Denomination: 'Dekmajor'
Botanical Name: Chrysanthemum ×morifolium
Applicant/Holder: Dekker Breeding B.V.
Julianaweg 6A
1711 RP
Breeder: Cornelis W. Dekker, Dekker Breeding B.V., Hensbroek, Netherlands
Agent in Canada: BioFlora Inc.
38723 Fingal Line
R.R. #1
St. Thomas, Ontario
N5P 3S5
Tel: 519-631-6241
Application Date: 2011-06-07
Application Number: 11-7305
Grant of Rights Date: 2013-06-19
Certificate Number: 4529
Grant of Rights Termination Date: 2031-06-19

Variety Description


PLANT: tall to very tall, non-bushy type, response group when grown under precise daylength control is 4 (7 weeks)
STEM: green
STIPULE: medium to large

PETIOLE: attitude is moderately upwards, medium length relative to leaf length
LEAF: short to medium length including petiole, medium width, medium length/width ratio, terminal lobe is medium to long relative to leaf length, lowest lateral sinus is medium depth, margins of lowest lateral sinus are converging, cordate base, absent or very weak glossiness of upper side, medium green on upper side, attitude is moderately upwards
LEAF MARGIN: few to medium number of indentations, shallow to medium depth indentations

INFLORESCENCE: deeply domed form, narrow at widest point, small angle between primary lateral shoot and stem, upright to semi-upright attitude of lateral flower heads
FLOWER BUD: colour of outer side just before opening is nearest to grayed-yellow (RHS 162D, but slightly paler)
FLOWER HEAD: medium number per stem, semi-double type, medium to large diameter and short to medium height on non-disbudded plants, very few to few rows of ray florets, medium number of ray florets, medium length peduncle
RAY FLORET: ligulate type only, attitude of basal part is moderately ascending to horizontal, ribbed upper surface, short corolla tube, profile in cross-section at widest point is weakly convex, no rolling of margin, longitudinal axis is reflexed, part of longitudinal axis which is not straight extends from distal quarter to distal half, weak to medium strength curvature along londitudinal axis, medium length, medium to broad, low to medium length/width ratio, mamillate tip, one coloured on inner side, main colour on inner side is white (RHS NN155C), colour of outer and inner sides is similar
DISC: daisy type, medium to large diameter, medium diameter relative to head diameter, slightly domed profile in cross-section, green before anther dehiscence, no dark spot at centre before anther dehiscence, yellowish green at anther dehiscence

Origin & Breeding History: 'Dekmajor' was bred and developed as part of a planned breeding program by the breeder, Cornelius W. Dekker, in Hensbroek, Netherlands. It originated from a hybrid cross conducted in February 2007 between the female parent, proprietary seeding number '40693', and the male parent, proprietary seedling number '05.47071.02'. 'Dekmajor' was selected from the resultant progeny in October 2007 based on its numerous flower heads, large flower size and white flower colour.

Tests & Trials: The detailed description of 'Dekmajor' is based on the UPOV report of Technical Examination, application number 2010/0381, purchased from the Community Plant Variety Office, Angers, France. The trials were conducted by the National Institute of Agricultural Botany in Cambridge, United Kingdom, in 2010. Colour determinations were made using the 2007 Royal Horticultural Society (RHS) Colour Chart.

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Chrysanthemum: 'Dekmajor'

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