Symild Yel


Denomination: 'Symild Yel'
Trade name: Mildred 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: 2010-04-09
Application Number: 10-6933
Grant of Rights Date: 2012-12-14
Certificate Number: 4442
Date rights surrendered: 2014-10-03

Variety Description

Variety used for comparison: 'Sunny Yobrigitte'

Summary: The plant of 'Symild Yel' is wider than the plant of 'Sunny Yobrigitte'. The leaf of 'Symild Yel' is longer than the leaf of 'Sunny Yobrigitte'. The flower head of 'Symild Yel' is larger in diameter than the flower head of 'Sunny Yobrigitte'. The outer side of the ray floret is white for 'Symild Yel' while it is yellow green with yellow at the tip for 'Sunny Yobrigitte'.


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

LEAF: moderately upwards attitude of petiole, terminal lobe long relative to leaf length, lowest lateral lobe of sinus medium in depth with mostly diverging margins, acute base, absent or weak glossiness on upper side, medium green on upper side, margin indentations few in number and shallow to medium in depth

INFLORESCENCE: many flower heads per plant
BUD: outer side light yellow (RHS 8B), opening to yellow green (RHS 2D)
FLOWER HEAD: double, medium height, dense ray florets, predominately ligulate type ray florets, some inner florets almost incurved type
RAY FLORET: weakly ascending attitude of basal part, two weak keels on upper surface, absent to very short corolla tube, flat in cross section at widest part, flat margin, straight along longitudinal axis, ray florets from inner rows with weak incurving along longitudinal axis at distal quarter, emarginate, tri-dentate and mamillate tip, inner side yellow to yellow green (RHS 4B-C) with darker yellow (RHS 4A) at tip, outer side white (RHS 155A), inner side of ray floret from inner rows yellow (RHS 5C) with darker yellow (RHS 5A) at tip, outer side yellow green (RHS 2D) with white (RHS 155A).

Origin & Breeding History: The variety 'Symild Yel' originated from a naturally occurring whole plant mutation of the parent variety 'Yomildred'. The variety was discovered by the breeder on December 1, 2008, in Alva, Florida, USA. The new variety was selected based on criteria for flower colour, flower size, response time and plant habit.

Tests & Trials: Trials for 'Symild Yel' were conducted in an outdoor irrigated trial during the summer of 2011 in St. Thomas, Ontario. The trial included a total of 15 plants each of the candidate and reference varieties. All plants were grown from rooted cuttings and transplanted into 20 cm pots on June 23, 2011. Observations and measurements were taken from 10 plants of each variety on October 10, 2011. All colour determinations were made using the 2007 Royal Horticultural Society (RHS) Colour Chart.

Comparison tables for 'Symild Yel' with reference variety 'Sunny Yobrigitte'

Plant width (cm)

  'Symild Yel' 'Sunny Yobrigitte'
mean 60.8 49.9
std. deviation 1.03 3.25

Leaf length (cm)

  'Symild Yel' 'Sunny Yobrigitte'
mean 7.0 5.3
std. deviation 0.44 0.40

Flower head diameter (cm)

  'Symild Yel' 'Sunny Yobrigitte'
mean 5.8 4.6
std. deviation 0.49 0.23

Colour of flower bud (RHS)

  'Symild Yel' 'Sunny Yobrigitte'
outer side 8B 4C-B

Colour of ray floret (RHS)

  'Symild Yel' 'Sunny Yobrigitte'
outer side 155A 4C with 5C at tip

Click on image for larger view
Symild Yel
Chrysanthemum: 'Symild Yel' (left) with reference variety 'Sunny Yobrigitte' (right)

Click on image for larger view
Symild Yel
Chrysanthemum: 'Symild Yel' (left) with reference variety 'Sunny Yobrigitte' (right)

Click on image for larger view
Symild Yel
Chrysanthemum: 'Symild Yel' (left) with reference variety 'Sunny Yobrigitte' (right)

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