Denomination: 'USTUN51501'
Trade name: Supertunia Orchid Charm
Botanical Name: Petunia
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: 2012-12-28
Application Number: 12-7838
Grant of Rights Date: 2014-05-23
Certificate Number: 4784
Date rights surrendered: 2017-05-19

Variety Description

Varieties used for comparison: 'Petlilav' (Whispers Lavender Eye) and 'USTUN19603' (Supertunia Pink Charm)

Summary: The shoots of 'USTUN51501' are thin and shorter than those of 'Petlilav' which are medium to thick. The leaf blades of 'USTUN51501' are narrower than those of 'Petlilav' and wider than those of 'USTUN19603'. The pedicels of 'USTUN51501' are shorter than those of 'Petlilav'. The sepals of 'USTUN51501' are larger than those of 'USTUN19603'. The flowers of 'USTUN51501' are smaller than those of 'Petlilav'. The upper side of the corolla lobes of 'USTUN51501' have medium conspicuousness of veins whereas those of 'USTUN19603' have absent or very weak conspicuousness of veins. The corolla lobes of 'USTUN51501' have weak undulation of the margin whereas those of 'USTUN19603' have medium to strong undulation of the margin. The corolla tube of 'USTUN51501' is shorter than that of 'Petlilav'. The inner side of the corolla tube of 'USTUN51501' has strong conspicuousness of veins whereas that of 'USTUN19603' has weak conspicuousness of veins. The anthers of 'USTUN51501' are medium blue whereas those of 'Petlilav' are violet and those of 'USTUN19603' are yellowish white.


PLANT: upright to creeping growth habit, thin shoots on lower third

LEAF BLADE: ovate and elliptic, narrow to broad acute apex, no variegation, medium green on upper side, no blistering

SEPAL: spatulate, no anthocyanin colouration
FLOWER: single, funnelform, purple veins
COROLLA LOBE: one colour on upper side, upper side when newly opened blue pink (RHS 71D), upper side when fully opened blue pink (RHS N74D) and violet (RHS 75B) with blue pink (RHS 72D) secondary veins, medium conspicuousness of veins on upper side, weak undulation of margin
COROLLA TUBE: inner side violet (RHS N80C) with brown purple (RHS N77A) veins, strong conspicuousness of veins on inner side
ANTHERS: medium blue before dehiscence

Origin & Breeding History: 'USTUN51501' originated from a controlled cross conducted by the breeder between the female parent variety 'Ice White' and the male parent 'P415-01', a proprietary seedling. The cross was conducted in Higashiomi, Shiga, Japan on May 18, 2010. The new Petunia variety 'USTUN51501' was selected as a single plant from the resultant progeny on May 13, 2011, in Bonsall, California, USA based on plant habit, plant vigour, branching, flowering size, flower colour and heat tolerance. 'USTUN51501' was first propagated by vegetative tip cuttings on May 14, 2011, in Bonsall, California, USA.

Tests & Trials: 'Trials for 'USTUN51501' 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 13, 2013. All colour determinations were made using the 2007 Royal Horticultural Society (RHS) Colour Chart.

Comparison tables for 'USTUN51501' with reference varieties 'Petlilav' and 'USTUN19603'

Shoot length (cm)

  'USTUN51501' 'Petlilav' 'USTUN19603'
mean 13.9 21.0 15.4
std. deviation 2.05 0.82 1.50

Leaf width (cm)

  'USTUN51501' 'Petlilav' 'USTUN19603'
mean 2.0 2.5 1.6
std. deviation 0.11 0.16 0.12

Pedicel length (cm)

  'USTUN51501' 'Petlilav' 'USTUN19603'
mean 1.5 3.6 1.4
std. deviation 0.40 0.56 0.06

Sepal length (cm)

  'USTUN51501' 'Petlilav' 'USTUN19603'
mean 1.3 1.4 0.9
std. deviation 0.15 0.10 0.06

Sepal width (cm)

  'USTUN51501' 'Petlilav' 'USTUN19603'
mean 0.5 0.5 0.2
std. deviation 0.05 0.07 0.00

Flower diameter (cm)

  'USTUN51501' 'Petlilav' 'USTUN19603'
mean 3.7 5.4 3.5
std. deviation 0.10 0.34 0.10

Corolla tube length (cm)

  'USTUN51501' 'Petlilav' 'USTUN19603'
mean 2.5 2.9 2.3
std. deviation 0.15 0.13 0.08

Click on image for larger view
Petunia: 'USTUN51501' (left) with reference varieties 'Petlilav' (centre) and 'USTUN19603' (right)

Click on image for larger view
Petunia: 'USTUN51501' (left) with reference varieties 'Petlilav' (centre) and 'USTUN19603' (right)

Click on image for larger view
Petunia: 'USTUN51501' (left) with reference varieties 'Petlilav' (centre) and 'USTUN19603' (right)

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