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Lady Jo


Denomination: 'Lady Jo'
Botanical Name: Solanum tuberosum
Applicant/Holder: C. Meijer B.V.
Stationsweg 18a, 4416 PJ Kruiningen
Postbus 1, 4416 AG
Breeder: J.P.M. Muijsers, C. Meijer B.V., Kruiningen, Netherlands
Agent in Canada: Parkland Seed Potatoes Ltd.
2908 Ellwood Drive, South West
Edmonton, Alberta
T6X 0A9
Tel: 780-435-3122
Application Date: 2005-10-26
Application Number: 05-5124
Grant of Rights Date: 2012-09-04
Certificate Number: 4400
Date rights surrendered: 2015-09-04

Variety Description

Varieties used for comparison: 'Lady Claire' and 'Agria'

Summary: The plants of 'Lady Jo' are taller than the plants of the reference varieties. The tuber of 'Lady Jo' is round in shape while the tuber of 'Lady Claire' is short oval to oval and the tuber of 'Agria' is long oval. The size of the light sprout tip in relation to the base is large for 'Lady Jo' while it is medium for 'Lady Claire' and small for 'Agria'. The light sprout of 'Lady Jo' has dense pubescence at the tip while the light sprout of 'Agria' has sparse pubescence.


PLANT: semi-upright to spreading growth habit, foliage structure intermediate between stem and leaf type, mid-season maturity

STEM: low extent of anthocyanin colouration located along entire stem

LEAVES: large, intermediate openness, medium to strong presence of secondary leaflets, medium green, absent or very low extent of anthocyanin colouration on midrib of upper side, absent or very weak intensity of anthocyanin colouration on midrib of upper side, absent or very low frequency of coalescence of terminal and lateral leaflets
SECOND PAIR OF LATERAL LEAFLETS: medium to large, narrower than long width in relation to length
LEAFLETS: absent or very weak waviness of margin, shallow veins, dull on upper side, no pubescence on blade at apical rosette

INFLORESCENCE: medium frequency of inflorescences per plant, medium size, absent or low extent of anthocyanin colouration on peduncle
FLOWER BUD: medium extent of anthocyanin colouration
COROLLA: medium size, absent or very weak anthocyanin colouration on inner side with absent or low proportion of blue, absent or very low extent of anthocyanin on inner side

TUBER: round, light yellow flesh
TUBER EYES: medium depth
TUBER SKIN: light beige, yellow at base of eye

LIGHT SPROUT: medium size, spherical shape, few root tips, short to medium length lateral shoots
LIGHT SPROUT BASE: strong anthocyanin colouration, medium to high proportion of blue in anthocyanin colouration, dense pubescence
LIGHT SPROUT TIP: large size in relation to base, habit intermediate between closed and open, strong anthocyanin colouration, dense pubescence.

Origin & Breeding History: The variety 'Lady Jo' originated from a cross between 'Lady Amelia' (CMK19987-203-014) and VE74-45, made at Rilland, the Netherlands in 1992. Selection criteria included yield, maturity, depthness of eyes, disease resistance, dry matter content, cooking type, cooking quality and storability.

Tests & Trials: Trials for 'Lady Jo' were conducted during the summer of 2010 in Drummond, New Brunswick. Plots consisted of one row with a row length of 18.5 meters and a row spacing of 90 cm. Plants were spaced 30 cm apart within the row. There were 60 plants per variety in the trial. Measured characteristics were based on ten measurements.

Comparison table for 'Lady Jo' with reference varieties 'Lady Claire' and 'Agria'

Plant height (cm)

  'Lady Jo' 'Lady Claire' 'Agria'
mean 70 52 58
std. deviation 3.9 3.1 4.5

Click on image for larger view
Lady Jo
Potato: 'Lady Jo' (left) with reference varieties 'Lady Claire' (centre) and 'Agria' (right)

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