Dala Triwhi

Diascia

Denomination: 'Dala Triwhi'
Trade name: Darla White '11
Botanical Name: Diascia barberae
Applicant/Holder: Syngenta Crop Protection AG
Schwarzwaldallee 215
Basel
4058
Switzerland
Breeder: Eric Giesen, Syngenta Seeds B.V., Andijk, Netherlands
Agent in Canada: BioFlora Inc.
38723 Fingal Line
R.R. #1
St. Thomas, Ontario
N5P 3S5
Canada
Tel: 519-631-6241
Application Date: 2010-02-18
Application Number: 10-6847
Grant of Rights Date: 2012-06-22
Certificate Number: 4327
Date rights surrendered: 2014-06-22

Variety Description

Varieties used for comparison: 'Balwinwite' (Romeo White) and 'Baljulite' (Juliet White)

Summary: The leaf of 'Dala Triwhi' is shorter than the leaf of the reference varieties. The leaf blade of 'Dala Triwhi' is dark green while the leaf blade of 'Balwinwite' is light to medium green. The pedicel of 'Dala Triwhi' is shorter than the pedicel of 'Balwinwite'. The corolla window is medium yellow for 'Dala Triwhi' while it is light yellow for 'Baljulite'. The spur of 'Dala Triwhi' has a light yellow tip while the spur of 'Balwinwhite' has an orange brown tip and the spur of 'Baljulite' has a white tip. The spur tip is pointing downwards for 'Dala Triwhi' while the spur tip of 'Balwinwhite' is pointing outwards.

Description:

PLANT: upright growth habit, medium to dense
STEM: no anthocyanin colouration

LEAF BLADE: obtuse apex, cordate base, strong glossiness, no variegation, dark green on upper side

INFLORESCENCE: sparse to medium density
PEDICEL: small angle relative to peduncle, absent or very weak anthocyanin colouration
COROLLA: white (RHS NN155C) on upper side
LATERAL COROLLA LOBES: absent or weak reflexing
LOWER COROLLA LOBE: broader than long, absent or weak incurving, absent or very weak undulation of margin
TRICHOMAL ELAIOPHORES: present, sparse
COROLLA WINDOW: medium yellow
SPUR: medium length, white (RHS NN155D) with light yellow (4D) tips, absent or weak curvature, tip pointing downwards.

Origin & Breeding History: The variety 'Dala Triwhi' originated from a cross made in June 2005 in Andijk, the Netherlands. The female parent was an white flowered proprietary seedling, designated DS05-95-1 and the male parent was a white flowered proprietary seedling, designated DS03-112-3. The resultant seed was sown in a greenhouse in October 2005 in Andijk. In January 2006, a single plant was selected from the progeny, based on criteria for pure white flower colour, improved plant habit and tolerance to heat in outdoor trials.

Tests & Trials: Trials for 'Dala Triwhi' were conducted in a polyhouse during the spring of 2011 in St. Thomas, Ontario. The trial included a total of 15 plants each of the candidate and reference variety. All plants were grown from rooted cuttings and transplanted into 11 cm pots on April 19, 2011. Observations and measurements were taken from 10 plants of each variety on May 24, 2011. All colour determinations were made using the 2007 Royal Horticultural Society (RHS) Colour Chart.


Comparison tables for 'Dala Triwhi' with reference varieties 'Balwinwite' and 'Baljulite'

Leaf length (cm)

  'Dala Triwhi' 'Balwinwite' 'Baljulite'
mean 2.2 2.6 2.7
std. deviation 0.21 0.31 0.20

Pedicel length (cm)

  'Dala Triwhi' 'Balwinwite' 'Baljulite'
mean 1.3 2.3 1.6
std. deviation 0.12 0.25 0.34

Colour of spur (RHS)

  'Dala Triwhi' 'Balwinwite' 'Baljulite'
tip 4D N170D N155B

Click on image for larger view
Dala Triwhi
Diascia: 'Dala Triwhi' (left) with reference variety 'Balwinwite' (centre) and 'Baljulite' (right)

Click on image for larger view
Dala Triwhi
Diascia: 'Dala Triwhi' (left) with reference variety 'Balwinwite' (centre) and 'Baljulite' (right)

Click on image for larger view
Dala Triwhi
Diascia: 'Dala Triwhi' (left) with reference variety 'Balwinwite' (centre) and 'Baljulite' (right)

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