Granbur

Gaillardia

Denomination: 'Granbur'
Trade name: Sunburst Burgundy Silk
Botanical Name: Gaillardia aristata
Applicant/Holder: Syngenta Crop Protection AG
Schwarzwaldallee 215
Basel
4058
Switzerland
Breeder: M. Gutter, Enkhuizen, Netherlands
Agent in Canada: BioFlora Inc.
38723 Fingal Line
R.R. #1
St. Thomas, Ontario
N5P 3S5
Canada
Tel: 519-631-6241
Application Date: 2006-10-13
Application Number: 07-6016
Grant of Rights Date: 2009-09-23
Certificate Number: 3615
Date rights surrendered: 2014-09-23

Variety Description

Variety used for comparison: 'Burgundy'

Summary: 'Granbur' has a more compact growth habit and shorter plant height than 'Burgundy'. 'Granbur' has a shorter peduncle length and larger flower diameter than 'Burgundy'. 'Granbur' has absent to very weak anthocyanin colouration on the sepal while 'Burgundy' has strong anthocyanin on the margin of the sepal. The upper side of the ray floret is dark purple red for 'Granbur' while it is red with yellow orange secondary colour at the tips for 'Burgundy'.

Description:

PLANT: bushy-rounded growth habit, dense branching
STEM: medium green, weak anthocyanin colouration, dense pubescence, medium thickness, rounded to slightly ribbed

LEAF: alternate arrangement, simple, oblanceolate, acute apex, attenuate base, margins entire to dentate, very dense pubescence on upper and lower side, medium green on upper and lower side, no variegation, no petiole

PEDUNCLE: very weak to weak anthocyanin colouration, dense pubescence

FLOWER: head type, terminal position, erect attitude
RAY FLORET: fan shaped, entire margin, 2-3 small to medium lobes at apex, dark purple red on upper side, dark purple red on lower side with red pink between veins
DISC: outer florets brown green before anther dehiscence, inner florets yellow before anther dehiscence

Origin & Breeding History: 'Granbur' was bred and developed through inbred breeding of the Gaillardia aristata variety 'Burgundy'. The breeder conducted 3 cycles of half-sib selections of the variety 'Burgundy' made during the period from August 2000 through to July 2002, in Enkhuizen, The Netherlands. The seeds from the selection were sown in January 2003 and a single seedling was selected in July 2003. The selection criteria included compact plant habit, good branching characteristics and early flowering. Asexual reproduction by cuttings was first conducted in August 2003 in Enkhuizen, The Netherlands.

Tests & Trials: Trials for 'Granbur' were conducted during the summer of 2008 in a polyhouse at BioFlora Inc. in St. Thomas, Ontario. There were 15 plants each of the candidate and reference variety. The plants were grown from rooted cuttings which were transplanted into 1 gallon pots on April 17, 2008. Observations and measurements were taken from 10 plants on June 26, 2008. All colour determinations were made using the 2001 Royal Horticulture Society (RHS) Colour Chart.


Comparison tables for 'Granbur' with reference variety 'Burgundy'

Plant height (cm)

  'Granbur' 'Burgundy'
mean 17.9 51.4
std. deviation 4.36 4.16

Peduncle length (cm)

  'Granbur' 'Burgundy'
mean 9.4 17.5
std. deviation 1.07 2.07

Flower diameter (cm)

  'Granbur' 'Burgundy'
mean 8.0 7.1
std. deviation 0.37 0.12

Colour of ray floret (RHS)

  'Granbur' 'Burgundy'
upper side - primary 53B with 53A veins 46B with 46A veins
upper side - secondary N/A 14A at tips
lower side 53A-B, 51C between veins 34D

Click on image for larger view
Granbur
Gaillardia: 'Granbur' (left) with reference variety 'Burgundy' (right)

Click on image for larger view
Granbur
Gaillardia: 'Granbur' (left) with reference variety 'Burgundy' (right)

Click on image for larger view
Granbur
Gaillardia: 'Granbur' (left) with reference variety 'Burgundy' (right)

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