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Ivory Russet


Denomination: 'Ivory Russet'
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: 2012-06-01
Application Number: 12-7621
Grant of Rights Date: 2014-02-19
Certificate Number: 4737
Grant of Rights Termination Date: 2032-02-19

Variety Description

Variety used for comparison: 'Innovator'

Summary: The lightsprout of 'Ivory Russet' is ovoid in shape with short lateral shoots whereas it has a conical shape with medium lateral shoots for 'Innovator'. The intensity of anthocyanin colouration at the base of the lightsprout is medium to strong for 'Ivory Russet' with a medium proportion of blue whereas the intensity is weak with the proportion of blue as absent or low for 'Innovator'. 'Ivory Russet' has an absent or very low frequency of coalescence of the terminal and lateral leaflets whereas it is high in 'Innovator'. The waviness of the leaflet margins for 'Ivory Russet' is absent to weak whereas it is medium for 'Innovator'. 'Ivory Russet' has a shorter plant height than 'Innovator'. The extent of the anthocyanin colouration on the peduncle is medium for 'Ivory Russet' whereas it is absent or very low for 'Innovator'. The inflorescences of 'Ivory Russet' are small to medium sized whereas those of 'Innovator' are medium to large. 'Ivory Russet' has a small sized corolla whereas 'Innovator' has a medium corolla. The extent and intensity of the anthocyanin colouration on the inner side of the flower corolla of 'Ivory Russet' is medium whereas it is absent or very weak for 'Innovator'. The plants of 'Ivory Russet' mature early to mid-season whereas 'Innovator' matures mid-season. The tubers of 'Ivory Russet' have a long shape and have a white flesh whereas tubers of 'Innovator' have a long oval shape with a light yellow flesh. 'Ivory Russet' has weak anthocyanin colouration of the skin of the tuber in reaction to light whereas it is absent or very weak in 'Innovator'.


LIGHTSPROUT: medium size, ovoid, medium number of root tips, short lateral shoots
LIGHTSPROUT BASE: medium to strong intensity of anthocyanin colouration, with medium proportion of blue in the anthocyanin colouration, medium to dense pubescence
LIGHTSPROUT TIP: medium size in relation to base, intermediate habit, 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, early to medium maturity

STEM: low to medium extent of anthocyanin colouration along the entire stem

LEAF: medium outline, intermediate openness, medium to dark 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 size, narrower than long width in relation to length
LEAFLETS: weak to medium presence of secondary leaflets, absent or very low frequency of coalescence of terminal and lateral leaflets, absent to weak waviness of margin, medium to deep veins, medium glossiness of upper side, no pubescence on blade at apical rosette

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

TUBER: long shape, white flesh
TUBER EYES: shallow depth
TUBER SKIN: reddish brown, yellow at base of eye

Origin & Breeding History: The origin of 'Ivory Russet' (experimental designation HZD-99-711) is the result of the cross made in 1998 between 'RZ-93-7105' as the female parent and 'Innovator' as the male parent at the HZPC Research & Development Centre in Metslawier, The Netherlands. Selection criteria included internal and external quality, yield and resistances against different diseases and pests.

Tests & Trials: Tests and trials for 'Ivory Russet' were conducted during the 2012 growing season in Drummond, New Brunswick. Each plot per variety 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.

Comparison table for 'Ivory Russet' with reference variety 'Innovator'

Plant height (cm)

  'Ivory Russet' 'Innovator'
mean 44.8 55.7
std. deviation 3.0 2.7

Click on image for larger view
Ivory Russet
Potato: 'Ivory Russet' (left) with reference variety 'Innovator' (right)

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