44. Volume 15- Number 2 - IP Australia

DESCRIPTIONS
PLANT VARIETIES JOURNAL 2002 VOL 15 NO. 2
1 The method is discussed in Kammholz S.J., Sutherland M.W. and
Banks P.M. 1996. Improving the efficiency of haploid wheat
production mediated by wide crossing. SABRAO Journal. 28(1): 37-
46.
Choice of Comparators Grouping characteristics used in
identifying the most similar varieties of common
knowledge were – Time of maturity medium, growth habit
semi-erect and similar agroecological adaptation. On the
basis of these grouping characteristics ‘Pelsart’, ‘Batavia 2’
and ‘Sunco’ were included in the trial. The seed (nonrecurrent)
parent ‘Pelsart’ is a current medium maturing
variety, and the pollen (recurrent) parent ‘Batavia’ is a
current slow-maturing variety, reselected and renamed as
‘Batavia 2’. Both have good agronomic performance in
their agroecological range, and good export milling and
baking quality characteristics. ‘Sunco’ has similar maturity,
plant growth habit and agroecological adaptation to
‘QT8750’.
Comparative Trial Location: Wellcamp Farm, Wellcamp,
Jondaryan shire, QLD, Jul – Nov 2001. Conditions: plants
were raised in well-fertilised, irrigated soil in open beds.
Trial design: single row plots of approximately 200 plants
each variety, with two different seed sources (representing
different generations) of ‘QT8750’, arranged in a
randomised block with 10 replications. Metric
measurements: taken from 5 specimens selected at random
from each of six plots.
Prior Applications and Sales Nil.
Description: Tony Done, Leslie Research Centre, Department of Primary
Industries, Toowoomba, QLD.
Table 44 Triticum varieties
‘QT8750’ *‘Batavia 2’*‘Sunco’ *‘Pelsart’
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GROWTH STAGE (5/10/2001)
mean 55 50 53 51
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FLAG LEAF: ANTHOCYANIN COLOURATION OF
AURICLES (26/8/2001 to 8/10/2001)
absent or strong absent or absent or
very weak
very weak very weak
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PLANT: HEIGHT (to ear tip) (cm)
mean 81 89 77 78
std deviation 2.0 3.3 2.2 2.8
LSD/sig 4.3 P≤0.01 ns ns
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EAR: INTERNODE LENGTH (mean of six central internodes
of ear) (mm)
mean 5.1 5.1 4.6 4.7
std deviation 0.22 0.22 0.19 0.17
LSD/sig 0.17 ns P≤0.01 P≤0.01
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EAR: LENGTH (excluding awns) (mm)
mean 116 120 96 97
std deviation 4.1 4.7 4.1 4.0
LSD/sig 4.3 ns P≤0.01 P≤0.01
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EAR: GLAUCOSITY (8/10/2001)
strong strong weak to weak
medium
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AWN: LENGTH (at ear tip) (mm)
mean 54 53 45 45
std deviation 4.3 2.8 4.1 3.6
LSD/sig 3.3 ns P≤0.01 P≤0.01
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LOWER GLUME: BEAK LENGTH (mm)
mean 3.5 3.8 6.2 4.9
std deviation 0.44 0.57 0.88 0.54
LSD/sig 0.63 ns P≤0.01 P≤0.01
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‘QT9050’
Application No: 2001/323 Accepted: 27 May 2002.
Applicant: The State of Queensland through its
Department of Primary Industries Brisbane, QLD, and
Grains Research and Development Corporation, Barton,
ACT.
Characteristics (Table 45, Figure 51) Plant: growth habit
semi-erect during tillering, height medium (mean 86cm),
Flag leaf: attitude recurved to strongly recurved,
anthocyanin colouration of auricles absent or very weak,
glaucosity of sheath medium. Stem: pith in cross section
thin to solid. Ear: glaucosity medium, shape in profile
parallel, density medium to dense (mean internode length
4.3mm), length medium (mean 98mm), colour white, awns
present. Awns: length medium (mean 51mm). Lower
glume: beak length short to medium (mean 5.3mm). Grain:
colour white, texture hard. Time of maturity: medium.
Seasonal type: spring type. Disease resistance: very tolerant
and moderately resistant to root lesion nematode (RLN,
Pratylenchus thornei).
Origin and Breeding Controlled pollination: seed parent
92-349 (F 1 of GS50A/2*Cunningham//Janz) x pollen parent
‘Cunningham’. The cross was made in 1993 at the
Queensland Wheat Research Institute (QWRI), the female
parent putatively having tolerance and resistance to root
lesion nematodes (Pratylenchus thornei) derived from
GS50A. The F 2 and succeeding generations were grown in
plant breeding trials at Wellcamp Farm, Wellcamp, and at
various trial sites in the northern wheat-growing region, in
1994 – 1996. The selected line designated as ‘QT9050’ was
evaluated in strain and regional trials, a range of disease
resistance and tolerance tests, and in milling and baking
tests in 1997 – 2001. It was also evaluated in the 2000
Disease Progress Nurseries of the Plant Breeding Institute,
Cobbitty, NSW. ‘QT9050’ was finally selected for release
on the basis of the combined results from all of these.
‘QT9050’ was developed as a typically medium maturing
winter-sown wheat well adapted to the northern wheatgrowing
region of Australia. It is very tolerant and
moderately resistant to root lesion nematodes (Pratylenchus
thornei). It appears to have good quality characteristics.
Selection criteria: high yield, good agronomic
characteristics, high disease resistance and tolerance with
particular reference to root lesion nematode (RLN,
Pratylenchus thornei), and desirable export quality.
Propagation: seed produced by self-pollination through at
least two generations. Breeders: J A Sheppard and J P
Thompson, Department of Primary Industries, Toowoomba,
QLD.
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