Exempla

Potato

Denomination: 'Exempla'
Botanical Name: Solanum tuberosum
Applicant/Holder: Saatzucht Firlbeck GmbH & Co. KG
Johann-Firlbeck-Strasse 20
94348
Atting, Rinkam
Germany
Breeder: Josef Berger, Saatzucht Firlbeck GmbH & Co. KG, Atting, Rinkam, Germany
Agent in Canada: Solanum International Inc.
#7-52001 Range Road 275
Spruce Grove, Alberta
T7X 3V2
Canada
Tel: 780-963-4507
Application Date: 2002-05-03
Application Number: 02-3087
Protective direction granted: 2002-05-03
Grant of Rights Date: 2005-06-08
Certificate Number: 2120
Grant of Rights Termination Date: 2023-06-08

Variety Description

Varieties used for comparison: 'Bintje' and 'Yukon Gold'

Summary: 'Exempla' produces semi-erect plants whereas the plants of 'Bintje' and 'Yukon Gold' are erect. There is no anthocyanin on the flower bud of 'Exempla', while the reference varieties have moderate anthocyanin on the flower buds. 'Exempla' has an oblong shaped tuber, compared with the references which have an oval tuber. The light sprout base of 'Exempla' has weak anthocyanin. 'Bintje' has strong anthocyanin and 'Yukon Gold' has very strong anthocyanin on the light sprout base.

Description:

'Exempla' has a semi-erect growth habit and produces an intermediate type plant which is medium in height. The stem has no anthocyanin colouration and is medium in thickness. The stem wings are conspicuous and straight single. The stem nodes have slight swelling and have no anthocyanin colouration. 'Exempla' produces many branches.

'Exempla' has medium green leaves with pubescence on the lower surface. The leaf silhouette is medium. The leaf rachis has no anthocyanin colouration. There is pubescence on the top and bottom of the leaf rachis. The petiole has no anthocyanin and the stipules are medium in size. The terminal leaflet is medium ovate in shape with an acuminate shaped tip and truncate base which is symmetrical. The margin has weak waviness. There are four pairs of primary leaflets which are medium in size. The primary leaflets are medium ovate in shape with an acuminate shaped tip and asymmetrical, truncate base.

'Exempla' has a medium flowering profusion and produces a medium number of florets per inflorescence. The flower bud has no anthocyanin colouration and the buds are persistent. The flowers are white with no anthocyanin colouration on the inner side or outer side. The corolla is medium in size with no prominent star. The calyx and peduncle have no anthocyanin. The anthers are lemon yellow in colour and arranged in a broad cone shape. The stigma is capitate in shape and dark green in colour.

The tuber has yellow skin with no secondary colour. The skin texture is rough and flaky and the tuber shape is oblong. The tuber eyes are shallow in depth, few in number and are evenly distributed. The tuber eyebrows are not prominent. The flesh is medium yellow with no secondary colour. There are a medium number of tubers per plant.

The light sprout is ovoid in shape. The base has weak pubescence and weak, blue-violet anthocyanin colouration. The tip habit is closed. The tip has medium pubescence and is green, with no anthocyanin colouration. There are a medium number of light sprout root initials and the protrusion of lenticels is moderate. The lateral shoots are short.

Origin & Breeding History: 'Exempla' originated from a cross between the varieties 'Exquisa' x 'Arena'. The breeding took place at the breeding station of the applicant in Germany. The selection criteria were yield, quality for consumption, processing quality, flesh colour, tuber size and shape and skin texture.

Tests & Trials: Tests and trials for 'Exempla' were conducted at Vauxhall, Alberta in 2003. The trials consisted of 30 metre rows of each variety. The plants within each row were planted 30cm apart, and the spacing between the rows was 90cm. Measured characteristics were based on 50 measurements.


Comparison tables for 'Exempla' with reference varieties 'Bintje' and 'Yukon Gold'

Colour of of corolla (RHS)

  'Exempla' 'Bintje' 'Yukon Gold'
inner surface 155D N/A 85D

Tuber length (mm)

  'Exempla' 'Bintje' 'Yukon Gold'
mean 81.3 78.0 70.6
std. dev. 12.7 15.0 9.5

Tuber width (mm)

  'Exempla' 'Bintje' 'Yukon Gold'
mean 52.4 51.0 63.7
std. dev. 7.8 4.4 7.9

Tuber thickness (mm)

  'Exempla' 'Bintje' 'Yukon Gold'
mean 53.9 42.7 53.2
std. dev. 6.5 3.4 6.3