Currant Yoirvine

Chrysanthemum

Denomination: 'Currant Yoirvine'
Trade name: Currant Irvine
Botanical Name: Chrysanthemum ×morifolium
Applicant/Holder: Syngenta Crop Protection AG
Schwarzwaldallee 215
Basel
4058
Switzerland
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
Canada
Tel: 519-631-6241
Application Date: 2007-06-28
Application Number: 07-5937
Grant of Rights Date: 2011-03-17
Certificate Number: 4015
Date rights surrendered: 2015-01-22

Variety Description

Variety used for comparison: 'Raspberry Yolompoc' (Raspberry Lompoc)

Summary: 'Currant Yoirvine' has a medium depth of the lowest lateral leaf lobe sinus while 'Raspberry Yolompoc' has a deep sinus. 'Currant Yorivine' has a larger flower head diameter and longer ray floret length than 'Raspberry Yolompoc'. The ray floret of 'Currant Yorivine' has a horizontal attitude at the basal part while the ray floret of 'Raspberry Yolompoc' has a moderately ascending attitude. The longitudinal axis of the ray floret is reflexing for 'Currant Yoirvine' while it is weakly incurving for 'Raspberry Yolompoc'. The inner side of the ray floret is purple red for 'Currant Yoirvine' while it is purple for 'Raspberry Yolompoc'.

Description:

PLANT: spray flowering type, pot plant, 8 week response group, semi upright bushy growth habit, green stem

LEAF: short petiole relative to leaf length, terminal lobe medium in length relative to leaf length, lowest lateral sinus medium in depth with diverging margins, base rounded, upper side medium to dark green

FLOWER HEAD: semi-double daisy type, medium density of ray florets
RAY FLORETS: ligulate, very short corolla tube, horizontal attitude at basal part, flat to weakly concave in cross section at widest point, reflexing longitudinal axis, rounded to weakly dentate tip, inner side purple red (RHS 63A) with light brown (RHS N170C) secondary colour, secondary colour distributed throughout in a mottled pattern, outer side light yellow brown (RHS 161C) with mottled streaks of red pink (RHS 51C) and brown purple (RHS 185D)
DISC: small diameter relative to head diameter, yellow green before anther dehiscence, no dark spot present at centre before dehiscence, light yellow at anther dehiscence, stigma yellow (RHS 12A)
DIST FLORETS: enlarged tubular, purple (RHS 60C) petaloid may be present as floret ages.

Origin & Breeding History: 'Currant Yoirvine' originated from a naturally occurring whole plant mutation of the parent variety 'Yoirvine' discovered and developed by the breeder, Mrs. Wendy Bergman, in December 2003 in Fort Myers, Florida, USA. 'Currant Yorivine' was selected in March 2004, based on its strong and spreading growth habit, dark and glossy foliage colour, flower form, flower colour, response time and good winter performance. Asexual reproduction of the variety by vegetative tip cuttings was first conducted in Fort Myers, Florida, USA in March 2004.

Tests & Trials: Trials for 'Currant Yoirvine' were conducted in Leamington, Ontario, in the fall of 2009. Flowering trials were performed under greenhouse conditions similar to those used in commercial chrysanthemum production. Forty unrooted cuttings of both the candidate and reference variety were directly stuck into 15 cm pots, with 4 cuttings per pot, 10 pots per variety, planted on August 24, 2009. 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 6, 2009. All colour determinations were made using the 2007 Royal Horticultural Society (RHS) Colour Chart.


Comparison tables for 'Currant Yoirvine' with reference variety 'Raspberry Yolompoc'

Flower head diameter (cm)

  'Currant Yoirvine' 'Raspberry Yolompoc'
mean 9.7 7.1
std. deviation 0.48 0.42

Length of ray floret (cm)

  'Currant Yoirvine' 'Raspberry Yolompoc'
mean 4.5 3.4
std. deviation 0.22 0.20

Colour of ray floret (RHS)

  'Currant Yoirvine' 'Raspberry Yolompoc'
inner side - main 63A 61B
inner side - secondary N170C 186B
outer side 161C with 51C and 185D N170D with 185D

Click on image for larger view
Currant Yoirvine
Chrysanthemum: 'Currant Yoirvine' (left) with reference variety 'Raspberry Yolompoc' (right)

Click on image for larger view
Currant Yoirvine
Chrysanthemum: 'Currant Yoirvine' (left) with reference variety 'Raspberry Yolompoc' (right)

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