47. Volume 14- Number 2 - IP Australia

PLANT VARIETIES JOURNAL 2001 VOL 14 NO. 2
breeding line 95420 is distinguished from ‘Siokra V-16i’ by
its segregation for the Ingard® gene. The pollen parent
‘Siokra V-16’ A is distinguished from ‘Siokra V-16i’ by the
absence of the Ingard® gene. This cross was the fourth
backcross of ‘Siokra V-16’ A onto a line transformed with
an Ingard® gene. The first cross was carried out at St.
Louis, USA and the F1 sent to quarantine at CSIRO Plant
Industry in Canberra, Australia where the first backcross
was carried out using ‘Siokra V-16’ A . Three subsequent
backcrosses using ‘Siokra V-16’ A as the recurrent parent
were carried out at ACRI. At all stages plants were screened
for presence of the Ingard® gene. Following the final
backcross, selfing was done and single plant selection
followed by progeny row and multiple environment trials
were carried out. Selection criteria: Ingard® trait, plant
habit, resistance to bacterial blight, resistance to
verticillium wilt, leaf hair, yield, lint % and fibre quality.
Propagation: by seed. Breeder: Mr PE Reid, CSIRO,
Narrabri, NSW.
Choice of Comparators ‘Siokra V-15i’ A was chosen
because it is the most similar variety with okra leaf shape,
very similar plant habit and the Ingard® gene. The parents
were not considered for the reasons stated above.
Comparative Trials Morphology trial location: Australian
Cotton Research Institute, Narrabri, NSW, 2000-01
summer. Conditions: field grown irrigated trial with
conventional management. Trial design: 30-entry trial in a
row and column design with four replicates and two rows x
14m plots. Measurements: morphological measurements on
10 plants from each plot. Fibre quality trial locations: 8 trial
locations from Warren, NSW to Emerald, QLD, 1999-2000
summer. Conditions: field grown irrigated trials with
conventional management. Trial design: 13-entry trial in a
row and column design with four replicates and three or
four row x 14m plots. Measurements: lint % and fibre
quality measurements taken on a 400g subsample from the
whole centre row harvest. Fibre quality was measured on a
Zellweger Uster HVI 900 instrument.
Prior Application and Sales
No prior application. First sold in Australia in Sep 2000.
Description: Peter Reid, CSIRO Plant Industry, Cotton Research Unit,
Narrabri, NSW.
Table 14 Gossypium varieties
‘Siokra V-16i’ *‘Siokra V-15i’ A
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FRUITING BRANCH FIRST INTERNODE (mm)
mean 129.1 106.1
std deviation 12.0 8.8
LSD/sig 16.0 P≤0.01
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PEDUNCLE LENGTH (mm)
mean 32.9 29.7
std deviation 2.7 3.9
LSD/sig 3.2 P≤0.01
____________________________________________________
STIGMA DISTANCE RELATIVE TO STAMENS (mm)
mean 2.6 4.6
std deviation 1.0 1.1
LSD/sig 1.1 P≤0.01
____________________________________________________
38
LINT %
mean 40.3 39.8
std deviation 1.21 1.32
LSD/sig 0.50 P≤0.01
____________________________________________________
‘Sicot 289i’
Application No: 2000/280 Accepted: 12 Sep 2000.
Applicant: CSIRO Plant Industry, Cotton Research Unit,
Narrabri, NSW.
Characteristics (Table 15, Figure 40) Plant: shape conical,
height medium, maturity late (180 days to mature), foliage
density medium. Leaf: shape palmate, pubescence of
midrib very slight, gossypol and nectary glands present.
Flower: colour of petals cream, stigma distance above
stamens (mean 1.9 mm). Boll: size medium, shape ovate,
pitting of surface fine, length of peduncle medium (mean
28.8 mm), prominence of tip medium, opening medium,
bract size large (47mm medium x 29mm). Seeds: density of
fuzz medium. Lint: proportion high (0.41), length medium
(30.1mm), strength high (31.8 g/tex), micronaire medium
(4.0). Disease: resistant to bacterial blight (Xanthomonas
campestris pv malvacearum), good tolerance to verticillium
wilt (Verticillium dahliae), good tolerance to fusarium wilt
(Fusarium oxysporum f. sp. vasinfectins). Transgenes:
Ingard® gene incorporated for lepidopteran insect control.
Origin and Breeding Controlled pollination: seed parent
breeding line 95418 x pollen parent ‘Sicot 189’ A in a
planned breeding program at the Australian Cotton
Research Institute (ACRI), Narrabri, NSW. The seed parent
breeding line 95418 is distinguished from ‘Sicot 289i’ by its
segregation for the Ingard® gene. The pollen parent ‘Sicot
189’ A is distinguished from ‘Sicot 289i’ by the absence of
the Ingard® gene. This cross was the fourth backcross of
‘Sicot 189’ A onto a line transformed with an Ingard® gene.
The first cross was carried out at St. Louis, USA and the F1
sent to quarantine at CSIRO Plant Industry in Canberra,
Australia where the first backcross was carried out using
‘Sicot 189’ A . Three subsequent backcrosses using ‘Sicot
189’ A as the recurrent parent were carried out at ACRI. At
all stages plants were screened for presence of the Ingard®
gene. Following the final backcross, selfing was done and
single plant selection followed by progeny row and multiple
environment trials were carried out. Selection criteria:
Ingard® trait, plant habit, resistance to bacterial blight,
resistance to verticillium wilt, resistance to fusarium wilt,
leaf hair, yield, lint % and fibre quality. Propagation: by
seed. Breeder: Mr PE Reid, CSIRO, Narrabri, NSW.
Choice of Comparators ‘Sicot 189i’ A was chosen because
it is the most similar variety with normal leaf shape, very
similar plant habit and the Ingard® gene. The parents were
not considered for the reasons stated above.
Comparative Trials Morphology trial location: Australian
Cotton Research Institute, Narrabri, NSW, 2000-01
summer. Conditions: field grown irrigated trial with
conventional management. Trial design: 30-entry trial in a
row and column design with four replicates and two rows x
14m plots. Measurements: morphological measurements on
10 plants from each plot. Fibre quality trial locations: 6 trial
locations from Narrabri, NSW to Emerald, QLD, 1999-
2000 summer. Conditions: field grown irrigated trials with