Kakegawa S36


Denomination: 'Kakegawa S36'
Trade name: Supertunia Royal Magenta
Botanical Name: Petunia ×hybrida
Applicant/Holder: Sakata Seed Corporation
2-7-1 Nakamachidai
Breeder: Masao Bessho, Shizuoka, Japan
Agent in Canada: Variety Rights Management
475 County Road 18
R.R. #2
Oxford Station, Ontario
K0G 1T0
Tel: 613-258-9015
Application Date: 2001-02-28
Application Number: 01-2537
Grant of Rights Date: 2003-02-17
Certificate Number: 1396
Grant of Rights Termination Date: 2021-02-17

Variety Description

Variety used for comparison: 'Purple Wave'

Summary: 'Kakegawa S36' is a single petunia which produces larger leaves than 'Purple Wave'. Pubescence of the leaf blade for 'Kakegawa S36' is absent to very sparse on the upper surface and sparse on the lower surface while for 'Purple Wave' it is moderate on the upper and lower surfaces. 'Kakegawa S36' has obovate shaped sepals while those of 'Purple Wave' are linear. The corolla (corolla tube included) for 'Kakegawa S36' is longer and larger in diameter than that of 'Purple Wave'. Prominence of the veins on the inner side of the throat of the corolla is weak for 'Kakegawa S36' while it is strong for 'Purple Wave'. The flowers of 'Kakegawa S36' have calyx lobes which are more than ½ the length of the corolla tube while those of 'Purple Wave' are 1/4 to ½ the length of the corolla tube.


'Kakegawa S36' is a petunia variety which has horizontal to semi-pendulous growth habit, short plant height and moderate branching. Shape of the leaves is broad elliptic with an acute shaped apex. The leaves have absent to very sparse pubescence on the upper surface and sparse pubescence on the lower surface. Colour of the leaves is medium green.

'Kakegawa S36' produces single flowers. The overall flower shape is funnel form and the sepals are obovate in shape. Colour of the flowers produced by 'Kakegawa S36' is purple on the inner and outer sides of the corolla, dark violet to blue violet on the inner side of the throat and violet purple on the outer side of the throat. The veins on the outer side of the throat of the corolla are green purple in colour. Prominence of the veins on the inner side of the throat of the corolla is weak. Prominent colour markings on the inner side of the corolla are absent. The corolla lobes are medium in size and have entire margins. The corolla lobes are more than half the length of the corolla tube. The stamens are positioned below, above and at the same level of the stigma. The colour of the style is greenish-purple. There are five stamens with filaments that are greenish-white in colour with violet at the base and anthers that are pale blue. Mature pollen is blue in colour. The ovule is ovate in shape.

Origin & Breeding History: 'Kakegawa S36' originated from a cross between the female parent, a dwarf, multiflora, cherry coloured breeding line known as '88S-1318-1a-1a-1' and the male parent, breeding line 'P-1a'. The cross took place at the Sakata Seed Corporation's breeding station in Kakegawa, Japan in 1995. Seed obtained from this cross was germinated and the resulting plants were grown in Kakegawa, Japan and evaluated during the spring of 1996. F1 plants were transplanted to the field at the Sakata Seed America, Inc. research station in Salinas, California during the summer of 1998. Two lines were selected and vegetatively propagated for further evaluation. The two lines were re-propagated in 1999 and evaluated for trueness to type and ease of propagation. Final selection of 'Kakegawa S36' based on its creeping, mounded growth habit and magenta flower colour occurred in the summer of 1999.

Tests & Trials: Tests and trials for 'Kakegawa S36' were conducted in a greenhouse at Ed Sobkowich Greenhouses, Ltd., Grimsby, Ontario during the summer of 2001. The trials consisted of plants grown in 10 cm pots spaced 12.5 cm, center to center. There were a minimum of ten plants per variety. Unless otherwise indicated, measured characteristics were based on ten measurements.

Comparison tables for 'Kakegawa S36' with reference variety 'Purple Wave'

Leaf length (cm)

  'Kakegawa S36' 'Purple Wave'
mean 6.92 6.08
std. deviation 0.50 0.62

Leaf width (cm)

  'Kakegawa S36' 'Purple Wave'
mean 4.20 3.37
std. deviation 0.56 0.52

Length of corolla (including corolla tube) (cm)

  'Kakegawa S36' 'Purple Wave'
mean 5.77 4.35
std. deviation 0.20 0.28

Diameter of corolla (cm)

  'Kakegawa S36' 'Purple Wave'
mean 6.73 6.23
std. deviation 0.23 0.31

Colour of corolla (RHS)

  'Kakegawa S36' 'Purple Wave'
outer side 72B 75B/75C
inner side - margin 71B 70A
inner side - middle zone 71B 70A

Colour of throat (RHS)

  'Kakegawa S36' 'Purple Wave'
outer side 88B 87B/87C
inner side 86A/86B 89A
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