Denomination: 'PEHY0004'
Previously Proposed Denomination: 'PETZ0004'
Trade name: Whispers Rose Star
Botanical Name: Petunia ×hybrida
Applicant/Holder: Syngenta Crop Protection AG
Schwarzwaldallee 215
Breeder: Mitchell Hanes, Syngenta Flowers, Inc., Gilroy, United States of America
Agent in Canada: BioFlora Inc.
38723 Fingal Line
R.R. #1
St. Thomas, Ontario
N5P 3S5
Tel: 519-631-6241
Application Date: 2010-12-17
Application Number: 10-7133
Grant of Rights Date: 2013-06-19
Certificate Number: 4547
Date rights surrendered: 2015-06-19

Variety Description

Varieties used for comparison: 'Pic Rossa' (Picnic Rose) and 'Whispers Pink'

Summary: The plant growth habit for 'PEHY0004' is creeping whereas it is upright for 'Pic Rossa'. The plants and leaves of 'PEHY0004' are shorter than those of both reference varieties. The leaf apex of 'PEHY0004' is broad acute whereas it is narrow acute for both reference varieties. There are two colours on the upper side of the corolla lobe of 'PEHY0004' whereas there is only one colour on the lobes of both reference varieties. Undulation of the corolla lobe margins is weak for 'PEHY0004' whereas it is medium for both reference varieties. The corolla tube of 'PEHY0004' is light blue pink to light blue violet whereas it is light blue violet for 'Pic Rossa' and white for 'Whispers Pink'.


PLANT: creeping growth habit, thin to medium thickness of shoots

LEAF: elliptic, broad acute apex, no variegation, dark green on upper side

SEPAL: elliptic, no anthocyanin colouration
FLOWER: single, funnelform, red veins
COROLLA LOBE: two colours on upper side, main colour on upper side is purple red (RHS N66B) with darker purple red (RHS N66A) towards base, secondary colour located on margin of upper side is blue pink (RHS 73A-B), weak to medium conspicuousness of veins on upper side, weak undulation of margin
COROLLA TUBE: light blue pink to light blue violet (RHS 69B-C) on inner side, medium conspicuousness of violet (RHS N77B) veins on inner side
ANTHERS: yellowish-white before dehiscence

Origin & Breeding History: 'PEHY0004' originated from a controlled cross made in August 2007 in Gilroy, California, USA between the female parent '1749-1' and the male parent '1864-12'. A single plant was selected from the resultant progeny in March 2008 based on flower colour, plant growth habit and production characteristics.

Tests & Trials: Trials for 'PEHY0004' were conducted in a polyhouse during the spring of 2012 at BioFlora Inc. 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 15 cm pots on April 25, 2012. Observations and measurements were taken from 10 plants of each variety on May 25, 2012. All colour determinations were made using the 2007 Royal Horticultural Society (RHS) Colour Chart.

Comparison tables for 'PEHY0004' with reference varieties 'Pic Rossa' and 'Whispers Pink'

Plant height (cm)

  'PEHY0004' 'Pic Rossa' 'Whispers Pink'
mean 8.1 15.1 11.6
std. deviation 0.8 1.49 0.62

Leaf length (cm)

  'PEHY0004' 'Pic Rossa' 'Whispers Pink'
mean 2.9 3.6 4.2
std. deviation 0.19 0.25 0.41

Colour of corolla tube (RHS)

  'PEHY0004' 'Pic Rossa' 'Whispers Pink'
inner side 69B-C 76C-D closest to NN155A
veins N77B N77A 150C

Click on image for larger view
Petunia: 'PEHY0004' (left) with reference varieties 'Pic Rossa' (centre) and 'Whispers Pink' (right)

Click on image for larger view
Petunia: 'PEHY0004' (left) with reference varieties 'Pic Rossa' (centre) and 'Whispers Pink' (right)

Click on image for larger view
Petunia: 'PEHY0004' (left) with reference varieties 'Pic Rossa' (centre) and 'Whispers Pink' (right)

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