Golia Dbyel


Denomination: 'Golia Dbyel'
Trade name: Goldalia Yellow
Botanical Name: Dahlia
Applicant/Holder: Syngenta Crop Protection AG
Schwarzwaldallee 215
Breeder: Pim Kaagman, Goldsmith Seeds Europe B.V., Andijk, Netherlands
Agent in Canada: BioFlora Inc.
38723 Fingal Line
R.R. #1
St. Thomas, Ontario
N5P 3S5
Tel: 519-631-6241
Application Date: 2009-01-30
Application Number: 09-6486
Grant of Rights Date: 2011-08-19
Certificate Number: 4121
Date rights surrendered: 2014-07-11

Variety Description

Variety used for comparison: 'Margaret Improved' (Dahlietta Margaret)

Summary: The peduncle of 'Golia Dbyel' is longer than the peduncle of 'Margaret Improved'. The flower of 'Golia Dbyel' is single while the flower of 'Margaret Improved' is a daisy eyed double. The flower head of 'Golia Dbyel' has collar segments present while the flower head of 'Margaret Improved' has no collar segments. The ray floret of 'Golia Dbyel' has a dentate apex while the ray floret of 'Margaret Improved' has a pointed apex.


PLANT: upright growth habit, green stem

LEAF: predominantly simple, absent or very weak leaf wing, medium length to width ratio, medium green, weak glossiness, smooth or very weakly rugose texture, veins flat
LEAFLET: elliptic and broad ovate shape, acute base, few to medium number of incisions on margin, incisions medium in depth


FLOWER: at same level in relation to foliage, semi-upright to horizontal attitude, single, daisy type, collar segments present, collar segments three quarters the length of ray florets, few ray florets
RAY FLORETS: medium length to width ratio, two keels on upper surface, moderately to weakly concave in cross section at mid point, weakly concave changing to convex at three quarters point with age, no rolling of margin, longitudinal axis weakly incurving to straight, weak curvature at distal half, absent or very weak twisting, apex dentate, inner side yellow green (RHS 1B), outer side yellow green (RHS 1C)
DISC: small to medium diameter relative to flower head, yellow-orange before and at anther dehiscence, collar segments yellow green (RHS 1C).

Origin & Breeding History: The dahlia variety 'Golia Dbyel' originated from a cross made in August 2006 in Andijk, The Netherlands. The female parent was a proprietary line designated D05-115-4 and the male parent was a proprietary line designated D05-115-5. The resultant seed was sown in a greenhouse in November 2006. In February 2007, a single plant from the progeny was selected based on flower colour, plant habit and production characteristics.

Tests & Trials: Trials for 'Golia Dbyel' were conducted in a polyhouse during the spring of 2010 at BioFlora Inc. in St. Thomas, Ontario. The trial included a total of fifteen plants of the candidate and reference varieties. All plants were grown from rooted cuttings and transplanted into 11 cm pots on May 18, 2010. Observations and measurements were taken from ten plants or parts of plants on June 16, 2010. All colour determinations were made using the 2007 Royal Horticultural Society (RHS) Colour Chart.

Comparison table for 'Golia Dbyel' with reference variety 'Margaret Improved'

Peduncle length (cm)

  'Golia Dbyel' 'Margaret Improved'
mean 6.9 5.4
std. deviation 0.68 0.61

Click on image for larger view
Golia Dbyel
Dahlia: 'Golia Dbyel' (left) with reference variety 'Margaret Improved' (right)

Click on image for larger view
Golia Dbyel
Dahlia: 'Golia Dbyel' (left) with reference variety 'Margaret Improved' (right)

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