Sundasiro

Petunia

Denomination: 'Sundasiro'
Trade name: Surfinia Summer Double White
Botanical Name: Petunia ×hybrida
Applicant/Holder: Suntory Flowers Limited
Administrative Division
4-17-5 Shiba, Minato-ku
Tokyo
108-0014
Japan
Breeder: Nobutaka Akai, Miyazaki, Japan
Agent in Canada: BioFlora Inc.
38723 Fingal Line
R.R. #1
St. Thomas, Ontario
N5P 3S5
Canada
Tel: 519-631-6241
Application Date: 2012-03-12
Application Number: 12-7557
Grant of Rights Date: 2014-05-23
Certificate Number: 4801
Grant of Rights Termination Date: 2032-05-23

Variety Description

Varieties used for comparison: 'AK101' and 'Kirimaji Double White' (Double Wave White)

Summary: The plants of 'Sundasiro' are mounding whereas those of 'Kirimaji Double White' are creeping. The plants of 'Sundasiro' are shorter than those of 'AK101' and taller than those of 'Kirimaji Double White'. The shoots of 'Sundasiro' are longer than those of 'AK101'. The leaves of 'Sundasiro' are smaller than those of 'Kirimaji Double White'. The leaf blades of 'Sundasiro' are ovate with a narrow acute apex whereas those of 'Kirimaji Double White' are broadly ovate and circular with a broadly acute apex. The sepals of 'Sundasiro' are linear whereas those of 'Kirimaji Double White' are spatulate. The flowers of 'Sundasiro' are larger than those of 'AK101' and smaller than those of 'Kirimaji Double White'. The upper side of the corolla lobes of 'Sundasiro' are white whereas those of 'AK101' are purple. The veins on the inner side of the corolla tube of 'Sundasiro' are light green whereas those of 'AK101' are dark violet to violet and those of 'Kirimaji Double White' are brown.

Description:

PLANT: mounding growth habit, medium shoot thickness on lower third

LEAF BLADE: ovate, narrow acute apex, no variegation, dark green on upper side, no blistering

SEPAL: linear, no anthocyanin colouration
FLOWER: double, funnelform, yellow green veins
COROLLA LOBE: one colour on upper side, upper side white (RHS NN155C), weak conspicuousness of veins on upper side, medium undulation of margin
COROLLA TUBE: inner side white (RHS 155C) with light green (RHS 144B-C) veins, medium conspicuousness of veins on inner side
ANTHERS: yellowish white before dehiscence

Origin & Breeding History: 'Sundasiro' originated as a naturally occurring branch mutation of the variety 'AK-Pet3', discovered in June 2010. The new plant was propagated by cuttings and grown in a controlled environment at Miyazaki-shi, Miyazaki, Japan. A trial was carried out from June 2010 to August 2011 where the botanical characteristics of the variety were examined. After determining that the new variety was distinguishable from any other varieties, and uniform and stable in its characteristics, the new variety was named 'Sundasiro'.

Tests & Trials: Trials for 'Sundasiro' were conducted in a polyhouse during the spring of 2013 in St. Thomas, Ontario. The trial included a total of 20 plants each of the candidate and reference variety. All plants were grown from rooted cuttings and transplanted into 15 cm pots on April 10, 2013. Observations and measurements were taken from 10 plants of each variety on May 14, 2013. All colour determinations were made using the 2007 Royal Horticultural Society (RHS) Colour Chart.


Comparison tables for 'Sundasiro' with reference varieties 'AK101' and 'Kirimaji Double White'

Plant height (cm)

  'Sundasiro' 'AK101' 'Kirimaji Double White'
mean 13.3 18.6 7.9
std. deviation 2.48 1.34 0.74

Shoot length (cm)

  'Sundasiro' 'AK101' 'Kirimaji Double White'
mean 20.6 16.9 21.7
std. deviation 1.64 0.82 1.31

Leaf length (cm)

  'Sundasiro' 'AK101' 'Kirimaji Double White'
mean 2.9 3.0 3.8
std. deviation 0.12 0.17 0.21

Leaf blade width (cm)

  'Sundasiro' 'AK101' 'Kirimaji Double White'
mean 1.6 1.3 2.8
std. deviation 0.18 0.15 0.18

Flower diameter (cm)

  'Sundasiro' 'AK101' 'Kirimaji Double White'
mean 4.8 3.9 5.2
std. deviation 0.20 0.25 0.44

Colour of corolla lobes (RHS)

  'Sundasiro' 'AK101' 'Kirimaji Double White'
upper side NN155C N74A-B NN155C

Colour of corolla tube (RHS)

  'Sundasiro' 'AK101' 'Kirimaji Double White'
inner side 155C with 144B-C veins N155B with veins close to N77C-D 155C with veins close to 166A

Click on image for larger view
Sundasiro
Petunia: 'Sundasiro' (left) with reference varieties 'AK101' (centre) and 'Kirimaji Double White' (right)

Click on image for larger view
Sundasiro
Petunia: 'Sundasiro' (left) with reference varieties 'AK101' (centre) and 'Kirimaji Double White' (right)

Click on image for larger view
Sundasiro
Petunia: 'Sundasiro' (left) with reference varieties 'AK101' (centre) and 'Kirimaji Double White' (right)

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