Red Yoauburn


Denomination: 'Red Yoauburn'
Trade name: Red Auburn
Botanical Name: Chrysanthemum
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: 2003-04-07
Application Number: 03-3551
Grant of Rights Date: 2007-11-22
Certificate Number: 3010
Grant of Rights Termination Date: 2025-11-22

Variety Description

Varieties used for comparison: 'Rage' and 'Yoauburn' (Auburn)

Summary: 'Red Yoauburn' has a larger flower head diameter and larger ray floret blade than 'Rage'. The flowers of 'Red Yoauburn' belong to the red colour group while those of 'Yoauburn' belong to the bronze colour group. The flowers of 'Red Yoauburn' are a lighter intensity of red than those of 'Rage'. The upper side of the ray florets of 'Red Yoauburn' is orange brown and brown red combined in a strong checkered pattern while it is red to dark purple red for 'Rage' and yellow orange and orange brown combined in a checkered pattern with a brown red apex for 'Yoauburn'.


PLANT: year round cultivation for pot production, spray flowering type, 8 week response group, medium height
STEM: no anthocyanin colouration

LEAF: medium length, narrow to medium width, broad wedged base
LATERAL LOBE: mostly diverging margins of sinus
LOWER LOBE: medium length, shallow to medium deep sinus

FLOWER HEAD: semi-double, daisy type, chromatic self colour type, red colour group of moderate intensity, medium diameter, no bracts among ray florets
RAY FLORET: short to medium length blade with short corolla tube, straight longitudinal axis of majority, flat to convex in cross-section, notched tip, orange brown and brown red combined in a strong checkered pattern on upper side, yellow green with brown red under colour at apex on lower side
DISC: yellow green before anther dehiscence, yellow after anther dehiscence, medium diameter
DISC FLORET: tubular type, massed in centre of flower head, yellow

Origin & Breeding History: 'Red Yoauburn' is a product from a mutation induction program conducted by the breeder, Mrs. Wendy R. Bergman, an employee of Yoder Brothers, Inc. in Barberton, Ohio, USA. It was created by exposing unrooted cuttings of Chrysanthemum variety 'Yoauburn' to x-ray radiation in July 1999 in Fort Myers, Florida, USA. Following radiation treatment, the cuttings were rooted and the terminal apices removed three times to promote lateral branching. After lateral branches from the third pinch reached sufficient size, terminal cuttings were harvested, planted and flowered. 'Red Yoauburn' was selected in February 2001 based on its uniform plant growth habit, desirable inflorescence form and floret colours, fast response time and excellent post production longevity.

Tests & Trials: Trials for 'Red Yoauburn' were conducted in the fall of 2006 at Yoder Canada Ltd. in Leamington, Ontario. They were performed under greenhouse conditions similar to those used in commercial Chrysanthemum production. 40 unrooted cuttings per variety were directly stuck into 15 cm pots with 4 cuttings per pot and 10 pots per variety. The pots were spaced 30 cm apart. The plants were pinched once prior to short day treatment. All plants had the centre bud removed. Measured characteristics were based on measurements taken from 10 plants or parts of plants on November 1, 2006. All colour determinations were made using the 2001 Royal Horticulture Society (RHS) Colour Chart.

Comparison tables for 'Red Yoauburn' with reference varieties 'Rage' and 'Yoauburn'

Flower head diameter (cm)

  'Red Yoauburn' 'Rage' 'Yoauburn'
mean 8.2 6.2 8.6
std. deviation 0.59 0.34 0.27

Ray floret blade length (cm)

  'Red Yoauburn' 'Rage' 'Yoauburn'
mean 3.1 2.1 3.1
std. deviation 0.17 0.13 0.18

Ray floret blade width(cm)

  'Red Yoauburn' 'Rage' 'Yoauburn'
mean 1.3 0.8 1.1

Ray floret colour (RHS)

  'Red Yoauburn' 'Rage' 'Yoauburn'
upper side 170C & 179A in strong checkered pattern 45A-N34A 13C & 171C in checkered pattern with 179B apex
lower side 1C-D with 182D under colour at apex 1C-D with N34C under colour 11B with faint under colour of 179C in checkered pattern

Click on image for larger view
Red Yoauburn
Chrysanthemum: 'Red Yoauburn' (left) with reference varieties 'Rage' (centre) and 'Yoauburn' (right)

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