Abstract
SUMMARY A Brassica napus line that produces flowers with virtually no petals (Apetalous) was compared for its physiological significance with Marnoo, a related cultivar bearing conventional yellow petals. Experiments between 1984 and 1987 used different growth regulators, plant population densities and irrigation treatments. Apetalous allowed 30 % more short-wave radiation to reach the base of the inflorescence, and reflected only half as much radiation as Marnoo at peak flowering. This allowed leaves to persist and remain active for longer. Apetalous then consistently retained more seeds/pod, each of greater mean weight, at all heights within the crop canopy, resulting in substantially greater yields than Marnoo in most instances. At the highest population density, it retained productive secondary branches, whereas Marnoo had none. Irrigation after flowering increased the yields of both lines by allowing more seeds/pod to be retained, particularly at lower heights in the canopy. In Apetalous, however, even without irrigation, yields remained high. Apetalous does have larger flower parts, other than petals, which could contribute to the larger pods and seeds. This, combined with lower plant populations than Marnoo in some experiments, could have explained some of the effects seen, but the characteristic is worthy of further study in a range of genetic backgrounds and environments.
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Claims 9
Claim · model-written summary
The apetalous Brassica napus line let 30% more short-wave radiation reach the base of the inflorescence than Marnoo.
- Taxon
- Brassica napus
_Brassica_napus_-_Habit.jpg?width=60)
Brassica napuse0 - Material
- Apetalouse0
- Outcome
- short-wave radiation to reach the base of the inflorescencee1
- Direction
- moree1
- Value
- 30 %e1
- Comparator
- Marnooe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_Brassica_napus_-_Habit.jpg?width=500)
Verbatim
e0“A Brassica napus line that produces flowers with virtually no petals (Apetalous) was compared for its physiological significance with Marnoo, a related cultivar bearing conventional yellow petals”
e1“Apetalous allowed 30 % more short-wave radiation to reach the base of the inflorescence”
Claim · model-written summary
The apetalous line reflected only half as much radiation as Marnoo at peak flowering.
- Taxon
- Brassica napusBrassica napuse0
- Material
- Apetalouse0
- Outcome
- radiatione2
- Direction
- only half as muche2
- Comparator
- Marnooe2
- Setting
- peak floweringe2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A Brassica napus line that produces flowers with virtually no petals (Apetalous) was compared for its physiological significance with Marnoo, a related cultivar bearing conventional yellow petals”
e2“and reflected only half as much radiation as Marnoo at peak flowering”
Claim · model-written summary
The apetalous line allowed leaves to persist and remain active for longer.
- Taxon
- Brassica napusBrassica napuse0
- Outcome
- leaves to persist and remain activee3
- Qualifier
- for longere3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A Brassica napus line that produces flowers with virtually no petals (Apetalous) was compared for its physiological significance with Marnoo, a related cultivar bearing conventional yellow petals”
e3“This allowed leaves to persist and remain active for longer”
Claim · model-written summary
The apetalous line retained more seeds per pod at all heights within the crop canopy.
- Taxon
- Brassica napusBrassica napuse0
- Material
- Apetalouse4
- Outcome
- seeds/pode4
- Direction
- moree4
- Setting
- within the crop canopye4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A Brassica napus line that produces flowers with virtually no petals (Apetalous) was compared for its physiological significance with Marnoo, a related cultivar bearing conventional yellow petals”
e4“Apetalous then consistently retained more seeds/pod, each of greater mean weight, at all heights within the crop canopy”
Claim · model-written summary
The apetalous line retained seeds of greater mean weight at all heights within the crop canopy.
- Taxon
- Brassica napusBrassica napuse0
- Material
- Apetalouse4
- Outcome
- mean weighte4
- Direction
- greatere4
- Setting
- within the crop canopye4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A Brassica napus line that produces flowers with virtually no petals (Apetalous) was compared for its physiological significance with Marnoo, a related cultivar bearing conventional yellow petals”
e4“Apetalous then consistently retained more seeds/pod, each of greater mean weight, at all heights within the crop canopy”
Claim · model-written summary
The apetalous line had substantially greater yields than Marnoo in most instances.
- Taxon
- Brassica napusBrassica napuse0
- Material
- Apetalouse0
- Outcome
- yieldse5
- Direction
- substantially greatere5
- Qualifier
- in most instancese5
- Comparator
- Marnooe5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A Brassica napus line that produces flowers with virtually no petals (Apetalous) was compared for its physiological significance with Marnoo, a related cultivar bearing conventional yellow petals”
e5“resulting in substantially greater yields than Marnoo in most instances”
Claim · model-written summary
At the highest population density the apetalous line retained productive secondary branches, whereas Marnoo had none.
- Taxon
- Brassica napusBrassica napuse0
- Material
- Apetalouse0
- Treatment
- highest population densitye6
- Outcome
- productive secondary branchese6
- Direction
- retainede6
- Comparator
- Marnooe6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A Brassica napus line that produces flowers with virtually no petals (Apetalous) was compared for its physiological significance with Marnoo, a related cultivar bearing conventional yellow petals”
e6“At the highest population density, it retained productive secondary branches, whereas Marnoo had none”
Claim · model-written summary
Irrigation after flowering increased yields of both lines by allowing more seeds per pod to be retained.
- Taxon
- Brassica napusBrassica napuse0
- Treatment
- Irrigation after floweringe7
- Outcome
- yieldse7
- Direction
- increasede7
- Qualifier
- by allowing more seeds/pod to be retainede7
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A Brassica napus line that produces flowers with virtually no petals (Apetalous) was compared for its physiological significance with Marnoo, a related cultivar bearing conventional yellow petals”
e7“Irrigation after flowering increased the yields of both lines by allowing more seeds/pod to be retained, particularly at lower heights in the canopy”
Claim · model-written summary
Yields of the apetalous line remained high even without irrigation.
- Taxon
- Brassica napusBrassica napuse0
- Material
- Apetalouse7
- Outcome
- yieldse7
- Direction
- remained highe7
- Qualifier
- even without irrigatione7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A Brassica napus line that produces flowers with virtually no petals (Apetalous) was compared for its physiological significance with Marnoo, a related cultivar bearing conventional yellow petals”
e7“In Apetalous, however, even without irrigation, yields remained high”
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See all 42 papers →stage · yield · Brassica napus (oilseed rape)Positive and negative results
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See all 43 papers →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.