Denomination: 'USTUNI153'
Trade name: Supertunia Giant Pink
Botanical Name: Petunia ×hybrida
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: 2002-10-08
Application Number: 02-3319
Grant of Rights Date: 2004-09-16
Certificate Number: 1934
Grant of Rights Termination Date: 2022-09-16

Variety Description

Varieties used for comparison: 'Revolution Brilliant Pink' (Surfinia Purple/Brilliant Pink), 'Sunlapur' (Surfinia Giant Purple) and 'KLEC02038' (MiniFamous Lavender Pink)

Summary: 'USTUNI153' has shorter shoots than 'Revolution Brilliant Pink' and 'Sunlapur'. The leaf blade of 'USTUNI153' is slightly larger than 'Revolution Brilliant Pink' and 'KLEC02038' and slightly wider than all of them. 'USTUNI153' has a sepal that is slightly shorter than in 'Sunlapur' but slightly longer than in 'KLEC02038' and is wider than in 'Revolution Brilliant Pink' and 'KLEC02038'. 'USTUNI153' has a larger corolla diameter than 'Revolution Brilliant Pink' and 'KLEC02038'. The degree of lobing of the corolla in 'USTUNI153' is stronger than in 'KLEC02038'. 'USTUNI153' has weaker conspicuousness of the veins on the corolla lobe than 'Revolution Brilliant Pink' and 'Sunlapur' and inside the corolla tube than 'Revolution Brilliant Pink', 'Sunlapur' and 'KLEC02038'. The colour on the inside of the corolla tube in 'USTUNI153' is white while it is violet to dark violet in 'Revolution Brilliant Pink' and 'Sunlapur'.


'USTUNI153' is a petunia variety with a creeping growth habit. The shoots are medium in length with no anthocyanin present. The leaves are medium green, ovate to elliptic in shape with a narrow to broadly acute apex. There is no variegation on the leaf blade, and there is blistering present. The sepals are linear to elliptic in shape with no anthocyanin present. 'USTUNI153' produces single, funnelform, pink flowers. The corolla has strong lobing, undulation of the margin and absent to very weak conspicuousness of the pale red/green veins. The corolla lobe apex is acute to cuspidate. The inside of the corolla tube is white and has veins of weak to medium conspicuousness. Anther colour is a yellowish white.

Origin & Breeding History: 'USTUNI153' is the product of a planned breeding program conducted by the breeder, Ushio Sakazaki of Hikone Shiga, Japan. The objectives of the program was to create new trailing petunia varieties with unique flowers, and greater disease resistance and heat tolerance. 'USTUNI153' originated from a cross made by the breeder on May 6, 1998 in Shiga, Japan, with the seed raised petunia variety 'Titan Pink' as the female parent, and a wild petunia as the male parent. The F1 seed was collected and sent to Gensingen, Germany for further breeding and selection. 'USTUNI153' was selected as a single plant from the resulting progeny on June 15, 1999 in Germany. The new petunia was selected based on larger flower size.

Tests & Trials: Tests and trials for 'USTUNI153' were conducted in a polyhouse at BioFlora Inc., St. Thomas, Ontario during the summer of 2003. The trials included 15 plants of each variety. Rooted cuttings were transplanted into 15cm pots on April 25, 2003 (week 17). All colour measurements were made using RHS colour chart 2001. Unless otherwise indicated measured characteristics were based on ten measurements.

Comparison tables for 'USTUNI153' with reference varieties 'Revolution Brilliant Pink', 'Sunlapur' and 'KLEC02038'

Shoot length (cm)

  'USTUNI153' 'Revolution Brilliant Pink' 'Sunlapur' 'KLEC02038'
mean 42.3 53.5 52.6 45.3
std. deviation 2.751 4.972 7.633 4.498

Leaf length (cm)

  'USTUNI153' 'Revolution Brilliant Pink' 'Sunlapur' 'KLEC02038'
mean 5.65 4.52 5.42 4.46
std. deviation 0.706 0.489 0.603 0.272

Leaf width (cm)

  'USTUNI153' 'Revolution Brilliant Pink' 'Sunlapur' 'KLEC02038'
mean 3.7 2.41 2.75 2.48
std. deviation 0.796 0.341 0.284 0.221

Sepal length (mm)

  'USTUNI153' 'Revolution Brilliant Pink' 'Sunlapur' 'KLEC02038'
mean 24.5 23.5 28.15 19.95
std. deviation 1.434 2.550 1.454 1.921

Sepal width (mm)

  'USTUNI153' 'Revolution Brilliant Pink' 'Sunlapur' 'KLEC02038'
mean 9.7 7.1 9.58 3.85
std. deviation 1.059 1.287 1.119 0.580

Diameter of corolla (mm)

  'USTUNI153' 'Revolution Brilliant Pink' 'Sunlapur' 'KLEC02038'
mean 99.8 81 91.7 81.3
std. deviation 9.175 6.716 6.584 4.191

Colour of corolla lobe (RHS)

  'USTUNI153' 'Revolution Brilliant Pink' 'Sunlapur' 'KLEC02038'
inner side N74A with tones N66B darker than 74A darker than N74A N74A-B
outer side N66D with 75D close to mid veins and base 72A-B 77B-C with tones of N74B N74C with 75C-D close to mid veins and base

Colour of corolla tube (RHS)

  'USTUNI153' 'Revolution Brilliant Pink' 'Sunlapur' 'KLEC02038'
inner side N155C, veins 144B N81B, veins 187A 83B/C, veins 187A 155C, veins 186B
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