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Denomination: 'Modoc'
Botanical Name: Solanum tuberosum
Applicant/Holder: Oregon State University
Office of Commercialization and Corporate Development
312 Kerr Administration Building
Corvallis, Oregon
United States of America
Breeder: Alvin R. Mosley, Oregon State University, Corvallis, United States of America
Agent in Canada: Global Agri Services Inc.
376 New Maryland Highway
New Maryland, New Brunswick
E3C 1E5
Tel: 506-462-9493
Application Date: 2006-04-11(priority claimed)
Application Number: 07-5733
Protective direction granted: 2007-02-14
Grant of Rights Date: 2009-03-18
Certificate Number: 3469
Grant of Rights Termination Date: 2027-03-18

Variety Description

Varieties used for comparison: 'Red LaSoda' and 'Norland'

Summary: 'Modoc' has shorter plants than the reference varieties. The tuber eyes are shallow for 'Modoc' while they are deep for 'Red LaSoda' and intermediate for 'Norland'. 'Modoc' has narrow cylindrical light sprouts while they are broad cylindrical for 'Red LaSoda' and ovoid for 'Norland'.


PLANT: semi-upright growth habit, intermediate type foliage structure
STEM: medium to strong anthocyanin colouration evenly distributed, thin, nodes with absent or very low swelling

LEAVES: dark green, intermediate silhouette, medium anthocyanin colouration on upper side of rachis and petiole, medium depth of veins, medium waviness of margin, strong glossiness on upper side, slight pubescence on leaves of apical rosette, medium presence of secondary leaflets
TERMINAL LEAFLET: medium ovate shape, acute to acuminate tip, obtuse to cordate base, absent or very low frequency of coalescence with lateral leaflets
LATERAL LEAFLET: medium in size, narrow ovate shape, acute tip, cordate base

INFLORESCENCE: low flowering profusion, small, flower buds are persistent, strong anthocyanin colouration of flower bud
COROLLA: red-violet, medium size, prominant star, medium anthocyanin colouration on peduncle

TUBER: round
TUBER SKIN: red, red at base of eye, smooth texture
TUBER EYES: shallow, even distribution, slight prominence of eyebrows
TUBER FLESH: white, no secondary colour

LIGHT SPROUT: medium size, narrow cylindrical shape, medium number of root tips, medium length lateral shoots
BASE: strong anthocyanin colouration, medium proportion of blue in anthocyanin colouration, very dense pubescence
TIP: smaller than base in size, closed habit, medium anthocyanin colouration, medium pubescence

Origin & Breeding History: 'Modoc' was selected at Klamath Falls, Oregon, in 1991 from a cross between 'ND1196-2R' and 'ND2225-1R'. The main goal of the cross was to obtain a variety with red skin and white flesh with an attractive appearance for the fresh market.

Tests & Trials: Trials for 'Modoc' were conducted in Drummond, New Brunswick in 2007. All entries were planted in single-row plots. Plots consisted of rows 22 metres long with 30 cm in row spacing between plants and spacing between rows of 91 cm. Measured characteristics were based on 10 measurements. Colour determinations were made using the 1986 RHS colour chart.

Comparison table for 'Modoc' with reference varieties 'Red LaSoda' and 'Norland'

Plant height (cm)

  'Modoc' 'Red LaSoda' 'Norland'
mean 38.1 53.0 51.7
std. deviation 1.8 2.9 2.0

Click on image for larger view
Potato: 'Modoc' (centre) with reference varieties 'Red LaSoda' (left) and 'Norland' (right)

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