Synwil Yel


Denomination: 'Synwil Yel'
Trade name: Wilma Yellow
Botanical Name: Chrysanthemum ×morifolium
Applicant/Holder: Syngenta Crop Protection AG
Schwarzwaldallee 215
Breeder: Mark Smith, Syngenta Flowers, Inc., Gilroy, 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: 2009-10-30
Application Number: 09-6772
Grant of Rights Date: 2011-12-05
Certificate Number: 4235
Grant of Rights Termination Date: 2029-12-05

Variety Description

Variety used for comparison: 'Yoerica' (Erica)

Summary: The plants of 'Synwil Yel' are shorter and narrower than the plants of 'Yoerica'. The leaf of 'Synwil Yel' is shorter in length than the leaf of 'Yoerica'. The length of the terminal leaf lobe relative to the leaf length is short to medium for 'Synwil Yel' while it is long for 'Yoerica'. The lowest lateral sinus on the leaf of 'Synwil Yel' is shallow while the lowest lateral leaf sinus of 'Yoerica' is medium in depth. The flower head of 'Synwil Yel' is smaller in diameter than the flower head of 'Yoerica'.


PLANT: bushy, semi-upright growth habit, dense branching, green stem

LEAF: moderately upwards attitude of petiole, short to medium length terminal lobe relative to leaf length, acute to obtuse base, upper side medium to dark green with absent or very weak glossiness
LOWEST LATERAL SINUS: shallow, diverging margins

INFLORESCENCE: many flower heads per plant
RAY FLORETS: ligulate type, moderately ascending attitude of basal part, upper surface with two keels, very short to short corolla tube, flat to weakly convex in cross section at widest point, flat to weakly revolute margin, revolute part at distal half, straight at longitudinal axis with weak reflexing at distal quarter, ray florets at inner row with weak incurving along longitudinal axis, incurving at distal quarter, dentate tip, inner side yellow (RHS 2A-B), outer side yellow green (RHS 2C).

Origin & Breeding History: The variety 'Synwil Yel' originated from a naturally occurring whole plant mutation of the parent variety 'Wilma'. The variety was discovered and selected by the breeder in November 2006 in Alva, Florida, USA. Selection was based on criteria for flower colour and plant habit.

Tests & Trials: Trials for 'Synwil Yel' were conducted in an outdoor irrigated trial during the summer of 2010 in St. Thomas, Ontario. The trial included a total of 15 plants of each variety. All plants were grown from rooted cuttings and transplanted into 20 cm pots on June 29, 2010. Observations and measurements were taken from 10 plants of each variety on September 29, 2010. All colour determinations were made using the 2007 Royal Horticultural Society (RHS) Colour Chart.

Comparison tables for 'Synwil Yel' with reference variety 'Yoerica'

Plant height (cm)

  'Synwil Yel' 'Yoerica'
mean 24.0 29.8
std. deviation 1.12 1.20

Plant width (cm)

  'Synwil Yel' 'Yoerica'
mean 37.3 55.0
std. deviation 2.63 4.13

Leaf length (cm)

  'Synwil Yel' 'Yoerica'
mean 3.6 4.3
std. deviation 0.43 0.31

Flower head diameter (cm)

  'Synwil Yel' 'Yoerica'
mean 4.8 5.4
std. deviation 0.24 0.14

Click on image for larger view
Synwil Yel
Chrysanthemum: 'Synwil Yel' (left) with reference variety 'Yoerica' (right)

Click on image for larger view
Synwil Yel
Chrysanthemum: 'Synwil Yel' (left) with reference variety 'Yoerica' (right)

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