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Blue Lady


Denomination: 'Blue Lady'
Botanical Name: Solanum tuberosum
Applicant/Holder: Fobek B.V.
Niieuwebildtdijk 236
NL-9076 PM ST.
Breeder: Peter Keijzer, Fobek B.V., Annaparochie, Netherlands
Agent in Canada: Tuberosum Technologies Inc.
P.O.Box 23
Broderick, Saskatchewan
S0H 0L0
Tel: 306-867-9528
Application Date: 2005-10-21
Application Number: 05-5121
Grant of Rights Date: 2009-02-17
Certificate Number: 3447
Grant of Rights Termination Date: 2027-02-17

Variety Description

Variety used for comparison: 'Caribe'

Summary: 'Blue Lady' has a shorter plant height and shorter leaf length than 'Caribe'. 'Blue Lady' has red-violet corolla colour while 'Caribe' has blue-violet corolla colour. 'Blue Lady' has very strong anthocyanin colouration on the peduncle while 'Caribe' has no anthocyanin. The depth of the eyes on the tuber is shallower for 'Blue Lady' than for 'Caribe'. 'Blue Lady' has a spherical shaped light sprout while 'Caribe' has an ovoid shaped light sprout. 'Blue Lady' has a light sprout tip that is equal in size in relation to the base while 'Caribe' has a light sprout tip that is smaller in size in relation to the base.


PLANT: spreading growth habit, leaf type foliage structure
STEM: very strong anthocyanin colouration evenly distributed along the stem, thin, nodes with low swelling

LEAVES: dark green, open silhouette, very strong anthocyanin colouration on upper side of rachis and petiole, medium to deep veins, weak waviness of margin, medium glossiness on upper side, no pubescence on leaves at apical rosette, medium presence of secondary leaflets
TERMINAL LEAFLET: narrow ovate shape, acute to acuminate tip, obtuse to cordate base, absent or very low frequency of coalescence with lateral leaflets
LATERAL LEAFLETS: medium size, narrow ovate shape, acute to acuminate tip, cordate base

INFLORESCENCE: medium flowering profusion, medium size, flower buds persistent, absent or very weak anthocyanin colouration in flower bud.
COROLLA: red-violet, strong anthocyanin colouration on inner side, small to medium size, moderately prominent star, very strong anthocyanin colouration on peduncle

TUBER: round
TUBER SKIN: blue, blue at base of eye, smooth texture
TUBER EYES: shallow in depth, evenly distributed, eyebrows slightly prominent
TUBER FLESH: medium yellow, no secondary colour

LIGHT SPROUT: medium size, spherical, low number of root tips, short lateral shoots
BASE: very strong anthocyanin colouration, high proportion of blue in anthocyanin, sparse pubescence
TIP: equal to base in size, closed habit, strong anthocyanin colouration, dense pubescence.

Origin & Breeding History: 'Blue Lady' originated from a cross between 'Oscar' and VE 8044, made at Beetgumermolen, The Netherlands in 1994. 'Blue Lady' was selected in 1996 at Minnertsga, The Netherlands and tested under the experimental designation AS 95-7-8. A phenotypic recurrent selection technique was utilized in its development.

Tests & Trials: Trials for 'Blue Lady' were conducted in Drummond, New Brunswick in 2006. All entries were planted in single-row plots. Plots consisted of rows 22 metres long with 30 cm in row spacing and between row spacing of 91 cm. Measured characteristics were based on 10 measurements. Colour determinations were made using the 1986 RHS colour chart.

Comparison tables for 'Blue Lady' with reference variety 'Caribe'

Plant height (cm)

  'Blue Lady' 'Caribe'
mean 49.9 55.7
std. deviation 4.5 3.7

Leaf length (cm)

  'Blue Lady' 'Caribe'
mean 28.1 35.4
std. deviation 1.7 2.3

Colour of corolla (RHS)

  'Blue Lady' 'Caribe'
inner surface 90B 97B

Click on image for larger view
Blue Lady
Potato: 'Blue Lady' (left) with reference variety 'Caribe' (right)

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