Denomination: 'USCAC06503'
Trade name: Superbells Double Plum
Botanical Name: Calibrachoa
Applicant/Holder: Plant 21 LLC
32149 Aquaduct Road
Bonsall, California
United States of America
Breeder: Ushio Sakazaki, Shiga, Japan
Agent in Canada: BioFlora Inc.
38723 Fingal Line
R.R. #1
St. Thomas, Ontario
N5P 3S5
Tel: 519-631-6241
Application Date: 2012-03-09
Application Number: 12-7542
Grant of Rights Date: 2014-09-29
Certificate Number: 4914
Date rights surrendered: 2017-08-29

Variety Description

Varieties used for comparison: 'USCAL83901' (Superbells Double Ruby) and 'KLECA10220' (MiniFamous Double Pink)

Summary: The leaf of 'USCAC06503' is longer than the leaf of both reference varieties. 'USCAC06503' has a longer sepal than both reference varieties. The flower of 'USCAC06503' has a smaller corolla diameter than 'USCAL83901', and a larger corolla diameter than 'KLECA10220'. The colour of the inner side of the corolla lobe is purple with violet tones for 'USCAC06503' while the inner side of the corolla lobe of 'USCAL83901' is red to dark pink red with a brown purple mid-vein, and the inner side of the corolla lobe of 'KLECA10220' is blue pink with pink tones and dark purple red mid-vein. The main colour of the outer side of the corolla lobe is brown purple to blue pink for 'USCAC06503' while it is brown purple with dark purple red tones for 'USCAL83901' and violet with purple to blue pink tones for 'KLECA10220'.


PLANT: upright growth habit with overall mounding appearance

LEAF BLADE: broad acute apex, no variegation, medium green on upper side

SEPAL: no anthocyanin colouration
FLOWER: double type, medium to strong degree of lobing
COROLLA LOBE: inner side is purple (RHS N79C) with violet tones (RHS 187C-D), medium conspicuousness of veins on inner side, outer side is brown purple to blue pink (RHS 186B-C) with brown purple (RHS 187A) mid-vein, truncate and emarginate apex
COROLLA TUBE: inner side is yellow (RHS 9A) with dark brown (closest to RHS 200A) veins, medium conspicuousness of veins

Origin & Breeding History: 'USCAC06503' originated from a controlled cross conducted by the breeder, Ushio Sakazaki, between proprietary seedling designated '08CJ12-1' as the female parent and 'C555-03' as the male parent. The cross was conducted in Higashiomi, Shiga, Japan, on May 8, 2009. 'USCAC06503' was selected as a single plant from the resultant progeny on May 27, 2010 in Bonsall, California, USA. Its selection was based on flower colour, double-type flower, early flowering, and plant growth habit. The first propagation by vegetative cutting of 'USCAC06503' took place on May 28, 2010 in Bonsall, California, USA.

Tests & Trials: The trial for 'USCAC06503' was conducted in a polyhouse during the spring of 2013 at BioFlora Inc. in St. Thomas, Ontario. There were a total of 20 plants each of the candidate and reference varieties. All plants were grown from rooted cuttings and transplanted into 30 cm diameter hanging baskets on May 7, 2013. Each basket contained 4 cuttings with a total of 5 baskets per variety. Observations and measurements were taken from 10 plants or parts of plants on July 3, 2013. All colour determinations were made using the 2007 Royal Horticulture Society (RHS) Colour Chart.

Comparison tables for 'USCAC06503' with reference varieties 'USCAL83901' and 'KLECA10220'

Leaf length (cm)

  'USCAC06503' 'USCAL83901' 'KLECA10220'
mean 3.9 3.3 3.1
std. deviation 0.09 0.12 0.16

Sepal length (cm)

  'USCAC06503' 'USCAL83901' 'KLECA10220'
mean 1.3 1.1 0.9
std. deviation 0.13 0.11 0.11

Corolla diameter (cm)

  'USCAC06503' 'USCAL83901' 'KLECA10220'
mean 3.2 3.8 2.9
std. deviation 0.14 0.15 0.14

Colour of corolla lobe (RHS)

  'USCAC06503' 'USCAL83901' 'KLECA10220'
inner side closest to N79C with 187C-D tones closest to 46C-D with darker than 187A mid-vein N74C-D with N66C tones and close to 187B mid-vein
outer side 186B-C with 187A mid-vein closest to 185C-D with 187D tones and darker than 187A mid-vein 75D with N74B-C tones and closest to 187A mid-vein

Click on image for larger view
Calibrachoa: 'USCAC06503' (left) with reference varieties 'USCAL83901' (centre) and 'KLECA10220' (right)

Click on image for larger view
Calibrachoa: 'USCAC06503' (left) with reference varieties 'USCAL83901' (centre) and 'KLECA10220' (right)

Click on image for larger view
Calibrachoa: 'USCAC06503' (left) with reference varieties 'USCAL83901' (centre) and 'KLECA10220' (right)

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