USTUN61801

Petunia

Variety Description

Variety used for comparison: 'Sunsurf Deniusa' (Surfinia Bouquet Denim)

Summary: The plants of 'USTUN61801' are shorter than those of 'Sunsurf Deniusa'. The lower third of the shoot of 'USTUN61801' is medium to thick while it is thin on 'Sunsurf Deniusa'. The leaf of 'USTUN61801' is medium to dark green and larger than that of 'Sunsurf Deniusa' which is light green. When newly opened, the inner side of the corolla of 'USTUN61801' is violet while that of 'Sunsurf Deniusa' is dark violet. The main colour of the inner side of the corolla tube is grey with light green veins for 'USTUN61801' while it is white for 'Sunsurf Deniusa'. Before dehiscence, the anther of 'USTUN61801' is yellowish white while it is light grey for 'Sunsurf Deniusa'.

Description:

PLANT: semi-upright growth habit
SHOOT: medium to thick on lower third

LEAF BLADE: elliptic shape, narrow acute apex, no variegation, medium to dark green on upper side, absent or weak blistering

PEDICEL: absent or very weak anthocyanin colouration
FLOWER: single type, salverform to funnelform shape
COROLLA: medium to strong degree of lobing, absent or very shallow incisions of margin, weak degree of undulation, absent or very weak conspicuousness of veins, purple veins, when newly opened inner side is mainly violet (darker than RHS N81A), when fully opened inner side is mainly violet (RHS N81A) with light violet overtones and dark violet to blue violet (RHS 83B-C) veins, when aged inner side is mainly violet to blue violet (RHS N82A-B) with brighter violet (RHS N81B) tones
COROLLA LOBE: cuspidate apex
COROLLA TUBE (INNER SIDE): grey (RHS 157C) with light green (RHS 145C-D) veins, absent or very weak conspicuousness of veins
COROLLA TUBE (OUTER SIDE): grey (RHS 157C) with light green (RHS 145B) veins
ANTHER: yellowish white before dehiscence

Origin & Breeding History: 'USTUN61801' originated from a controlled cross conducted by the breeder, Ushio Sakazaki, in Higashiomi, Shiga, Japan on May 6, 2011. The cross was made between the female parent 'Brietta Amethyst Blue' and the male parent 'Surfinia Cutie Blue'. The new plant was selected from the resulting progeny on May 24, 2012 in Bonsall, California, USA. 'USTUN61801' was selected based on its plant growth habit, good garden performance, flower size and flower colour. This variety was first propagated by vegetative tip cuttings on May 26, 2012 in Bonsall, California, USA.

Tests & Trials: The comparative trial for 'USTUN61801' was conducted in a polyhouse during the spring of 2015 at BioFlora Inc. 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 each one transplanted into a 15 cm pot on April 13, 2015. Observations and measurements were taken from 10 plants or parts of plants of each variety on May 25, 2015. All colour determinations were made using the 2007 Royal Horticultural Society (RHS) Colour Chart.

Comparison tables for 'USTUN61801' with reference variety 'Sunsurf Deniusa'

Plant height (cm)

Leaf length including petiole (cm)

Leaf width (cm)

Colour of corolla, when newly opened (RHS)

Colour of corolla tube (RHS)

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Petunia: 'USTUN61801' (left) with reference variety 'Sunsurf Deniusa' (right)

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Petunia: 'USTUN61801' (left) with reference variety 'Sunsurf Deniusa' (right)

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Petunia: 'USTUN61801' (left) with reference variety 'Sunsurf Deniusa' (right)