53. Volume 13- Number 1 - IP Australia

DESCRIPTIONS
PLANT VARIETIES JOURNAL 2000 VOL 13 NO. 1
Table 52b Trifolium varieties
Rust resistance trial
‘Lightning’ *‘Laser’ *‘Leeton’ *‘Maral’ *‘Felix’ *‘Stemher’ *‘Lupers’ *‘Archibald’
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RUST RESISTANCE (rating)
mean 8.0 6.0 3.5 6.75 7.25 6.25 7.75 6.25
std deviation 0.8 0.5 1.0 0.5 0.5 0.9 0.9 1.6
LSD/sig 1.3 P≤0.01 P≤0.01 ns ns P≤0.01 ns P≤0.01
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Trifolium subterraneum subsp brachycalycinum
Subterranean Clover
‘Antas’
Application No: 1999/147 Accepted: 16 Mar 2000.
Applicant: Istituto Sperimentale per le Colture
Foraggere, Lodi, Italy.
Agent: SEEDCO, Hilton, SA.
Characteristics (Table 53, Figure 54) Seedling: moderately
upright, medium to large, vigorous. Plant: dense, spreading,
prostrate to semi-prostrate, late maturing. Stem: glabrous
with rare hairs, green, some red (anthocyanin) pigmentation
where exposed to sun in spring. Petioles: sparsely to
moderately pubescent, green or with red pigmentation as
for stems. Leaf: large, moderately pubescent lower, sparsely
pubescent upper surface. Leaf mark: pale green crescent
and arms (C 1 A 1-2 type, Nicholls et al, 1996), but crescent
may be faint or absent in some stages, no fleck or flush.
Stipules: green with lower red pigmented veins. Peduncle:
medium to long, moderately pubescent, green or red
pigmented where exposed to sun. Inflorescence: spikelet of
4 to 5 florets, white to pink. Seed: large, black or dark
purplish-brown. Burr: burial poor, calyx teeth moderately
pubescent.
Origin and Breeding Phenotypic selection: selection from
a variable population designated as EP 19, segregating for
flowering time, growth habit and leaf markers. Segregates
were isolated, multiplied and trialed over 10 years and
tested for persistance and seed yield in Sardinia. A number
of elite lines were selected and then tested in various trials
in Western Australia. One line, EP 19 brachy E was found
to produce more herbage and burr, to have a higher
percentage of hard seed at harvest and to regenerate more
strongly than ‘Clare’. EP 19 brachy E was then used to
develop the uniform single line, ‘Antas’ through single plant
selection. Selection criteria: winter vigour, dry matter yield,
seed and burr yield, regeneration, persistence. Propagation:
by seed. Breeder: Dr Efisio Piano and staff, Istituto
Sperimentale per le Colture Foraggere, Lodi, Italy.
Choice of Comparators ‘Rosedale’, ‘Clare’ and ‘Nuba’ A
were initially considered for the comparative trial as these
are the only commonly available varieties of Trifolium
subterraneum ssp brachycalicinum. ‘Rosedale’ was
excluded as a comparator, as it is clearly distinguishable
from ‘Antas’ in having cream to white seeds (‘Antas’ has
dark purplish-brown to black seeds) and flowers over three
weeks earlier than ‘Antas’. ‘Clare’ and ‘Nuba’ A have
similar seed colour to and in most circumstances flower
within 10 days of ‘Antas’, and were therefore chosen as
comparators. The original source material (EP 19) was not
considered because it is a heterogenous population and does
not have well-defined C 1 A 1-2 type leaf markings.
Comparative Trial Comparators: ‘Clare’, ‘Nuba’ A .
Location: Currency Creek, about 75km SSE of Adelaide,
SA, between Jun and Nov 1999. Conditions: trial conducted
in the field. The soil was a moderately fertile, free draining
sandy loam of approximately pH 6. A single spring
irrigation of approximately 40mm rainfall equivalent was
applied in mid Oct to allow plots to mature with minimum
water stress. No chemical or fertiliser treatments were used
and plots were hand weeded as required. Trial design: a
randomised complete block with 4 replicates, each of 10
plants. Plants were seeded and raised in Jiffy 7 pellets in a
shadehouse, and then transplanted into the field at
approximately 4 weeks of age in late Jun, 1999. Each
replicate was comprised of 10 plants in 4 rows, with 20 cm
between plants and 50 cm between rows. Measurements:
from all plants.
Prior Applications and Sales Nil.
Description: Andrew W.H. Lake, Pristine Forage Technologies, Daw
Park, SA.
Table 53 Trifolium varieties
‘Antas’ *‘Clare’ *‘Nuba’ A
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DAYS TO FIRST FLOWER – days from germination in early
June to first open floret
mean 126.23 122.75 129.23
std deviation 0.287 0.661 0.320
LSD/sig 0.87 P≤0.01 P≤0.01
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WINTER PETIOLE COLOR/PIGMENTATION
green red-purple red-purple
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PROXIMAL ANTHOCYANIN FLUSH ON LEAFLET
absent present absent
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LEAF MARK TYPE (Nicholls et al, 1996)*
C 1 A 1-2 C 3 A 2-3 C 1 A 2
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LEAF MARK PROMINENCE
faint prominent faint
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FLORET COLOUR
white or pink white white
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* Nicholls P.G.H., Collins W.J. and Barbetti M.J. (1996).
Registered cultivars of subterranean clover.
Bulletin number 4327, Agriculture Western Australia.
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