Plant Variety Journal - IP Australia

Details of Application
Application Number 2007/157
Variety Name ‘Poise’
Genus Species Ptilotus nobilis
Common Name Ptilotus
Synonym Nil
Accepted Date 2 Aug 2007
Applicant The University of Queensland, Brisbane, QLD
Agent N/A
Qualified Person Dion Harrison
Plant Varieties Journal Vol. 21 No.3
Details of Comparative Trial
Location Gatton, QLD, Australia.
Descriptor Ptilotus (Ptilotus) PBR PTIL.
Period Feb – Aug 2008.
Conditions Plants were propagated by tissue culture. Plants were grown in
175mm pots in a soil-less medium under greenhouse conditions,
fertilised with controlled release fertiliser and drip irrigated.
Trial Design Randomised block design, 12 blocks with unequal replicates.
Measurements Stem length: the longest flowering stem measured from the base
of the plant to tip of inflorescence. Leaf descriptions: the fifth
leaf below the inflorescence on the longest stem was used to
evaluate the state of expression for all leaf attributes.
Inflorescence descriptions: the states of expression for all
inflorescence attributes were determined on the longest
flowering stem. Inflorescence width was measured at the widest
part of the inflorescence. Bract descriptions: the longest
flowering stem was used to determine the state of bract
expression. The most mature bracts that form an angle of less
than 45 degrees with the central axis of the inflorescence were
evaluated as these bracts were most visually prominent.
RHS Chart - edition 1966.
Origin and Breeding
Seed was derived from controlled pollination between cream-pink flowering genotypes
obtained from a population of Ptilotus nobilis with brownish cream to brownish pink
coloured inflorescences. The seed was initiated into tissue culture on 9 Nov 2004.
Resulting seedlings were transferred to multiplication medium on 29 Nov 2004.
Genotypes exhibiting vigorous growth and high multiplication rates were maintained in
tissue culture. After approximately 10 subcultures, plantlets were deflasked on 4 May
2005 and grown in the nursery. Evaluation of mature specimens was conducted on 13 Jul
2005. Poise was selected on the basis of a unique and attractive two-toned inflorescence
colour (cream to tan/pink) and upright plant form. Breeders: Margaret Johnston, Melinda
Perkins, Dion Harrison, Daryl Joyce.
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