Kakegawa S28


Denomination: 'Kakegawa S28'
Trade name: Supertunia Royal Velvet
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: 2000-05-23
Application Number: 00-2280
Grant of Rights Date: 2001-10-01
Certificate Number: 1039
Grant of Rights Termination Date: 2019-10-01

Variety Description

Variety used for comparison: 'Purple Wave'

Summary: 'Kakegawa S28' is a petunia variety with darker green foliage than the reference variety 'Purple Wave'. The flowers are a deep blue-violet, whereas 'Purple Wave' has pink-purple flowers.


'Kakegawa S28' is a petunia variety with a pendulous growth habit, moderate branching and short internodes. The leaves of 'Kakegawa S28' are dark green, ovate in shape and have an acute apex. Pubescence on the upper and lower leaf surfaces is sparse. The sepals of 'Kakegawa S28' are spatulate. 'Kakegawa S28' produces single, funnelform, blue-violet flowers. The throat of the corolla is dark blue-violet and the veins are not prominent. The margins of the corolla lobes are entire. The calyx lobes are less than one quarter the length of the corolla tube.

Origin & Breeding History: The development of 'Kakegawa S28' began in 1994 with the line Pg-9a-2a being crossed with breeding line 2H-1. From this cross, an F2 plant was crossed to 'Surfinia Violet'. This hybrid was then selected to the F4 level to produce 5BC-15A-1A-2. In 1996 this line was then hybridized with a blue flowered petunia with dwarf habit known as breeding line 3B-80A-1b-1a. This breeding work was performed at the Sakata Seed Corporation Breeding Station in Kakegawa, Japan. In the summer of 1998, 200 F1 plants were transplanted to a field in Salinas, California. Seven lines were selected for further evaluation and from these one was finally selected in the summer of 1999 and named 'Kakegawa S28'.

Tests & Trials: Tests and trials for 'Kakegawa S28' were conducted at Ed Sobkowich Greenhouses Ltd., Grimsby, Ontario in the spring and early summer of 2000. The trials consisted of thirteen plants of each variety, grown in 10 cm pots. The pots were spaced in flats on 12.5 cm centres.

Comparison tables for 'Kakegawa S28' with reference variety 'Purple Wave'

Length of longest stem internode (cm)

  'Kakegawa S28' 'Purple Wave'
mean 2.43 4.19
standard deviation 0.35 1.38

Leaf length (cm)

  'Kakegawa S28' 'Purple Wave'
mean 4.55 6.35
standard deviation 0.72 0.69

Leaf width (cm)

  'Kakegawa S28' 'Purple Wave'
mean 3.08 3.90
standard deviation 0.46 0.47

Colour of inner side of corolla (RHS)

  'Kakegawa S28' 'Purple Wave'
margin 89A 74A
middle 89A 74A
throat 89A 89A

Colour of corolla on outer side (RHS)

  'Kakegawa S28' 'Purple Wave'
middle 89B 74B
throat 89D 78B
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