44. Volume 15- Number 2 - IP Australia

DESCRIPTIONS
PLANT VARIETIES JOURNAL 2002 VOL 15 NO. 2
PETAL: COLOUR OF MARGINAL ZONE OF OUTER SIDE
(RHS 2001)
61C
63B
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PETAL: SIZE OF SPOT AT BASE OF OUTER SIDE
medium very small
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PETAL: COLOUR OF SPOT AT BASE OF OUTER SIDE
(RHS 2001)
1C
2B
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‘Predepass’
Application No:2001/109 Accepted: 28 May 2001.
Applicant: Preesman Royalty B.V., Naaldwijk, The
Netherlands.
Agent: Grandiflora Nurseries Pty Ltd, Cranbourne, VIC.
Characteristics (Table 33, Figure 2) Plant: cut flower type,
habit bushy, height medium, width medium. Young shoot:
anthocyanin colouration medium, hue of anthocyanin
colouration bronze to reddish brown. Prickles: present,
shape of lower side concave, number of short prickles few,
number of long prickles few. Leaf: size medium, green
colour dark, glossiness of upper side strong. Leaflet: cross
section flat, undulation of margin weak. Terminal leaflet:
length of blade medium (55.3mm – 71.6mm), width of
blade medium (34.8mm – 51.1mm), shape of blade
rounded. Flowering shoot: number of flowers few. Flower
pedicel: number of prickles medium. Flower bud: shape of
longitudinal section ovate. Flower type: double, number of
petals medium (32 – 41), diameter medium (92.1mm –
102.4mm), view from above irregularly rounded, side view
of upper part flattened convex, side view of lower part flat,
fragrance very weak. Sepal: extensions medium. Petal: size
medium, colour of middle zone of inner side dark red darker
than RHS 53B, colour of marginal zone of inner side dark
red darker than RHS 53B, spot at base of inner side present,
size small, colour yellow RHS 11B, colour of middle zone
of outer side dark red darker than RHS 53A, colour of
marginal zone of outer side dark red darker than RHS 53A,
spot at base of outer side present; size small; colour yellow
RHS 13B, reflexing of margin medium, undulation of
margin very weak. Outer stamen: predominant colour of
filament orange. Seed vessel: size large. Hip: shape of
longitudinal section pitcher-shaped. Flowering habit:
almost continuous flowering. (Note: All RHS colour chart
numbers refer to 1995 edition.)
Origin and Breeding Controlled pollination: seed parent
“91-1” x pollen parent “P127” in a planned breeding
program. Both parents are non-commercial breeding stock
plants within the breeding program. Hybridisation took
place in Hoofddorp, The Netherlands in the mid 1990’s.
From this cross, the seedling was chosen on the basis of
flower colour. Selection criteria: bud shape, flower colour
shape size, and stem production. Propagation: a number
mature stock plants were generated from this seedling
through vegetative cuttings and budded onto a rootstock and
were found to be uniform and stable. ‘Predepass’ will be
commercially propagated by vegetative cuttings from the
stock plants. Breeder: Mr TH. A. Segers, Hoofddorp, The
Netherlands.
Choice of Comparators Grouping characteristics used in
identifying the most similar varieties of common
knowledge were – Plant: habit bushy, cut flower type.
Flower: colour dark red, size medium. On the basis of these
grouping characteristics the following comparator varieties
were included in the trial: ‘Korsetag’ and ‘Korazerka’ A syn
Ekstase A . ‘Pekoujenny’ was initially considered but later
rejected due to its larger flower size.
Comparative Trial Location: Clyde, VIC (Latitude 38º09′
South, elevation 16m), winter 2002, measurements taken in
mid Jun. Conditions: trial conducted in a controlled
environment double skinned polyhouse, with a UVB
screening film, specifically formulated for rose production
plants propagated from cutting, rooted cuttings planted into
330mm (3 plants per pot) and 210mm (1 plant per pot) pots
filed with soilless potting mix (scoria), nutrition maintained
as part of a commercial hydroponic system for cut rose
plants, pest and disease treatments applied as required. Trial
design: eight 210mm pots of ‘Predepass’, four 330mm pots
of ‘Korestag’ and over one hundred 330mm pots of
‘Korazerka’ A in single rows on benches with pots touching
each other. Measurements: from twenty plants at random.
One sample per plant.
Prior Applications and Sales
Country Year Current Status Name Applied
EU 1998 Applied ‘Predepass’
Poland 1999 Applied ‘Predepass’
New Zealand 2001 Applied ‘Predepass’
First sold in The Netherlands in Feb 1998. First Australian
sale 2001.
Description: Christopher Prescott, Prescott Roses Pty Ltd, Clyde, VIC.
Table 33 Rosa varieties
‘Predepass’ *‘Korsetag’ *‘Korazerka’ A
syn Ekstase A
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YOUNG SHOOT: ANTHOCYANIN COLOURATION
(1 = absent, 9 = very strong) (shoot about 20cm long)
5 1 9
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YOUNG SHOOT: HUE OF ANTHOCYANIN COLOURATION
(shoot about 20cm long)
bronze to bronze to bronze
reddish brown reddish brown
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PRICKLE: SHAPE OF LOWER SIDE (1 = deep concave, 9 =
high convex)
3 1 3
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LONG PRICKLES: NUMBER (1 = absent, 9 = very many)
3 5 1
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LEAF SIZE (1 = very small, 9 = very large)
7 7 5
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LEAF: GREEN COLOUR (1 = very light, 9 = very dark)
(at time of first flowering)
5 5 7
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