanin colouration along the midrib of the upper side of the leaf whereas the extent is high on 'Mozart'. The plants of 'Radley' are taller than those of 'Mozart'. 'Radley' has a medium sized corolla whereas it is large for 'Mozart'. The extent of anthocyanin colouration on the inner side of the corolla of 'Radley' is high whereas it is medium for 'Mozart'. The tuber of 'Radley' has a short oval shape whereas it is oval for 'Mozart'. The colour at the base of the tuber eye is red for 'Radley' whereas it is yellow for 'Mozart'.


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

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

STEM: high extent of anthocyanin colouration along entire stem

LEAF: medium size outline, intermediate openness, weak to medium presence of secondary leaflets, medium green upper side, very high extent and medium to strong intensity of anthocyanin colouration of upper side of midrib, absent or very low frequency of coalescence of terminal and lateral leaflets
SECOND PAIR OF LATERAL LEAFLETS: medium size, leaflet is slightly narrower than long
LEAFLET: absent or very weak waviness of margin, shallow veins, dull upper side, pubescence on blade at apical rosette

PEDUNCLE: low extent of anthocyanin colouration
INFLORESCENCE: medium frequency per plant, medium size
FLOWER BUD: low extent of anthocyanin colouration
COROLLA: medium size
COROLLA (INNER SIDE): high extent of anthocyanin colouration, strong intensity of anthocyanin colouration , absent or low proportion of blue in anthocyanin colouration

TUBER: short oval, light yellow flesh
TUBER EYE: shallow depth, red at base

Origin & Breeding History: 'Radley' (experimental designation HZC 07-6049) originated from the cross between 'Rosella', as the female parent, and 'Dakota Rose', as the male parent, conducted in 2006 at HZPC Research B.V., in Metslawier, The Netherlands. One of the progeny, designated HZC 07-6049, was identified in 2007 and subsequently tested in The Netherlands and other locations abroad. Selection criteria was based on yield, internal and external quality as well as disease and insect resistance.

Tests & Trials: The comparative trial for 'Radley' was conducted by Global Agri Services Inc. during the 2018 growing season in Drummond, New Brunswick. The trial consisted of a single, 21 metre long row containing 70 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. The mean difference was significant at the 5% probability level based on a paired Student's t-test.

Comparison table for 'Radley' with reference variety 'Mozart'

Plant height (cm)

  'Radley' 'Mozart'
mean 64.1 44.1
std. deviation 2.9 3.2

Click on image for larger view
Potato: 'Radley' (left) with reference variety 'Mozart' (right)

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