Syngigi Yell


Denomination: 'Syngigi Yell'
Trade name: Gigi 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: 09-6763
Grant of Rights Date: 2012-12-14
Certificate Number: 4443
Date rights surrendered: 2015-12-14

Variety Description

Variety used for comparison: 'Janice'

Summary: The plants of 'Syngigi Yell' are shorter than the plants of 'Janice'. The terminal leaf lobe of 'Syngigi Yell' is medium in length while the terminal leaf lobe of 'Janice' is long. The flower head of 'Syngigi Yell' is smaller in diameter than the flower head of 'Janice'. The profile of the ray floret in cross section is flat to weakly convex for 'Syngigi Yell' while it is moderately concave for 'Janice'. The ray floret of 'Syngigi Yell' is shorter in length than the ray floret of 'Janice'. The outer side of the ray floret is light yellow for 'Syngigi Yell' while it is a slightly darker yellow for 'Janice'.


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

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

INFLORESCENCE: flat corymbiform, many flower heads per plant
BUD: outer side yellow (RHS 12A-B), opening to light yellow (RHS 8B)
FLOWER HEAD: double, low height, dense ray florets, predominately ligulate type ray florets
RAY FLORET: horizontal attitude of basal part, two keels on upper surface, absent to very short corolla tube, flat to weakly convex in cross section at widest part, flat margin, straight along longitudinal axis with weak incurving at distal quarter, ray florets from inner rows with weak incurving along longitudinal axis at distal quarter, emarginate and tri-dentate tip, inner side yellow (RHS 7A) with tones of lighter yellow (RHS 7C) at base, outer side light yellow (RHS 10B) with yellow (RHS 9B) at apex and on margin
DISC: small diameter, medium yellow before anther dehiscence.

Origin & Breeding History: The variety 'Syngigi Yell' originated from a naturally occurring whole plant mutation of the parent variety 'Yogigi Snow'. The variety was discovered by the breeder in November 2008 in Alva, Florida, USA. The new variety was selected based on criteria for flower colour and plant habit.

Tests & Trials: Trials for 'Syngigi Yell' 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 4, 2011. All colour determinations were made using the 2007 Royal Horticultural Society (RHS) Colour Chart.

Comparison tables for 'Syngigi Yell' with reference variety 'Janice'

Plant height (cm)

  'Syngigi Yell' 'Janice'
mean 19.7 28.0
std. deviation 1.33 1.49

Flower head diameter (cm)

  'Syngigi Yell' 'Janice'
mean 3.4 4.5
std. deviation 0.26 0.24

Ray floret length (cm)

  'Syngigi Yell' 'Janice'
mean 1.5 1.9
std. deviation 0.04 0.15

Colour of ray floret (RHS)

  'Syngigi Yell' 'Janice'
outer side 10B with 9B at apex 9B-C

Click on image for larger view
Syngigi Yell
Chrysanthemum: 'Syngigi Yell' (left) with reference variety 'Janice' (right)

Click on image for larger view
Syngigi Yell
Chrysanthemum: 'Syngigi Yell' (left) with reference variety 'Janice' (right)

Click on image for larger view
Syngigi Yell
Chrysanthemum: 'Syngigi Yell' (left) with reference variety 'Janice' (right)

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