White Yograceland

Chrysanthemum

Denomination: 'White Yograceland'
Trade name: White Graceland
Botanical Name: Chrysanthemum
Applicant/Holder: Syngenta Crop Protection AG
Schwarzwaldallee 215
Basel
4058
Switzerland
Breeder: Wendy Bergman, Syngenta Flowers, Inc., Alva, United States of America
Agent in Canada: BioFlora Inc.
38723 Fingal Line
R.R. #1
St. Thomas, Ontario
N5P 3S5
Canada
Tel: 519-631-6241
Application Date: 2001-09-27
Application Number: 01-2837
Grant of Rights Date: 2006-02-22
Certificate Number: 2380
Date rights surrendered: 2013-03-01

Variety Description

Variety used for comparison: 'White Yoblush'

Summary: 'White Yograceland' has fewer primary lateral shoots than 'White Yoblush'. The leaf of 'White Yograceland' is wider than 'White Yoblush'. 'White Yograceland' has a longer lower lateral leaf lobe than 'White Yoblush'. 'White Yograceland' has an anemone centered single flower head type while 'White Yoblush' has a typical single flower head type. The flower head diameter of 'White Yograceland' is larger than 'White Yoblush'. 'White Yograceland' has longer ray florets than 'White Yoblush'. The disc diameter of 'White Yograceland' is larger than 'White Yoblush'.

Description:

'White Yograceland' is a year round, pinched, disbud pot chrysanthemum variety with an eight week response time. The stem has no anthocyanin colouration. The leaves have an asymmetrically acute shaped base and the margins of sinus between lateral lobes are diverging to parallel.

The flowers are an anemone centered daisy type and are white in colour. The outer ray florets are broad in width, reflexing along the longitudinal axis and flat to convex in cross section. The tip of the ray floret is emarginate to mamillate. The disc florets are yellow green in colour before anther dehiscence and creamy yellow in colour at anther dehiscence. The enlarged tubular disc florets are numerous, massed and clearly visible at all stages of flower development.

Origin & Breeding History: 'White Yograceland' is the product of a planned breeding program, conducted by Wendy R. Bergman of Yoder Brothers Inc. of Barberton, Ohio, USA. It is a naturally occurring whole plant mutation of a proprietary induced mutation that originated by exposing unrooted cuttings of the Chrysanthemum variety 'Yograceland' to x-ray radiation in October, 1998 in Fort Myers, Florida. It was discovered and selected by the breeder as a single flowering plant within a population of plants of the irradiated selection in April, 1999 in Fort Myers, Florida. Selection was based on its uniform plant growth habit, desirable inflorescence form and floret colours, fast response time and excellent post production longevity. Asexual reproduction was initiated in July, 1999 by vegetative tip cuttings in a controlled environment in Fort Myers, Florida, USA.

Tests & Trials: Tests and trials were conducted at Yoder Canada Ltd. in Leamington, Ontario in the fall of 2004. Trials were performed under greenhouse conditions which approximate those used in commercial greenhouse practice. 40 unrooted cuttings of both the candidate and reference variety were directly stuck into 15 cm pots with 4 cuttings per pot. Plants were spaced 30 cm apart and were pinched once prior to short day treatment. All plants were disbudded. Observations and measurements were taken on 10 plants of each variety, and all colour measurements were made using the RHS Colour chart 2001.


Comparison tables for 'White Yograceland' with reference variety 'White Yoblush'

Number of primary lateral shoots

  'White Yograceland' 'White Yoblush'
mean 3.4 4.6
std. deviation 0.52 0.84

Leaf width (cm)

  'White Yograceland' 'White Yoblush'
mean 5.5 4.9
std. deviation 0.33 0.41

Lower leaf lobe length (cm)

  'White Yograceland' 'White Yoblush'
mean 3.8 3.2
std. deviation 0.39 0.43

Flower head diameter (cm)

  'White Yograceland' 'White Yoblush'
mean 15.6 13.1
std. deviation 0.60 0.51

Ray floret length (cm)

  'White Yograceland' 'White Yoblush'
mean 7.6 6.1
std. deviation 0.33 0.31

Disc diameter (cm)

  'White Yograceland' 'White Yoblush'
mean 5.2 2.4
std. deviation 0.30 0.06
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