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Denomination: 'Marcy'
Botanical Name: Solanum tuberosum
Applicant/Holder: Cornell University
Cornell Center for Technology, Enterprise & Commercialization
395 Pine Tree Road, Suite 310
Ithaca, New York
United States of America
Breeder: Walter De Jong, Cornell University, Ithaca, United States of America
Agent in Canada: Skye View Farms Ltd.
508 Wynn Road
Elmwood, Prince Edward Island
C0A 1H3
Tel: 902-629-5970
Application Date: 2005-04-13(priority claimed)
Application Number: 05-4717
Protective direction granted: 2005-04-13
Protective direction withdrawn: 2008-02-25
Grant of Rights Date: 2009-03-05
Certificate Number: 3459
Grant of Rights Termination Date: 2027-03-05

Variety Description

Variety used for comparison: 'Atlantic'

Summary: 'Marcy' has taller plants than "Atlantic'. The leaves of 'Marcy' are dark green with an open silhouette while they are medium green with an intermediate silhouette for 'Atlantic'. 'Marcy' has lateral leaflets with a cordate base while they are lobed for 'Atlantic'. The presence of lateral leaflets is moderate for 'Marcy' while it is weak for 'Atlantic'. 'Marcy' has white corolla colour while it is red violet for 'Atlantic'. The light sprouts are large and spherical for 'Marcy' while they are medium size and ovoid for 'Atlantic'. 'Marcy' has a medium dense pubescence on the light sprout base while it is absent or low for 'Atlantic'.


PLANT: semi-upright growth habit, intermediate type foliage structure, mid-season maturity
STEM: absent or very weak anthocyanin colouration, medium thickness, nodes with medium swelling

LEAVES: dark green, open silhouette, absent or very weak anthocyanin colouration on upper side of rachis and on the petiole, medium depth of veins, absent or very weak waviness of margin, medium glossiness on upper side, no pubescence on leaves of apical rosette, medium presence of secondary leaflets
TERMINAL LEAFLET: medium ovate shape, acuminate tip, cordate base, medium frequency of coalescence with lateral leaflets
LATERAL LEAFLET: large, elliptical shape, acuminate tip, cordate base

INFLORESCENCE: high flowering profusion, medium size, flower buds are persistent, absent or very weak anthocyanin colouration of flower bud
COROLLA: white, medium size, prominant star, absent or very weak anthocyanin colouration of inner side and on the peduncle

TUBER: oval
TUBER SKIN: brown, white at base of eye, rough texture
TUBER EYES: shallow, even distribution, eyebrows are not prominent
TUBER FLESH: cream, no secondary colour

LIGHT SPROUT: large, spherical shape, medium number of root tips, short lateral shoots
BASE: medium anthocyanin colouration, medium proportion of blue in anthocyanin colouration, medium dense pubescence
TIP: smaller than base in size, closed habit, absent or very weak anthocyanin colouration, absent or very weak pubescence

Origin & Breeding History: 'Marcy' resulted from a cross made in early 1990 between the widely grown chipping variety 'Atlantic' and 'Q155-3', a Cornell University breeding line. The traits which were evaluated included chipping quality, freedom from internal and external physical defects, resistance to scab, resistance to golden nematode, specific gravity, maturity and yield.

Tests & Trials: Trials for 'Marcy' were conducted at Ferme Rivest Bourgeois, in Rawdon, Quebec in 2007. All entries were planted in single-row plots. There were 4 rows of the candidate variety and 5 rows of the reference variety with each row containing approximately 17 plants which were spaced 30 cm apart. Measured characteristics were based on 10 measurements.

Comparison tables for 'Marcy' with reference variety 'Atlantic'

Plant height (cm)

  'Marcy' 'Atlantic'
mean 69.53 66.40
std. deviation 2.23 3.32

Colour of corolla (RHS)

  'Marcy' 'Atlantic'
inner surface 155A 85C

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

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Potato: 'Marcy' (right) with reference variety 'Atlantic' (left)

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Potato: 'Marcy' (left) with reference variety 'Atlantic' (right)

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