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Denomination: 'Northstar'
Previously Proposed Denomination: 'V0123-25'
Botanical Name: Solanum tuberosum
Applicant/Holder: Agriculture & Agri-Food Canada, Lethbridge
Lethbridge Research Centre, 5403 - 1 Avenue, South
P.O. Box 3000
Lethbridge, Alberta
T1J 4B1
Breeder: Dermot Lynch, Agriculture & Agri-Food Canada, Lethbridge, Alberta
Agent in Canada: Agriculture & Agri-Food Canada
Office of Intellectual Property and Commercialization
107 Science Place
Saskatoon, Saskatchewan
S7N 0X2
Tel: (306) 385-9316
Application Date: 2002-02-08(priority claimed)
Application Number: 02-2989
Protective direction granted: 2002-02-08
Protective direction withdrawn: 2007-03-26
Grant of Rights Date: 2007-11-16
Certificate Number: 2985
Date rights surrendered: 2010-11-18

Variety Description

Varieties used for comparison: 'Snowden' and 'Atlantic'

Summary: 'Northstar' has a more spreading growth habit and shorter plant height than the reference varieties. 'Northstar' has a shorter leaf length than the reference varieties. 'Northstar' has white flowers while 'Atlantic' has red violet flowers. The tubers of 'Northstar' have a smooth skin texture while the reference varieties have a rough skin texture. 'Northstar' has an oval tuber shape while the reference varieties have a round tuber shape. 'Northstar' has shallower tuber eyes than the reference varieties. 'Northstar' has no anthocyanin colouration on the light sprout base while 'Atlantic' has medium anthocyanin.


PLANT: spreading growth habit, foliage structure intermediate between stem and leaf type, matures mid-season

STEM: no anthocyanin colouration, thick, nodes with medium degree of swelling

LEAF: medium green, intermediate silhouette, no anthocyanin colouration on upper side of rachis and petiole, weak waviness of margin, moderate presence of secondary leaflets
TERMINAL LEAFLET: medium ovate, acuminate tip, truncate base
LATERAL LEAFLET: medium size, medium ovate, acuminate tip, truncate base

INFLORESCENCE: medium flowering profusion, medium size
BUD: persistent, no anthocyanin colouration
COROLLA: white, medium size, very prominent star, no anthocyanin colouration on peduncle

TUBER: oval
TUBER SKIN: light beige, white at base of eye, smooth texture,
TUBER EYES: shallow in depth, evenly distributed, eyebrows not prominent
TUBER FLESH: white, no secondary colour

LIGHT SPROUT: medium size, ovoid, medium number of root tips, short lateral shoots
BASE: no anthocyanin colouration, medium pubescence
TIP: smaller than base, closed habit, no anthocyanin colouration, medium pubescence

Origin & Breeding History: 'Northstar' originated from a cross made in 1986 at the Agriculture & Agri-Food Canada Research Station in Lethbridge, Alberta. The female parent was the variety 'Niska' and the male parent was the breeding clone ND860-2, from North Dakota State University.

Tests & Trials: Trials for 'Northstar' were conducted in 2006 at Vauxhall, Alberta. A randomized block design was used with three replicates per variety. Plots consisted of rows 7.6 metres long and between row spacing of 91 cm. Plants within each row were planted 30 cm apart. Measured characteristics were based on 50 measurements and all colour determinations were made using the Royal Horticultural Society (RHS) Colour Chart.

Comparison tables for 'Northstar' with reference varieties 'Snowden' and 'Atlantic'

Plant height (cm)

  'Northstar' 'Snowden' 'Atlantic'
mean 56.8 66.8 70.2
std. deviation 9.7 4.0 5.3

Leaf length (cm)

  'Northstar' 'Snowden' 'Atlantic'
mean 23.7 27.4 26.9
std. deviation 2.4 3.5 1.7

Flower colour (RHS)

  'Northstar' 'Snowden' 'Atlantic'
upper side 155D 155B 81C

Click on image for larger view
Potato: 'Northstar' (centre) with reference varieties 'Atlantic' (left) and 'Snowden' (right)

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