44. Volume 15- Number 2 - IP Australia

PLANT VARIETIES JOURNAL 2002 VOL 15 NO. 2
Table 7 (continued)
LEAF COLOUR (RHS 2001)
upper side 189A 137A
lower side 147B 146B
____________________________________________________
FLOWER BUD HEIGHT (mm) prior to opening
mean 8.4 7.3
std deviation 0.7 0.4
LSD/sig 0.6 P≤0.01
____________________________________________________
FLOWER BUD WIDTH (mm) prior to opening
mean 8.4 7.3
std deviation 0.7 0.3
LSD/sig 0.7 P≤0.01
____________________________________________________
FLOWER
type semi-double double
____________________________________________________
RAY FLORETS
number of rows 4 to 5 8 to 10
number of florets 60-70 >100
____________________________________________________
RAY FLORET LENGTH TO WIDTH RATIO
mean 4.4 3.6
std deviation 0.4 0.3
LSD/sig 0.3 P≤0.01
____________________________________________________
RAY FLORET COLOUR (RHS 2001)
at first opening (when ray floret attitude is semi-erect)
58B
63C
fully open (when ray floret attitude is horizontal)
inner florets 58B N57D
outer florets 58D 69D
aged (when ray floret attitude is reflexed)
inner florets 58B N57D
outer florets 69D 69D
____________________________________________________
Avena sativa
Oats
‘Possum’
Application No: 2001/236 Accepted: 17 Sep 2001
Applicant: Minister for Agriculture, Food and Fisheries,
Adelaide, SA.
Characteristics (Table 8, Figure 55) Plant: growth habit
intermediate, length (stem and panicle) very short, maturity
medium, seasonal type spring. Stem: hairiness of
uppermost node present, intensity of hairiness of uppermost
node absent or very weak. Leaf: hairiness of margins of leaf
blade below the flag leaf absent. Inflorescence: orientation
of branches equilateral, attitude of branches semi erect,
attitude of spikelets pendulous, length of glumes medium.
Seed: husk present, colour yellow, glaucosity of lemma of
primary grain absent.
Origin and Breeding Controlled pollination: seed parent
ND863468 x first pollen parent OX82059-58-10 in 1990.
The F1 from this cross was then crossed to the second
pollen parent, ‘Carrolup’ A in 1991. The seed parent is
characterised by late maturity and small seed size. The first
pollen parent was characterised by tall plant type. The cross
OX82059 is seed parent ‘Mortlock’ x pollen parent
‘Echidna’. The second pollen parent is also characterised by
tall plant type. Hybridisation took place at the Northfield
Research Laboratories, Adelaide, SA. From this cross,
panicles were selected from F3 plots at Turretfield Research
Centre (located near Rosedale, SA) in 1992. Selection
number seven was chosen in 1998 after six cycles of
selection on the basis of grain yield and grain quality.
Selection criteria: grain yield, hectolitre weight, screenings
percentage, 1000 grain weight, groat percentage, protein
and oil content. Propagation: seed. Breeder: Dr. Pamela
Zwer and the Oat Breeding Team of the South Australian
Research and Development Institute, Waite Campus,
Urrbrae, SA.
Choice of Comparators Grouping characteristics used in
identifying the most similar varieties of common
knowledge were – Plant length: short, End use: milling. On
the basis of these grouping characteristics, the following
comparator variety was included in the trial: ‘Echidna’.
‘Euro’ was included as it is derived from the same cross as
OX82059-58-10. ‘Mortlock’ was included as a milling
quality variety. It is however, medium in plant height.
‘Potoroo’ was included as a short variety. The pollen parent
‘Carrolup’ A was not included as it is tall in plant height.
Comparative Trial Location: Kingsford Research Centre,
SA (Latitude 34º33′ Longitude 138º46′, elevation 120m),
winter/spring 2001. Conditions: trial conducted in the field,
sown on 29 Jun, fertiliser, herbicides and insecticides
applied as required. Trial design: three replicates of each
variety were sown in plots 5m x 1.3m arranged in a
randomised block design. Measurements: from twenty
plants at random. One sample per plant.
Prior Applications and Sales Nil.
Description: Suzanne Hoppo, SARDI, Adelaide, SA .
Table 8 Avena varieties
‘Possum’ *‘Echidna’ *‘Euro’ *‘Mortlock’ *‘Potoroo’
______________________________________________________________________________________________________________
PLANT – GROWTH HABIT
intermediate intermediate semi-erect intermediate intermediate
______________________________________________________________________________________________________________
LEAF BLADE – HAIRINESS OF MARGINS OF LEAF BELOW FLAG LEAF
absent weak weak very weak weak
______________________________________________________________________________________________________________
TIME OF PANICLE EMERGENCE
medium medium medium early medium
______________________________________________________________________________________________________________
22