Plant Variety Journal - IP Australia

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Plant Varieties Journal Vol. 23 Number 4 top crossed with ‘Krichauff’. The aim of this program was to introgress Lr19 and yellow flour pigment from ‘Hilut#1’, and the Yr10 stripe rust gene (linked with brown glumes) from ‘Angas’ into the adapted variety ‘Krichauff’. The resultant F2 plants were sown in Feb 2003 and four F3 plants with brown glumes were harvested in Jun 2003 and analysed for their xanthophyll content. Two families were retained and back crossed with ‘Krichauff’. The process was repeated and in late 2003 a further back crossing to ‘Krichauff ‘occurred using plants that were brown chaffed and homozygous for the xanthophyll gene, Y. Seeds from this cross ‘Hilut#1’/’Angas’/’3*Krichauff’ were multiplied in pots in 2004 and planted into rows in the field at Jamestown in 2005. At maturity grain from now F2 derived F3 plants with brown glumes were submitted for xanthophyll tests and eleven lines containing gene Y were multiplied in a greenhouse over the summer of 2005/6. Replicated field trials were planted in 2006 and three lines found to be homozygous for brown glumes and high xanthophyll content were submitted to the National Rust Control Program for stem, leaf and stripe rust resistance screening. All three were resistant to the three rusts. These were multiplied over summer at the Waite Institute and the now F6 seed used to conduct replicated field trials in 2007, 2008 and 2009. Yield trialing has continued and one line, DC005, entered seed buildup as F9 prior to release. Acknowledgements: D Mares (University of Adelaide) for Hilut#1 and xanthphyll tests, H Bariana (Sydney University)for rust tests, T Rathjen and C Stone (University of Adelaide) for trials and seed multiplication. 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 Ear awnedness fully awned Plant seasonal type spring Ear glume colour brown Most Similar Varieties of Common Knowledge identified (VCK) Name Comments ‘Angas’ Parent, brown glumed, white flour ‘Krichauff’ Parent, white glumes, yellowish flour 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 ‘Both’ ‘Angas’ ‘Krichauff’ *Plant: growth habit erect to semi-erecterect to semi-erect erect to semi-erect Flag leaf: anthocyanin colouration of absent or very absent or very absent or very auricles weak weak weak Plant: frequency of plants with recurved very low to low high to very high low flag leaves *Time of: ear emergence medium early early to medium *Flag leaf: glaucosity of sheath weak to medium weak to medium weak to medium *Ear: glaucosity weak to medium weak weak to medium Culm: glaucosity of neck medium weak to medium weak to medium *Plant: length short to medium short to medium medium to long Page 250 of 322
Plant Varieties Journal Vol. 23 Number 4 *Straw: pith in cross section thin thin thin *Ear: shape in profile tapering tapering tapering *Ear: density medium lax medium Ear: length short to medium medium medium *Awns or scurs: presence awns present awns present awns present *Awns of scurs at tip of ear: length short to medium short to medium short to medium *Ear: colour coloured coloured white Apical rachis segment: hairiness of convex surface very weak to weak very weak to weak very weak to weak Lower glume: shoulder width medium narrow to medium medium slightly sloping to Lower glume: shoulder shape straight straight straight Lower glume: beak length short short to medium short to medium Lower glume: beak shape straight straight slightly curved Lowest lemma: beak shape straight straight straight *Grain: colour white white white *Seasonal type: spring type spring type spring type Characteristics Additional to the Descriptor/TG Organ/Plant Part: Context ‘Both’ ‘Angas’ ‘Krichauff’ Plant: stripe rust gene resistant Yr10 resistant Yr10 susceptible yr10 Plant: leaf rust reaction Lr19 resistant susceptible susceptible Page 251 of 322
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Plant Variety Journal - IP Australia

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