Abstract
To evaluate the changes in seed yield and oil quality of sunflower (Helianthus annuus L.) in response to changing environmental conditions across different planting dates and genotypic variability, a field experiment was carried out during spring 2005-2008 at PAU, Ludhiana. Planting dates affected seed yields more than any of the other characteristics measured with significant yield reduction under delayed planting conditions. An increase in oleic with decrease in linoleic acid (r = –0.993*) was observed with each progressive delay in planting time. Change in the oleic/linoleic acid ratio under different planting dates suggests a possible role of environmental factors especially temperature on the seed development processes during reproductive phase further deciding the oil quality. Total heat units accumulated during the seed maturation period had positive correlation with oleic (r = 0.697*) and negative with linoleic correlation (r = –0.578*) acid. Further investigation is needed to get deeper insight into the effects on seed oil composition of the interaction between changes in temperature regime and/or planting time under field/controlled conditions for yield maximization and better quality sunflower oil.
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Claims 6
Claim · model-written summary
Delayed planting caused a significant reduction in sunflower seed yield, more than other characteristics measured.
- Taxon
- sunflower
Helianthus annuuse0 - Treatment
- delayed planting conditionse1
- Outcome
- seed yieldse1
- Direction
- yield reductione1
- Setting
- PAU, Ludhianae5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“seed yield and oil quality of sunflower (Helianthus annuus L.)”
e1“Planting dates affected seed yields more than any of the other characteristics measured with significant yield reduction under delayed planting conditions”
e5“a field experiment was carried out during spring 2005-2008 at PAU, Ludhiana”
Claim · model-written summary
Oleic acid increased with each progressive delay in planting time.
- Taxon
- sunflowerHelianthus annuuse0
- Treatment
- progressive delay in planting timee2
- Outcome
- oleice2
- Direction
- increasee2
- Value
- r = –0.993*e2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“seed yield and oil quality of sunflower (Helianthus annuus L.)”
e2“An increase in oleic with decrease in linoleic acid (r = –0.993*) was observed with each progressive delay in planting time”
Claim · model-written summary
Linoleic acid decreased with each progressive delay in planting time.
- Taxon
- sunflowerHelianthus annuuse0
- Treatment
- progressive delay in planting timee2
- Outcome
- linoleic acide2
- Direction
- decreasee2
- Value
- r = –0.993*e2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“seed yield and oil quality of sunflower (Helianthus annuus L.)”
e2“An increase in oleic with decrease in linoleic acid (r = –0.993*) was observed with each progressive delay in planting time”
Claim · model-written summary
The oleic/linoleic acid ratio change under different planting dates may reflect a role of environmental factors, especially temperature, in seed development.
- Taxon
- sunflowerHelianthus annuuse0
- Outcome
- oleic/linoleic acid ratioe4
- Qualifier
- environmental factors especially temperaturee4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“seed yield and oil quality of sunflower (Helianthus annuus L.)”
e4“Change in the oleic/linoleic acid ratio under different planting dates suggests a possible role of environmental factors especially temperature on the seed development processes”
Claim · model-written summary
Heat units accumulated during seed maturation were positively correlated with oleic acid.
- Taxon
- sunflowerHelianthus annuuse0
- Treatment
- Total heat units accumulated during the seed maturation periode3
- Outcome
- oleice3
- Direction
- positivee3
- Value
- r = 0.697*e3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“seed yield and oil quality of sunflower (Helianthus annuus L.)”
e3“Total heat units accumulated during the seed maturation period had positive correlation with oleic (r = 0.697*) and negative with linoleic correlation (r = –0.578*) acid”
Claim · model-written summary
Heat units accumulated during seed maturation were negatively correlated with linoleic acid.
- Taxon
- sunflowerHelianthus annuuse0
- Treatment
- Total heat units accumulated during the seed maturation periode3
- Outcome
- linoleice3
- Direction
- negativee3
- Value
- r = –0.578*e3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“seed yield and oil quality of sunflower (Helianthus annuus L.)”
e3“Total heat units accumulated during the seed maturation period had positive correlation with oleic (r = 0.697*) and negative with linoleic correlation (r = –0.578*) acid”
The same questions in other papers
sowing time · yield · Helianthus annuus (common sunflower)Positive and negative results
13 papers in the same direction as this paper · 39 in the opposite direction
- positive
- positive
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See all 53 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.