Plant Variety Journal - IP Australia

Plant Varieties Journal Vol. 23 Number 4
glass house at the Waite institute in 2001 and stored during 2002 and 2003. This and
all subsequent seed was multiplied by self pollination. The doubled haploids were
grown in a field nursery at Roseworthy Campus, University of Adelaide during 2004
and assessed for grain yield, rust resistance and plant type. The doubled haploid TX-
99-4D-20 was identified and assessed for grain yield and rust resistance at 7, 14 and
20 sites, respectively in 2005, 2006 and 2007. In 2006, 50 single head selections were
taken from a single plot of TX99-4D-20 and were grown over summer at Roseworthy
Campus, University of Adelaide. In 2007 these single selections were assessed
individually for plant type, rust resistance and CCN resistance. The 34 surviving
selections were bulked and renamed TSA0219. This line was assessed for grain yield,
rust resistance, CCN resistance and physical grain quality at 22 sites by AGT and 20
sites by the National Variety Trial system across Australia in 2008 and 2009.
Choice of Comparators Characteristics used for grouping varieties to identify the most similar
Variety of Common Knowledge
Organ/Plant Part Context State of Expression in Group of Varieties
Plant growth seasonal type spring
Anthers colour white
Ear presence of awns fully awned
Ear colour white
Most Similar Varieties of Common Knowledge identified (VCK)
Name
Comments
‘HAWKEYE’
new release.
‘TAHARA’
widely grown.
Varieties of Common Knowledge identified and subsequently excluded
Variety Distinguishing Characteristics State of Expression in
Candidate Variety
State of Expression in
Comparator Variety
‘Rufus’ Ear presence of awns fully awned tip awned
‘JAYWICK’ Ear attitude at maturity random angles all recurved to about
150 deg
‘SPEEDEE’ Lower glume hairiness absent hairy
‘SPEEDEE’ Plant CCN resistance resistant susceptible
‘SPEEDEE’ Plant stripe rust reaction moderately resistant susceptible to very
susceptible
‘TREAT’ Plant height semi-dwarf tall
‘TICKIT’ Plant time of ear emergenceearly medium
Variety Description and Distinctness - Characteristics which distinguish the candidate from one or
more of the comparators are marked with a tick.
Organ/Plant Part: Context ‘Chopper’ ‘HAWKEYE’ ‘TAHARA’
*Ploidy: hexaploid hexaploid hexaploid
*Plant: growth habit intermediate intermediate intermediate
Plant: frequency of plants with recurved
flag leaves
Flag leaf: anthocyanin colouration of
auricles
medium
weak to medium
high to very high very high
absent or very
weak
absent or very
weak
Page 242 of 322