SAXZ0004

Saxifrage

Denomination: 'SAXZ0004'
Trade name: Touran White
Botanical Name: Saxifraga ×arendsii
Applicant/Holder: Syngenta Participations AG
Schwarzwaldallee 215
4058
Basel
Switzerland
Breeder: Henricus G.W. Stemkens, Syngenta Seeds B.V., 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: 2012-02-06
Application Number: 12-7494
Grant of Rights Date: 2015-06-30
Certificate Number: 5057
Grant of Rights Termination Date: 2035-06-30

Variety Description

Varieties used for comparison: 'Rocklarwhi' (Touran Large White) and 'Highlander White'

Summary: When measured to the top of open flowers, the plants of 'SAXZ0004' are taller than the plants of both reference varieties. The leaf blade of 'SAXZ0004' is smaller than the leaf blade of 'Rocklarwhi'. The leaf blade of 'SAXZ0004' has anthocyanin colouration whereas the leaf blade of 'Highlander White' does not. The plants of 'SAXZ0004' flower later than the plants of 'Rocklarwhi'. The colour on the outer side of the unopened flower bud of 'SAXZ0004' is light yellow with dark purple red along the mid-vein and at the apex of the petals whereas the flower bud of 'Rocklarwhi' is yellowish white, and the flower bud of 'Highlander White' is light yellow with dark purple red occasionally on the tip of a petal. The flower of 'SAXZ0004' is smaller in diameter with a narrower petal width than the flower of 'Rocklarwhi'. Before anther dehiscence, the colour of the style of 'SAXZ0004' is white-yellow while the style of 'Highlander White' is green.

Description:

PLANT: erect growth habit, dense foliage, medium density of flowers, late flowering

LEAF BLADE: alternate arrangement, simple type, obovate shape, lobed margin, medium to dark green on upper side, weak intensity of anthocyanin colouration on tips of lobes
PETIOLE: present

FLOWERING STEM: light green, medium to strong intensity of anthocyanin colouration at distal end towards flower
INFLORESCENCE: cymose panicle type
FLOWER BUD: light yellow (whiter than RHS 4D) with dark purple red (RHS 53A-B) mid-vein and at apex of petals
FLOWER: at all stages of development from newly open to mature, inner side is white (RHS NN155C) with light greenish veins and brown purple (RHS 186B) tones at apex of petals
PETAL: ranging from five to six per flower, elliptic shape, rounded apex, absent or very weak undulation of margin, medium reflexing along longitudinal axis of margin
STAMEN: anther is yellow before and after dehiscence, filament is light green
STYLE: white-yellow before anther dehiscence

Origin & Breeding History: 'SAXZ0004' was developed as part of a controlled breeding program by the breeder, Henricus Godefridus Wilhelmus Stemkens, in Enkhuizen, Netherlands. It originated from a cross conducted in April 2005 between the proprietary line 'H1059-51' as the female parent and an unknown proprietary line as the male parent. The resultant seed was sown in a greenhouse in August 2005. In March 2006, a single plant from the progeny was selected for its flower colour and plant growth habit and later named 'SAXZ0004'.

Tests & Trials: The comparative trial of 'SAXZ0004' was conducted in a polyhouse during the spring of 2014 at BioFlora Inc. in St. Thomas, Ontario. The trial included 20 plants each of the candidate and reference varieties. All plants were grown from rooted cuttings and transplanted into 11.4 cm pots on August 15, 2013. Observations and measurements were taken from 10 plants or parts of plants of the candidate and reference variety 'Highlander White' on March 13, 2014, and from 10 plants or parts of plants of the reference variety 'Rocklarwhi' on February 13, 2014. All colour determinations were made using the 2007 Royal Horticultural Society (RHS) Colour Chart.


Comparison tables for 'SAXZ0004' with reference varieties 'Rocklarwhi' and 'Highlander White'

Plant height to top of open flowers (cm)

  'SAXZ0004' 'Rocklarwhi' 'Highlander White'
mean 12.4 7.3 8.2
std. deviation 1.34 0.78 1.21

Leaf blade length (mm)

  'SAXZ0004' 'Rocklarwhi' 'Highlander White'
mean 12.1 21.6 13.3
std. deviation 1.60 2.37 1.25

Leaf blade width (mm)

  'SAXZ0004' 'Rocklarwhi' 'Highlander White'
mean 7.8 15.0 7.1
std. deviation 1.55 1.49 1.73

Colour of flower bud (RHS)

  'SAXZ0004' 'Rocklarwhi' 'Highlander White'
outer side whiter than 4D with 53A-B along mid-vein and at apex of petals NN155B whiter than 4D with closest to 60B occasionally on petal tips

Flower diameter (mm)

  'SAXZ0004' 'Rocklarwhi' 'Highlander White'
mean 20.5 22.6 17.0
std. deviation 0.71 1.26 1.56

Petal width (mm)

  'SAXZ0004' 'Rocklarwhi' 'Highlander White'
mean 9.0 11.0 8.2
std. deviation 0.94 1.05 0.79

Click on image for larger view
SAXZ0004
Saxifrage: 'SAXZ0004' (left) with reference varieties 'Rocklarwhi' (centre) and 'Highlander White' (right)

Click on image for larger view
SAXZ0004
Saxifrage: 'SAXZ0004' (left) with reference varieties 'Rocklarwhi' (centre) and 'Highlander White' (right)

Click on image for larger view
SAXZ0004
Saxifrage: 'SAXZ0004' (left) with reference varieties 'Rocklarwhi' (centre) and 'Highlander White' (right)

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