Denomination: 'Sunsurfsirou'
Trade name: Surfinia Trailing White Improved
Botanical Name: Petunia ×hybrida
Applicant/Holder: Suntory Flowers Limited
Administrative Division
4-17-5 Shiba, Minato-ku
Tel: +81-3-5419-1382

Keisei Rose Nurseries Inc.
1-12-1 Oshiage
Breeder: Kenichi Suzuki, Suntory Flowers Limited, Osaka, Japan
Yasuko Isobe, Suntory Flowers Limited, Shiga, Japan
Agent in Canada: BioFlora Inc.
38723 Fingal Line
R.R. #1
St. Thomas, Ontario
N5P 3S5
Tel: 519-631-6241
Application Date: 2012-03-21
Application Number: 12-7569
Grant of Rights Date: 2014-05-23
Certificate Number: 4805
Grant of Rights Termination Date: 2032-05-23

Variety Description

Variety used for comparison: 'Kakegawa S30' (Supertunia White)

Summary: The leaves of 'Sunsurfsirou' are medium green on the upper side and longer than those of 'Kakegawa S30' which are dark green. The pedicels and corolla tubes of 'Sunsurfsirou' are shorter than those of 'Kakegawa S30'. The flowers of 'Sunsurfsirou' are funnelform whereas those of 'Kakegawa S30' are salverform. The inner side of the corolla tubes of 'Sunsurfsirou' are white with light yellow brown veins whereas those of 'Kakegawa S30' are yellow green with brown purple veins.


PLANT: creeping growth habit, thick to very thick shoots on lower third
LEAF BLADE: ovate and elliptic, broad acute apex, no variegation, medium green on upper side, no blistering

SEPAL: linear to obovate, no anthocyanin colouration
FLOWER: single, funnelform, green veins
COROLLA LOBE: one colour on upper side, upper side white (RHS NN155C-D), weak conspicuousness of veins on upper side, medium undulation of margin
COROLLA TUBE: inner side white (RHS NN155C) with light yellow brown (RHS 160A) veins, medium conspicuousness of veins on inner side
ANTHERS: yellow before dehiscence

Origin & Breeding History: 'Sunsurfsirou' originated from the ionic carbon irradiation of 100 pieces of in-vitro axillary buds of the variety 'SB-W', a proprietary selection. The irradiation was conducted in July 2006, at Higashiomi-shi, Shiga, Japan. Two weeks later the elongated buds were grown from cuttings. In October 2006, the new Petunia variety was discovered as a branch mutation of 'SB-W'. The new plant was propagated by cuttings and grown in a controlled greenhouse environment. A trial was carried out from April to September 2008 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 'Sunsurfsirou'.

Tests & Trials: Trials for 'Sunsurfsirou' 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 'Sunsurfsirou' with reference variety 'Kakegawa S30'

Leaf length (cm)

  'Sunsurfsirou' 'Kakegawa S30'
mean 4.8 3.4
std. deviation 0.35 0.31

Pedicel length (cm)

  'Sunsurfsirou' 'Kakegawa S30'
mean 2.2 2.9
std. deviation 0.26 0.28

Corolla tube length (cm)

  'Sunsurfsirou' 'Kakegawa S30'
mean 3.1 3.5
std. deviation 0.08 0.19

Colour of corolla tube (RHS)

  'Sunsurfsirou' 'Kakegawa S30'
inner side NN155C with veins closest to 160A 154B-C with veins closest to 187A

Click on image for larger view
Petunia: 'Sunsurfsirou' (left) with reference variety 'Kakegawa S30' (right)

Click on image for larger view
Petunia: 'Sunsurfsirou' (left) with reference variety 'Kakegawa S30' (right)

Click on image for larger view
Petunia: 'Sunsurfsirou' (left) with reference variety 'Kakegawa S30' (right)

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