Denomination: 'Yoadelle'
Trade name: Adelle
Botanical Name: Chrysanthemum ×morifolium
Applicant/Holder: Syngenta Crop Protection AG
Schwarzwaldallee 215
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
Tel: 519-631-6241
Application Date: 2008-10-02
Application Number: 08-6444
Grant of Rights Date: 2013-04-26
Certificate Number: 4503
Date rights surrendered: 2014-04-17

Variety Description

Variety used for comparison: 'Sylvie Improved'

Summary: The leaf of 'Yoadelle' has diverging margins of the lowest lateral sinus while the leaf of 'Sylvie Improved' has touching to overlapping margins of the lowest lateral sinus. The flower head of 'Yoadelle' is single while the flower head of 'Sylvie Improved' is semi-double. The flower head of 'Yoadelle' is larger in diameter than the flower head of 'Sylvie Improved'. The ray florets of 'Yoadelle' are predominantly spatulate with a long corolla tube while the ray florets of 'Sylvie Improved' are ligulate with an absent to very short corolla tube. The ray floret is longer for 'Yoadelle' than for 'Sylvie Improved'. The disc diameter is larger for 'Yoadelle' than for 'Sylvie Improved'.


PLANT: bushy type, semi-upright growth habit, green stem

PETIOLE: moderately upwards to horizontal attitude, medium to long relative to leaf length
LEAF: terminal lobe long relative to leaf length, lowest lateral sinus medium in depth with diverging margins, base obtuse to truncate, upper side dark green with weak glossiness, margin indentations medium in depth and few in numbers

FLOWER: medium to many flower heads per plant, outer side of bud white (RHS NN155D), single daisy head type
RAY FLORETS: one row, predominantly spatulate type with occasional ligulate types, horizontal attitude of basal part, upper surface with two keels, long corolla tube, corolla tube oblate in profile, straight along longitudinal axis, mamillate tip
RAY FLORET: inner and outer side white (RHS NN155D)
DISC: small to medium in diameter relative to head diameter, slightly domed, yellowish before anther dehiscence with no dark spot at centre, yellow orange at anther dehiscence.

Origin & Breeding History: The variety 'Yoadelle' originated from a controlled pollination conducted in February 2004 in Salinas, California, USA. The female parent was a proprietary seedling designated YB-A0900 and the male parent was a proprietary seedling designated YB-A7015. The new variety was selected in February 2005 in Fort Myers, Florida. The selection criteria included flower form, size and colour, flowering response time, spreading growth habit, strong stems and excellent post production longevity. Asexual reproduction by vegetative tip cuttings was first conducted in Fort Myers, Florida, USA in May 2005.

Tests & Trials: Trials for 'Yoadelle' were conducted in a greenhouse trial during the Fall of 2011 in Niagara-on-the-Lake, Ontario. On August 16, 2011, fifty unrooted cuttings were directly stuck into 11 cm pots, with 5 cuttings per pot. The trial included a total of 10 pots of each variety spaced 30 cm apart. Plants were pinched once prior to short day treatment. Observations and measurements were taken from 10 plants of the candidate variety on November 3, 2011 and the reference variety on November 8, 2011. All colour determinations were made using the 2007 Royal Horticultural Society (RHS) Colour Chart.

Comparison tables for 'Yoadelle' with reference variety 'Sylvie Improved'

Flower head diameter (cm)

  'Yoadelle' 'Sylvie Improved'
mean 3.3 2.6
std. deviation 0.20 0.19

Ray floret length (cm)

  'Yoadelle' 'Sylvie Improved'
mean 1.5 1.1
std. deviation 0.09 0.09

Disc diameter (cm)

  'Yoadelle' 'Sylvie Improved'
mean 1.2 0.9
std. deviation 0.04 0.08

Click on image for larger view
Chrysanthemum: 'Yoadelle' (left) with reference variety 'Sylvie Improved' (right)

Click on image for larger view
Chrysanthemum: 'Yoadelle' (left) with reference variety 'Sylvie Improved' (right)

Click on image for larger view
Chrysanthemum: 'Yoadelle' (left) with reference variety 'Sylvie Improved' (right)

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