Orange Yoroanoke


Denomination: 'Orange Yoroanoke'
Trade name: Orange Roanoke
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: 2006-03-31
Application Number: 06-5401
Grant of Rights Date: 2010-03-19
Certificate Number: 3816
Date rights surrendered: 2014-02-24

Variety Description

Variety used for comparison: 'Orange Davis'

Summary: The leaves and terminal leaf lobes of 'Orange Yoroanoke' are shorter than those of 'Orange Davis'. 'Orange Yoroanoke' has ray florets with a reflexing longitudinal axis of majority while for 'Orange Davis' they are straight. The secondary and tertiary colours on the upper side of the ray florets of 'Orange Yoroanoke' are lighter than those of 'Orange Davis'. 'Orange Yoroanoke' has emarginate and mamillate tipped ray florets with diffuse stripes and flecks of overlay colour on the upper side while 'Orange Davis' has ray florets with obtuse to acute tips and mottled overlay colour.


PLANT: year round cultivation for pot production, pinched type, spray flowering type, 8 week response group
STEM: green

LEAF: obtuse base, mostly diverging margins of sinus between lateral lobes, medium green

INFLORESCENCE: corymbiform
FLOWER HEAD: semi-double daisy type, chromatic self colour, orange colour group, medium intensity of colour, medium density of ray florets
RAY FLORET: ligulate, reflexing longitudinal axis of majority, weak strength of curvature, flat and convex in cross section, emarginate and mamillate tips, orange brown (RHS 170A-B) with diffuse stripes and flecks on upper side when newly opened, red at apex and margins on upper side when newly and fully opened, light yellow brown (RHS 163C) fading to light yellow (RHS 10B-C) with diffuse stripes and flecks of orange brown on upper side when fully opened, light yellow (RHS 10C) with red tones on lower side when newly opened, light yellow (RHS 10C) with light red pink (RHS 35D) on lower side when fully opened
DISC: yellow-green before anther dehiscence, medium yellow at anther dehiscence
DISC FLORETS: enlarged tubular, massed in the center

Origin & Breeding History: 'Orange Yoroanoke' originated from a naturally occurring whole plant mutation of the parent variety 'Yoroanoke' discovered and developed by the breeder, Mrs. Wendy Bergman, in December 2000 in Fort Myers, Florida, United States. 'Orange Yoroanoke' was selected based on plant growth habit, inflorescence form, floret and foliage colour, response time and suitability for production. Asexual reproduction of the variety by vegetative tip cuttings was first conducted in Fort Myers, Florida, United States in March 2001.

Tests & Trials: Trials for 'Orange Yoroanoke' were conducted in Leamington, Ontario, in the fall of 2008. Flowering trials were performed under greenhouse conditions similar to those used in commercial chrysanthemum production. Forty unrooted cuttings of both the candidate and reference varieties were directly stuck into 15 cm pots, with 4 cuttings per pot, 10 pots per variety, planted on August 25, 2008. Plants were spaced 30 cm apart and pinched once prior to short day treatment. All plants had the center bud removed. Observations and measurements were taken from 10 plants of each variety on November 3, 2008. All colour determinations were made using the 2001 Royal Horticultural Society (RHS) Colour Chart.

Comparison tables for 'Orange Yoroanoke' with reference variety 'Orange Davis'

Leaf length (cm)

  'Orange Yoroanoke' 'Orange Davis'
mean 7.2 10.1
std. deviation 0.21 0.67

Terminal leaf lobe length (cm)

  'Orange Yoroanoke' 'Orange Davis'
mean 2.8 3.5
std. deviation 0.39 0.51

Colour of upper side of ray florets (RHS)

  'Orange Yoroanoke' 'Orange Davis'
secondary - newly opened medium overlay of 169A-B strong overlay of 169A
tertiary - newly and fully opened 42B at apex and margins 179A at margins and base
secondary - fully opened weak to medium overlay of 170B-C medium overlay of 168A

Click on image for larger view
Orange Yoroanoke
Chrysanthemum: 'Orange Yoroanoke' (left) with reference variety 'Orange Davis' (right)

Click on image for larger view
Orange Yoroanoke
Chrysanthemum: 'Orange Yoroanoke' (left) with reference variety 'Orange Davis' (right)

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