Denomination: 'MPD2'
Trade name: Double Tiny Tunia Blue Ice
Botanical Name: Petunia ×hybrida
Applicant/Holder: NuFlora International Pty. Ltd.
63 Wills Road
Macquarie Fields, New South Wales
Breeder: Graham Noel Brown, Baulkham Hills, Australia
Agent in Canada: Variety Rights Management
475 County Road 18
R.R. #2
Oxford Station, Ontario
K0G 1T0
Tel: 613-258-9015
Application Date: 2004-08-13
Application Number: 04-4319
Grant of Rights Date: 2008-10-24
Certificate Number: 3381
Date rights revoked: 2010-03-09

Variety Description

Varieties used for comparison: 'Kirimaji Double Blue Vein' (Double Wave Blue Velvet) and 'MP20' (Tiny Tunia Violet Ice)

Summary: 'MPD2' is a petunia variety which has double flowers with a smaller diameter than the flowers of 'Kirimaji Double Blue Vein'. The flowers of the reference variety 'MP20' are similar to 'MPD2' in main colour and veining but are single, rather than double. 'MPD2' differs from 'Kirimaji Double Blue Vein' in main colour of the upper side of the corolla.


PLANT: spreading growth habit
SHOOT: medium thickness, short to medium length, no anthocyanin colouration

LEAF: elliptic to circular shape, broad acute apex, no variegation, medium green on upper side, blistering absent

SEPAL: linear to obovate shape, no anthocyanin
FLOWER: double, funnel form
COROLLA LOBE: one colour on upper side, light blue violet main colour, very strongly conspicuous purple veins, very strong undulation of margin
COROLLA TUBE: dark violet on inner side, very strongly conspicuous veins

Origin & Breeding History: 'MPD2' was developed from a Petunia × hybrida breeding program located at the University of Sydney Plant Breeding Institute Cobbitty (PBIC), in Cobbitty, New South Wales, Australia. This vegetative breeding program is aimed at producing compact but spreading, small flowered petunia varieties. The parents 'X01.154.3' (female) and 'PKC27' (male) were crossed in December 2001. These parents were crossbreeds from the proprietary program. The new variety was selected from the F1 seedling population in October 2002 and was tested for uniformity and stability in tissue culture propagation. The initial selection criteria were for flower colour and form, early flowering and habit.

Tests & Trials: Trials for 'MPD2' were conducted in a polyhouse at Oxford Station, Ontario during the summer of 2006. The trials consisted of 15 plants of each variety, planted in 15 cm pots and spaced at approximately 30 cm apart on the bench. Observations and measurements were taken from 10 plants of each variety. Colour determinations were done using the 2001 Royal Horticultural Society (RHS) Colour Chart.

Comparison tables for 'MPD2' with reference varieties 'Kirimaji Double Blue Vein' and 'MP20'

Leaf length (cm)

  'MPD2' 'Kirimaji Double Blue Vein' 'MP20'
mean 2.67 3.16 2.56
std. deviation 0.45 0.21 0.30

Leaf width (cm)

  'MPD2' 'Kirimaji Double Blue Vein' 'MP20'
mean 1.01 1.65 0.86
std. deviation 0.24 0.24 0.21

Diameter of corolla (mm)

  'MPD2' 'Kirimaji Double Blue Vein' 'MP20'
mean 31.29 48.43 31.71
std. deviation 1.80 3.41 2.56

Main colour of corolla lobe (RHS)

  'MPD2' 'Kirimaji Double Blue Vein' 'MP20'
upper side 76B-C 84B-C 75A to 76A

Length of corolla tube (mm)

  'MPD2' 'Kirimaji Double Blue Vein' 'MP20'
mean 17.00 16.71 23.00
std. deviation 1.83 1.70 1.53

Main colour of corolla tube (RHS)

  'MPD2' 'Kirimaji Double Blue Vein' 'MP20'
inner side 79B 83A 79B

Click on image for larger view
Petunia: 'MPD2' (left) with reference variety 'MP20' (right)

Click on image for larger view
Petunia: 'MPD2' (left) with reference variety 'Kirimaji Double Blue Vein' (right)

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