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Rochdale Gold-Dorée


Denomination: 'Rochdale Gold-Dorée'
Previously Proposed Denomination: 'F88088'
Botanical Name: Solanum tuberosum
Applicant/Holder: Agriculture & Agri-Food Canada, Fredericton
Fredericton Research and Development Centre
850 Lincoln Road, P.O. Box 20280
Fredericton, New Brunswick
E3B 4Z7
Breeder: T. Richard Tarn, Agriculture & Agri-Food Canada, Fredericton, New Brunswick
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: 2003-08-21
Application Number: 03-3819
Grant of Rights Date: 2007-05-09
Certificate Number: 2730
Grant of Rights Termination Date: 2025-05-09

Variety Description

Variety used for comparison: 'Yukon Gold'

Summary: 'Rochdale Gold-Dorée' has a shorter plant height and wider leaf width than 'Yukon Gold'. 'Rochdale Gold-Dorée' has a medium ovate terminal leaflet shape while 'Yukon Gold' has a narrowly ovate to lanceolate leaf shape. 'Rochdale Gold-Dorée' has a cordate shaped base on the terminal leaflet while 'Yukon Gold' has an acute shaped base. 'Rochdale Gold-Dorée' has a higher flowering profusion than 'Yukon Gold'. The flowers are white for 'Rochdale Gold-Dorée' while they are red-violet for 'Yukon Gold'. The tuber of 'Rochdale Gold-Dorée' has yellow colour at the base of the eye while 'Yukon Gold' has red colour. 'Rochdale Gold-Dorée' has an ovoid shaped light sprout while 'Yukon Gold' has a spherical shaped light sprout. 'Rochdale Gold-Dorée' has sparser pubescence on the light sprout base and denser pubescence on the tip than 'Yukon Gold'.


'Rochdale Gold-Dorée' has a semi-upright growth habit with leaf type foliage. The stem has absent to weak anthocyanin colouration which is located in the leaf axils. The stems are medium to thick and the nodes have low to medium swelling.

The leaves are light green in colour and the leaf silhouette is intermediate. The leaf rachis and petiole have no anthocyanin colouration. The terminal leaflet is medium ovate in shape with an acuminate shaped tip and cordate base. There is an absent or very low frequency of coalescence of the terminal and lateral leaflets. The lateral leaflets are large in size and narrowly ovate in shape with an acute to acuminate shaped tip and cordate base. The veins on the leaflets are medium in depth and the margins have weak waviness. The leaflets are dull to medium in glossiness and the leaf blades have medium pubescence at the apical rosette. The presence of secondary leaflets is medium.

'Rochdale Gold-Dorée' has a high flowering profusion and a medium inflorescence size. The flower buds are moderately persistent and have strong anthocyanin colouration. The corolla is white in colour, small in size and has a prominent star. The peduncle has no anthocyanin colouration.

The tubers have yellow skin with yellow colour at the base of the eye. The skin develops medium anthocyanin colouration when exposed to light. The skin texture is smooth and the tubers are round in shape. The tuber eyes are shallow in depth and are evenly distributed. The tuber eyebrows are not prominent. The tuber flesh is medium yellow in colour with no secondary colour present.

'Rochdale Gold-Dorée' has a medium sized light sprout which is ovoid in shape. The light sprout base has medium anthocyanin with an absent to low proportion of blue. The base has sparse pubescence. The tip of the light sprout is smaller in size in relation to the base. The tip has a closed habit and has absent or very weak anthocyanin colouration. The tip has dense pubescence. There are a medium number of root tips and the lateral roots are short in length.

Origin & Breeding History: 'Rochdale Gold-Dorée' originated from a cross between 'AC Chaleur' and 'Agitato', made by Agriculture & Agri-Food Canada in 1984. 'Rochdale Gold-Dorée' was originally selected from the F1 progeny and has been tested in replicated trials by Agriculture & Agri-Food Canada.

Tests & Trials: Trials for 'Rochdale Gold-Dorée' were conducted in North Tilley, New Brunswick in 2004. A randomized block design was used with four replicates per variety. All entries were planted in single-row plots and each entry had one replicate per block. Plots consisted of rows 5.5 meters long and between row spacing of 91 cm. Measured characteristics were based on 10 measurements. Colour determinations were made using the RHS colour chart.

Comparison tables for 'Rochdale Gold-Dorée' with reference variety 'Yukon Gold'

Plant height (cm)

  'Rochdale Gold-Dorée' 'Yukon Gold'
mean 64.1 76.4
std. deviation 4.7 4.1

Leaf width (cm)

  'Rochdale Gold-Dorée' 'Yukon Gold'
mean 28.3 23.7
std. deviation 2.5 2.8

Colour of inner surface of corolla (RHS)

  'Rochdale Gold-Dorée' 'Yukon Gold'
colour 157B 76B
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