Abstract
THE EFFICACY of managed regimes used in high-cost, photoperiod facilities (PFs) is all important. Various photoperiod regimes were trialled to improve flowering from ≈ 90% treated clones and ≈ 70% treated stalks by reducing the proportion of meristems initiated but not emerged (IBNE). Two experiments in 2007 compared a 60 s/d declination from three commencing day lengths, 12 h 55 min, 13 h 10 min, and 13 h 25 min. Two experiments in 2008 compared declinations of 30, 45, and 60 s/d for the panicle development phase following an initiation declination of 60 s/d. In 2009, three experiments compared initiation and developmental declinations of 60 and 40 s/d, and an initiation and developmental declination of 60 and 20 s/d, respectively, with a drop of 30 min in day length after 28 day’s initiation. There were no differences among treatments in 2007. For clones, 87.9 and 84.4% flowered, while 62.3 and 56.7% of treated stalks produced usable panicles. However, 20.0 and 19.4% of stalks were IBNE. In PF(A) in 2008, flowering from 30 (70.6% treated stalks) vs 60 s/d (65.9%) and 30 vs 45 s/d (77.1%) developmental declinations were not significantly different but was for the 45 vs 60 s/d declinations. Meristems IBNE averaged 23.8%. On average 90.1% of clones flowered. In PF(B), the control (60 s/d) produced an anomalous result. The 45 and 30 s/d declinations did not differ, with 85.5 and 78.1% of treated stalks and 92.5% of clones flowering. In 2009, the 60/20 s/d declinations, separated by a 30 min day length decrease disappointed, with 52.8% stalks and 74.4% clones flowered. The 60/60 s/d (control) and 40/40 declinations did not differ significantly, producing 78.5% flowered stalks from 93.5% flowered clones, on average. Results for the 40 s/d regime, 81.6% flowered stalks and 14.7% IBNE, are the best results yet achieved. Significant differences were obtained among regimes for pollen fertility, but pollen fertility was not a limitation for cross pollination. Comparison of in-field vs managed PF flowering showed the superiority of the latter at 188 and 669%, in 2008 and 2009, respectively. Mean fuzz weight of PF crosses was lower than that of core crosses, but mean seed germination of non-germination tested PF crosses was equal to or better than germinated-tested core crosses.
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Claims 20
Claim · model-written summary
In 2007 there were no differences among photoperiod treatments in flowering.
- Taxon
- sugarcanet0
- Treatment
- 60 s/d declination from three commencing day lengthse1
- Outcome
- flowerede0
- Direction
- no_changeinferrede0
Not reportedComparator
Verbatim
t0“sugarcane”
e0“There were no differences among treatments in 2007. For clones, 87.9 and 84.4% flowered, while 62.3 and 56.7% of treated stalks produced usable panicles. However, 20.0 and 19.4% of stalks were IBNE.”
e1“Two experiments in 2007 compared a 60 s/d declination from three commencing day lengths, 12 h 55 min, 13 h 10 min, and 13 h 25 min”
Claim · model-written summary
In 2007 clones flowered at 87.9% and 84.4% across the two experiments.
Verbatim
t0“sugarcane”
e0“There were no differences among treatments in 2007. For clones, 87.9 and 84.4% flowered, while 62.3 and 56.7% of treated stalks produced usable panicles. However, 20.0 and 19.4% of stalks were IBNE.”
Claim · model-written summary
In 2007 treated stalks produced usable panicles at 62.3% and 56.7% across the two experiments.
Verbatim
t0“sugarcane”
e0“There were no differences among treatments in 2007. For clones, 87.9 and 84.4% flowered, while 62.3 and 56.7% of treated stalks produced usable panicles. However, 20.0 and 19.4% of stalks were IBNE.”
Claim · model-written summary
In 2007 stalks were IBNE at 20.0% and 19.4% across the two experiments.
Verbatim
t0“sugarcane”
e0“There were no differences among treatments in 2007. For clones, 87.9 and 84.4% flowered, while 62.3 and 56.7% of treated stalks produced usable panicles. However, 20.0 and 19.4% of stalks were IBNE.”
Claim · model-written summary
In PF(A) in 2008, the 30 s/d developmental declination did not differ from 60 s/d in flowering (70.6% vs 65.9%).
Verbatim
t0“sugarcane”
e0“In PF(A) in 2008, flowering from 30 (70.6% treated stalks) vs 60 s/d (65.9%) and 30 vs 45 s/d (77.1%) developmental declinations were not significantly different but was for the 45 vs 60 s/d declinations.”
Claim · model-written summary
In PF(A) in 2008, the 30 s/d developmental declination did not differ from 45 s/d in flowering (77.1%).
Verbatim
t0“sugarcane”
e0“In PF(A) in 2008, flowering from 30 (70.6% treated stalks) vs 60 s/d (65.9%) and 30 vs 45 s/d (77.1%) developmental declinations were not significantly different but was for the 45 vs 60 s/d declinations.”
Claim · model-written summary
In PF(A) in 2008, the 45 s/d developmental declination differed significantly in flowering from 60 s/d.
Not reportedComparatorDirection
Verbatim
t0“sugarcane”
e0“In PF(A) in 2008, flowering from 30 (70.6% treated stalks) vs 60 s/d (65.9%) and 30 vs 45 s/d (77.1%) developmental declinations were not significantly different but was for the 45 vs 60 s/d declinations.”
Claim · model-written summary
In PF(A) in 2008, meristems initiated but not emerged averaged 23.8%.
Verbatim
t0“sugarcane”
e0“Meristems IBNE averaged 23.8%”
Claim · model-written summary
In PF(A) in 2008, on average 90.1% of clones flowered.
Verbatim
t0“sugarcane”
e0“On average 90.1% of clones flowered”
Claim · model-written summary
In PF(B), the 45 and 30 s/d declinations did not differ in flowering, with 85.5% of treated stalks flowering at 45 and 30 s/d and 92.5% of clones flowering.
- Taxon
- sugarcanet0
- Treatment
- 45 and 30 s/d declinationse0
- Outcome
- floweringe0
- Direction
- no_changeinferrede0
- Value
- 85.5e0
- Qualifier
- 78.1% of treated stalks and 92.5% of clonese0
- Setting
- PF(B)e0
Not reportedComparator
Verbatim
t0“sugarcane”
e0“In PF(B), the control (60 s/d) produced an anomalous result. The 45 and 30 s/d declinations did not differ, with 85.5 and 78.1% of treated stalks and 92.5% of clones flowering”
Claim · model-written summary
In PF(B) the control (60 s/d) produced an anomalous flowering result.
Verbatim
t0“sugarcane”
e0“In PF(B), the control (60 s/d) produced an anomalous result. The 45 and 30 s/d declinations did not differ, with 85.5 and 78.1% of treated stalks and 92.5% of clones flowering”
Claim · model-written summary
In 2009 the 60/20 s/d declinations disappointed, with 52.8% of stalks and 74.4% of clones flowering.
- Taxon
- sugarcanet0
- Treatment
- 60/20 s/d declinationse0
- Outcome
- flowerede0
- Value
- 52.8%e0
- Qualifier
- 74.4% clonese0
Not reportedComparatorDirection
Verbatim
t0“sugarcane”
e0“In 2009, the 60/20 s/d declinations, separated by a 30 min day length decrease disappointed, with 52.8% stalks and 74.4% clones flowered”
Claim · model-written summary
In 2009 the 60/60 s/d control and 40/40 declinations did not differ significantly, with 78.5% of stalks flowering.
Verbatim
t0“sugarcane”
e0“The 60/60 s/d (control) and 40/40 declinations did not differ significantly, producing 78.5% flowered stalks from 93.5% flowered clones, on average”
Claim · model-written summary
The 40 s/d regime gave 81.6% flowered stalks, the best flowering result yet achieved.
Not reportedComparator
Verbatim
t0“sugarcane”
e0“Results for the 40 s/d regime, 81.6% flowered stalks and 14.7% IBNE, are the best results yet achieved”
Claim · model-written summary
The 40 s/d regime gave 14.7% meristems initiated but not emerged.
Verbatim
t0“sugarcane”
e0“Results for the 40 s/d regime, 81.6% flowered stalks and 14.7% IBNE, are the best results yet achieved”
Claim · model-written summary
Pollen fertility differed significantly among photoperiod regimes.
Not reportedComparatorDirection
Verbatim
t0“sugarcane”
e0“Significant differences were obtained among regimes for pollen fertility, but pollen fertility was not a limitation for cross pollination”
Claim · model-written summary
Pollen fertility was not a limitation for cross pollination.
Verbatim
t0“sugarcane”
e0“Significant differences were obtained among regimes for pollen fertility, but pollen fertility was not a limitation for cross pollination”
Claim · model-written summary
Managed photoperiod flowering was superior to in-field flowering, by 188% in 2008 and 669% in 2009.
Verbatim
t0“sugarcane”
e0“Comparison of in-field vs managed PF flowering showed the superiority of the latter at 188 and 669%, in 2008 and 2009”
Claim · model-written summary
Mean fuzz weight of PF crosses was lower than that of core crosses.
Verbatim
t0“sugarcane”
e0“Mean fuzz weight of PF crosses was lower than that of core crosses, but mean seed germination of non-germination tested PF crosses was equal to or better than germinated-tested core crosses”
Claim · model-written summary
Seed germination of non-germination-tested PF crosses was equal to or better than that of germination-tested core crosses.
Verbatim
t0“sugarcane”
e0“Mean fuzz weight of PF crosses was lower than that of core crosses, but mean seed germination of non-germination tested PF crosses was equal to or better than germinated-tested core crosses”
The same questions in other papers
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2 papers in the same direction as this paper
- positive
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Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.