Denomination: 'Sunbelkusubu'
Trade name: Million Bells Trailing Blue Sky
Botanical Name: Calibrachoa
Applicant/Holder: Suntory Flowers Limited
Administrative Division
4-17-5 Shiba, Minato-ku
Breeder: Takeshi Kanaya, 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: 2006-07-06
Application Number: 06-5524
Grant of Rights Date: 2008-08-29
Certificate Number: 3316
Date rights surrendered: 2010-08-17

Variety Description

Varieties used for comparison: 'Sunbel-labu' (Million Bells Lavender) and 'KLEC03079' (MiniFamous Light Blue Evolution)

Summary: The plants of 'Sunbelkusubu' are shorter than both reference varieties. 'Sunbelkusubu' has longer leaf blades than 'Sunbel-labu'. The sepals of 'Sunbelkusubu' are longer than those of 'Sunbel-labu'. 'Sunbelkusubu' has a larger corolla diameter than 'Sunbel-labu'. The main colour on the upper side of the corolla of 'Sunbelkusubu' is violet while it is light blue violet on 'Sunbel-labu'. 'Sunbelkusubu' has white secondary colour at area of transition to the corolla tube while it is violet for 'Sunbel-labu' and dark violet for 'KLEC03079'. The lower side of the corolla of 'Sunbelkusubu' is light blue violet while it is violet on 'KLEC03079'. The corolla tube of 'Sunbelkusubu' is longer than that of both reference varieties. 'Sunbelkusubu' has weaker conspicuousness of veins on the inner side of the corolla tube than 'Sunbel-labu' and 'KLEC03079'.


PLANT: cascading growth habit, short to medium height, medium width
SHOOT: medium thickness, medium length, absent to very weak anthocyanin colouration

LEAF BLADE: medium to long, narrow, elliptic, narrow acute apex, no variegation, medium green colour on upper side
PETIOLE: medium length

SEPAL: medium length and width, elliptic and rhombic, no anthocyanin colouration
FLOWER: single type, funnel form, medium pedicel length
COROLLA: medium to large diameter, weak degree of lobing, two colours on upper side
COROLLA LOBE: upper side is violet with white at area of transition to corolla tube, weakly conspicuous purple and red veins on upper side, light blue violet on lower side, medium to strong undulation of margin
COROLLA TUBE: long to very long, light yellow on inner side, very weak conspicuousness of veins on inner side
ANTHER: yellowish white before pollen dehiscence, yellow after pollen dehiscence

Origin & Breeding History: 'Sunbelkusubu' originated from a cross between the female parent '9CL26' and the male parent '9CL33'. The cross took place in April 2002, at the Omi R&D Center of Suntory Flowers Ltd. located in Higashiomi-shi, Shiga-ken, Japan. In September 2002, 50 seedlings were obtained and grown in greenhouse trials. 'Sunbelkusubu' was finally selected in September 2003 based on its flower colour and growth habit.

Tests & Trials: Trials for 'Sunbelkusubu' were conducted during the summer of 2007, in a polyhouse, in St. Thomas, Ontario. The trial included 20 plants each of the candidate and reference varieties. All plants were grown from rooted cuttings and transplanted into 30 cm hanging baskets on May 1, 2007. Each basket contained 4 cuttings with a total of 5 baskets per variety. Observations and measurements were taken from 10 plants of each variety (except for plant height where 4 or 5 plants were measured) on June 29, 2007. All colour determinations were made using the 2001 Royal Horticultural Society (RHS) Colour Chart.

Comparison tables for 'Sunbelkusubu' with reference varieties 'Sunbel-labu' and 'KLEC03079'

Plant height (cm)

  'Sunbelkusubu' 'Sunbel-labu' 'KLEC03079'
mean 9.6 13.5 13.2
std. deviation 0.65 1.00 1.10

Leaf blade length (cm)

  'Sunbelkusubu' 'Sunbel-labu' 'KLEC03079'
mean 3.3 2.6 3.3
std. deviation 0.19 0.19 0.33

Sepal length (mm)

  'Sunbelkusubu' 'Sunbel-labu' 'KLEC03079'
mean 13.8 10.2 12.5
std. deviation 1.32 0.92 1.35

Corolla tube length (mm)

  'Sunbelkusubu' 'Sunbel-labu' 'KLEC03079'
mean 18.3 14.1 14.9
std. deviation 0.95 0.88 1.37

Corolla diameter (cm)

  'Sunbelkusubu' 'Sunbel-labu' 'KLEC03079'
mean 2.9 2.2 3.0
std. deviation 0.25 0.20 0.41

Main colour of corolla lobe (RHS)

  'Sunbelkusubu' 'Sunbel-labu' 'KLEC03079'
upper side N82C with N82B along mid-vein 84D with 76B secondary veins N87B-C
lower side 85D with 85C along crease 76B and 85D N87D

Secondary colour of corolla lobe (RHS)

  'Sunbelkusubu' 'Sunbel-labu' 'KLEC03079'
upper side 155A N82C-D more purple than 86A

Click on image for larger view
Calibrachoa: 'Sunbelkusubu' (left) with reference varieties 'Sunbel-labu' (center) and 'KLEC03079' (right)

Click on image for larger view
Calibrachoa: 'Sunbelkusubu' (left) with reference varieties 'Sunbel-labu' (center) and 'KLEC03079' (right)

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