Silte Rossa


Denomination: 'Silte Rossa'
Trade name: Silhouette Rose
Botanical Name: Impatiens walleriana
Applicant/Holder: Syngenta Crop Protection AG
Schwarzwaldallee 215
Breeder: Johanna Jonkers, 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: 2005-10-17
Application Number: 05-5115
Grant of Rights Date: 2010-01-11
Certificate Number: 3721
Date rights surrendered: 2014-01-11

Variety Description

Variety used for comparison: 'Balolerose' (Fiesta Ole Rose)

Summary: The plants of 'Silte Rossa' are wider than those of 'Balolerose'. 'Silte Rossa' has smaller leaves than 'Balolerose'. The flowers of 'Silte Rossa' are one coloured while those of 'Balolerose' are two coloured. 'Silte Rossa' has weak degree of curvature of the flower spur while 'Balolerose' has medium degree of curvature.


PLANT: short, medium to wide, weak anthocyanin colouration on upper third of shoot

LEAF: very short, very narrow to narrow, no variegation, medium green on upper side, absent or very weak anthocyanin colouration on upper side with very weak to weak at the base of the midrib, red and green between veins on the lower side, very weak intensity of red colouration between veins on lower side, weak anthocyanin colouration on midrib of lower side, very weak anthocyanin colouration on veins of lower side
PETIOLE: very weak anthocyanin colouration on upper side, very short to short

FLOWER: double, medium diameter, one coloured, purple red (RHS N57A-B) on upper side of petal, red pink (RHS 52C) on lower side of petal, no eye zone, short to medium pedicel, weak anthocyanin colouration on pedicel
SPUR: weak anthocyanin colouration at base to strong at tip, weak degree of curvature

Origin & Breeding History: 'Silte Rossa' originated from a cross conducted by the breeder J. Hanneke Jonkers, an employee of Goldsmith Seeds Europe, The Netherlands, as part of a planned pedigree breeding program in 2003. The cross was between the female parent 'IDY-14-9' and the male parent 'IDY-29-2' both unpatented proprietary lines. The resultant seed was sown in 2003. In the same year a single plant was selected by the breeder based on branching, plant growh habit, size of double flowers and time of flowering.

Tests & Trials: Trials for 'Silte Rossa' were conducted in a polyhouse during the summer of 2008 in St. Thomas, Ontario. Trials included 15 plants each of the candidate and reference varieties. Rooted cuttings were transplanted into 15 cm pots on April 25, 2008. Observations and measurements were taken from 10 plants of each variety on June 23, 2008. All colour determinations were made using the 2001 Royal Horticultural Society (RHS) Colour Chart.

Comparison tables for 'Silte Rossa' with reference variety 'Balolerose'

Plant width (cm)

  'Silte Rossa' 'Balolerose'
mean 37.8 29.8
std. deviation 4.87 1.87

Leaf length (cm)

  'Silte Rossa' 'Balolerose'
mean 5.1 6.6
std. deviation 0.50 0.59

Leaf width (cm)

  'Silte Rossa' 'Balolerose'
mean 2.7 3.4
std. deviation 0.25 0.25

Click on image for larger view
Silte Rossa
Impatiens: 'Silte Rossa' (left) with reference variety 'Balolerose' (right)

Click on image for larger view
Silte Rossa
Impatiens: 'Silte Rossa' (left) with reference variety 'Balolerose' (right)

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