Plant Variety Journal - IP Australia

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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
Plant Varieties Journal Vol. 23 Number 4 *Time of: ear emergence very early to early medium medium *Flag leaf: glaucosity of sheath strong weak to medium weak to medium Awn: anthocyanin colouration very weak to absent or very absent or very weak weak weak Anthers: anthocyanin colouration absent or very absent or very absent or very weak weak weak Flag leaf: length of blade medium medium to long medium to long Flag leaf: width of blade broad narrow medium Ear: glaucosity very strong medium to strong medium *Stem: density of hairiness of neck medium to strong medium medium to strong *Plant: length very short to short long long *Ear: distribution of awns fully awned fully awned fully awned *Awns above the tip of ear: length short to medium short to medium short to medium *Lower glume: length of first beak short short to medium short to medium absent or very absent or very absent or very Lower glume: size of second beak small small small *Lower glume: hairiness on external surface absent present absent Straw: pith in cross section thin thin thin Ear: colour white white white Ear: density medium medium to dense medium Ear: length excluding awns short to medium medium medium Ear: width in profile view Narrow to medium to broad medium to broad medium *Seasonal type: spring type spring type spring type Statistical Table Organ/Plant Part: Context ‘Chopper’ ‘HAWKEYE’ ‘TAHARA’ Plant: height (cm) Mean 105.70 125.80 132.80 Std. Deviation 4.74 4.35 4.41 LSD/sig 17.9 P≤0.01 P≤0.01 Flag leaf blade: length (mm) Mean 173.80 186.50 179.90 Std. Deviation 25.14 18.67 21.19 LSD/sig ns ns ns Flag leaf blade: width (mm) Mean 17.60 15.80 16.50 Std. Deviation 1.63 1.08 1.68 LSD/sig 2.0 ns ns Flag leaf sheath: length (mm) Page 243 of 322
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Plant Variety Journal - IP Australia

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