Denomination: 'Yobaldwin'
Trade name: Baldwin
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: 2005-04-05
Application Number: 05-4685
Grant of Rights Date: 2008-11-24
Certificate Number: 3409
Date rights surrendered: 2014-10-03

Variety Description

Variety used for comparison: 'Yoplymouth' (Plymouth)

Summary: 'Yobaldwin' has a shorter plant and larger disc diameter than 'Yoplymouth'. The flower head of 'Yobaldwin' is a single anemone type while that of 'Yoplymouth' is a semi-double daisy. 'Yobaldwin' has fewer ray florets per flower head than 'Yoplymouth'. The ray florets of 'Yobaldwin' are longer with a longer corolla tube than those of 'Yoplymouth'. The upper side of the ray floret of 'Yobaldwin' is lighter purple than that of 'Yoplymouth'. 'Yobaldwin' has funnel shaped disc florets while those of 'Yoplymouth' are enlarged tubular. At anther dehiscence, the disc of 'Yobaldwin' is violet with a purple inner surface and yellow margin while that of 'Yoplymouth' is yellow orange.


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

LEAF: medium green, 1.8:1 length/width ratio, acute to obtuse base, diverging margins of sinus between lateral lobes

INFLORESCENCE: flat corymbiform
FLOWER HEAD: single anemone type, self-coloured, medium to dark purple colour group, sparse to moderately dense ray florets
RAY FLORET: spatulate to almost quilled, longitudinal axis of majority is straight, concave in cross-section, spatulate end, mamillate tip, purple with darker purple over-colour on upper side, mottled colour pattern on upper side, lower side is violet with darker violet mottled under-colour
DISC: medium yellow before anther dehiscence, violet with purple inner surface and yellow margin at anther dehiscence
DISC FLORET: funnel shaped

Origin & Breeding History: 'Yobaldwin' is a product of a planned breeding program conducted by the breeder, Mrs. Wendy R. Bergman, an employee of Yoder Brothers, Inc. in Barberton, Ohio, USA. It originated from a cross between proprietary Chrysanthemum seedling selection designated 'YB-A2427' as the female parent and another proprietary Chrysanthemum seedling selection designated 'YB-A2333' as the male parent. This cross was conducted by the breeder in April 2000, in Salinas, California, USA. 'Yobaldwin' was discovered and selected in March 2001, as a single flowering plant among the progeny of the stated cross growing in a controlled environment in Fort Myers, Florida, USA. The selection of this plant was based on its uniform plant growth habit, desirable inflorescence form and floret colours, fast response time and excellent post-production longevity. Asexual reproduction of 'Yobaldwin' by vegetative tip cuttings was first conducted in Fort Myers, Florida, USA in June 2001.

Tests & Trials: Trials for 'Yobaldwin' were conducted in the fall of 2007 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 central bud removed. Observations and measurements were taken from 10 plants of each variety on October 29, 2007. All colour determinations were made using the 2001 Royal Horticulture Society (RHS) Colour Chart.

Comparison tables for 'Yobaldwin' with reference variety 'Yoplymouth'

Plant height (cm)

  'Yobaldwin' 'Yoplymouth'
mean 23.5 27.9
std. deviation 1.27 2.42

Ray floret length (cm)

  'Yobaldwin' 'Yoplymouth'
mean 3.4 2.9
std. deviation 0.20 0.16

Length of ray floret corolla tube (cm)

  'Yobaldwin' 'Yoplymouth'
mean 2.5 1.9
std. deviation 0.30 0.21

Colour of upper side of ray floret (RHS)

  'Yobaldwin' 'Yoplymouth'
main / background 70B 60C
secondary / over-colour 64A 60B

Disc diameter (cm)

  'Yobaldwin' 'Yoplymouth'
mean 3.0 1.3
std. deviation 0.18 0.08

Colour of disc (RHS)

  'Yobaldwin' 'Yoplymouth'
at anther dehiscence 75A outer surface, 64B inner surface, 12B margin yellow orange

Click on image for larger view
Chrysanthemum: 'Yobaldwin' (left) with reference variety 'Yoplymouth' (right)

Click on image for larger view
Chrysanthemum: 'Yobaldwin' (left) with reference variety 'Yoplymouth' (right)

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