Abstract
Enzymes controlling biosynthesis of fatty acids in the oil of soybean [ Glycine max (L.) Merr.] seeds are sensitive to temperature during the time of oil deposition. Soybean strains have been developed with low levels of linolenic acid (18:3) in an effort to improve oil flavor and stability. This study was conducted to determine the response of fatty acid composition in normal and low linolenic acid soybean strains to planting date, a production variable that may result in different temperatures during oil deposition. ‘Century’, C1640, and 9509 (three genotypes differing in linolenic acid due to alleles at the fan locus) were planted at four or five dates in each of 5 yr near West Lafayette, IN. Dates when 95% of the pods were mature and the fatty acid composition of the oil were determined for each plot. Fatty acid composition was not affected by planting date in either 1986 or 1990. In 1987 and 1988, levels of palmitic acid tended to decrease slightly and levels of stearic acid tended to increase slightly with successively later planting dates. From 1987 through 1989, linolenic acid was affected more than the other fatty acids by planting date. Regression of linolenic acid content on average maximum daily air temperature from 0 to 20 d prior to maturity demonstrated that 18:3 decreased 4.9 and 3.0 g kg −1 for each 1 °C increase in temperature for Century and C1640, respectively. The data demonstrate that late planting in Indiana should not result in substantially increased levels of linolenic acid in strains containing the fan allele.
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Claims 7
Claim · model-written summary
Planting date did not affect fatty acid composition in 1986 or 1990.
- Taxon
- soybean
Glycine maxt0 - Treatment
- planting datee0
- Outcome
- Fatty acid compositione0
- Direction
- not affectede0
- Qualifier
- 1986 or 1990e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Fatty acid composition was not affected by planting date in either 1986 or 1990”
t0“Soybean Strains”
Claim · model-written summary
Palmitic acid levels tended to decrease slightly with later planting in 1987 and 1988.
- Taxon
- SoybeanGlycine maxt0
- Treatment
- successively later planting datese0
- Outcome
- levels of palmitic acide0
- Direction
- decrease slightlye0
- Qualifier
- 1987 and 1988e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In 1987 and 1988, levels of palmitic acid tended to decrease slightly and levels of stearic acid tended to increase slightly with successively later planting dates”
t0“Soybean Strains”
Claim · model-written summary
Stearic acid levels tended to increase slightly with later planting in 1987 and 1988.
- Taxon
- SoybeanGlycine maxt0
- Treatment
- successively later planting datese0
- Outcome
- levels of stearic acide0
- Direction
- increase slightlye0
- Qualifier
- 1987 and 1988e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In 1987 and 1988, levels of palmitic acid tended to decrease slightly and levels of stearic acid tended to increase slightly with successively later planting dates”
t0“Soybean Strains”
Claim · model-written summary
From 1987 through 1989, planting date affected linolenic acid more than other fatty acids.
- Taxon
- SoybeanGlycine maxt0
- Treatment
- planting datee0
- Outcome
- linolenic acide0
- Direction
- affected moree0
- Comparator
- other fatty acidse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“From 1987 through 1989, linolenic acid was affected more than the other fatty acids by planting date”
t0“Soybean Strains”
Claim · model-written summary
Century linolenic acid content declined 4.9 g kg −1 for each 1 °C increase in maximum daily air temperature.
- Taxon
- SoybeanGlycine maxt0
- Material
- Centurye0
- Outcome
- 18:3e0
- Direction
- decreasede0
- Value
- 4.9e0
- Qualifier
- for each 1 °C increase in temperaturee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“18:3 decreased 4.9 and 3.0 g kg −1 for each 1 °C increase in temperature for Century and C1640, respectively”
t0“Soybean Strains”
Claim · model-written summary
C1640 linolenic acid content declined 3.0 g kg −1 for each 1 °C increase in maximum daily air temperature.
- Taxon
- SoybeanGlycine maxt0
- Material
- C1640e0
- Outcome
- 18:3e0
- Direction
- decreasede0
- Value
- 3.0 g kg −1e0
- Qualifier
- for each 1 °C increase in temperaturee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“18:3 decreased 4.9 and 3.0 g kg −1 for each 1 °C increase in temperature for Century and C1640, respectively”
t0“Soybean Strains”
Claim · model-written summary
Late planting in Indiana should not substantially increase linolenic acid in strains with the fan allele.
- Taxon
- SoybeanGlycine maxt0
- Gene
- fan allelee0
- Outcome
- late planting in Indiana should not result in substantially increased levels of linolenic acide0
- Setting
- Indianae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“late planting in Indiana should not result in substantially increased levels of linolenic acid in strains containing the fan allele”
t0“Soybean Strains”
The same questions in other papers
sowing time · quality: oil · Glycine max (soybean)Positive and negative results
11 papers in the same direction as this paper · 6 in the opposite direction
- positive
- positive
- positive
14 papers more in this group
See all 18 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.