Plant Variety Journal - IP Australia

Details of Application
Application Number 2006/103
Variety Name ‘Korstarnow’
Genus Species Rosa hybrid
Common Name Rose
Synonym Nil
Accepted Date 21 Jul 2006
Applicant W. Kordes’ Sohne Rosenschulen GmbH & Co KG, Klein
Offenseth-Sparrieshoop, Germany
Agent Treloar Roses Pty Ltd, Portland, VIC
Qualified Person Brian Hanger
Details of Comparative Trial
Overseas Testing Bundessortanamt
Authority
Overseas Data ROS 2285
Reference Number
Location Pruistelle Rethmar, Germany. Local observation at Portland,
VIC
Descriptor Rose (Rosa hybrid) TG/11/7.
Period 2003.
Conditions The comparative study was conducted at Portland (Latitude
38.15S, Longitude 141.37E), VIC. The roses were maintained
in the open and grown in a well structured loamy clay soil.
Sound farm management practices ensured the plants grew to
their full potential with minimum stress and under high health
conditions. ‘Korstarnow’ was budded in early summer onto
well established 10 month-old Rosa multiflora rootstock.
Examination was conducted in mid autumn 2008 on one and
two year old budded plants growing in double rows along
with other varieties of Kordes roses.
Trial Design Observations and measurements were taken from a minimum
of ten plants, selected at random in mid autumn.
Measurements Measurements made on terminal leaflet of first seven-leaflet
leaf down flower stem, flower diameter when first fully open,
and sepal length excluded leafy extension if present.
RHS Chart - edition 1986
Origin and Breeding
Controlled pollination: in May 1993 Seed parent unnamed seedling was crossed with
pollen parent ‘Noaschnee’. Hips produced remained on bush until Oct (autumn) when
harvested and shelled. In Feb 1994 seeds were planted under controlled greenhouse
conditions: germination commenced in Feb, and seedlings first bloomed in Apr
(Northern Hemisphere). Out of this seedling population, the best seedlings were
selected for further trials. From these the seedling, now known as ‘Korstarnow’, was
selected for further testing. This new variety was multiplied in number by vegetative
propagation via shoot cuttings, flowered for over five generations and appeared
genetically stable. Selection criteria: improved garden rose variety. Breeding directed
by William Kordes, of W.Kordes’ Sohne Rosenschulen GMBH & Co KG,
Sparrieshoop,Germany.
Page 429 of 550
Plant Varieties Journal Vol. 21 No.3