Abstract
Tall fescue ( Festuca arundinacea , Schreb.) genotypes, selected to represent a range in leaf widths, were subjected to several combinations of defoliation treatments and temperature regimes. The effects and interrelationships of characters associated with forage yield were studied with the objective of ultimately developing more meaningful selection indices. Genotypic differences in tillering capacity were associated with leaf width. Number of tillers of genotypes selected for wide, medium, and narrow leaves increased 302, 342, and 406%, respectively, over a 15‐week period in the greenhouse. Increasing stubble height from 4 to 12 cm resulted in increased tillering and energy reserves and lower forage yield. Tillering, dry matter yield, and energy reserves increased as number of tillers left uncut at each harvest increased from 0 to 20%, and they tended to remain constant from 20 to 40% intact tillers. Genetic and temperature effects on tillering were significant at 17/7, 22/12, 27/17, and 32/22 C (day/night) temperature regimes in controlled environment chambers. Maximum tillering occurred at 22/12 C and declined significantly at higher temperatures. A genotype with narrow leaves from North Africa (194‐24) produced significantly more tillers than genotypes selected from North American strains and cultivars, particularly at lower temperature regimes. Although leaf width and number of tillers were negatively correlated (r = _0.67), neither was significantly correlated with dry matter yield.
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Claims 14
Claim · model-written summary
Genotypic tillering capacity differed with leaf width.
- Taxon
- Tall Fescue
Lolium arundinaceumt0 - Material
- Genotypice0
- Organ / stage
- leafe0
- Outcome
- tillering capacitye0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Genotypic differences in tillering capacity were associated with leaf width”
t0“Effect of Leaf Width on Responses of Tall Fescue Genotypes to Defoliation Treatment and Temperature Regimes1”
Claim · model-written summary
Wide-leaved genotypes increased tiller number by 302% over 15 weeks.
- Taxon
- Tall FescueLolium arundinaceumt0
- Material
- widee0
- Outcome
- Number of tillerse0
- Direction
- increasede0
- Value
- 302e0
- Setting
- greenhousee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Number of tillers of genotypes selected for wide, medium, and narrow leaves increased 302, 342, and 406%, respectively, over a 15‐week period in the greenhouse”
t0“Effect of Leaf Width on Responses of Tall Fescue Genotypes to Defoliation Treatment and Temperature Regimes1”
Claim · model-written summary
Medium-leaved genotypes increased tiller number by 342% over 15 weeks.
- Taxon
- Tall FescueLolium arundinaceumt0
- Material
- mediume0
- Outcome
- Number of tillerse0
- Direction
- increasede0
- Value
- 342e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Number of tillers of genotypes selected for wide, medium, and narrow leaves increased 302, 342, and 406%, respectively, over a 15‐week period in the greenhouse”
t0“Effect of Leaf Width on Responses of Tall Fescue Genotypes to Defoliation Treatment and Temperature Regimes1”
Claim · model-written summary
Narrow-leaved genotypes increased tiller number by 406% over 15 weeks.
- Taxon
- Tall FescueLolium arundinaceumt0
- Material
- narrowe0
- Outcome
- Number of tillerse0
- Direction
- increasede0
- Value
- 406%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Number of tillers of genotypes selected for wide, medium, and narrow leaves increased 302, 342, and 406%, respectively, over a 15‐week period in the greenhouse”
t0“Effect of Leaf Width on Responses of Tall Fescue Genotypes to Defoliation Treatment and Temperature Regimes1”
Claim · model-written summary
Increasing stubble height increased tillering and energy reserves.
- Taxon
- Tall FescueLolium arundinaceumt0
- Treatment
- stubble height from 4 to 12 cme0
- Outcome
- tillering and energy reservese0
- Direction
- increasede0
- Comparator
- 4e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Increasing stubble height from 4 to 12 cm resulted in increased tillering and energy reserves and lower forage yield”
t0“Effect of Leaf Width on Responses of Tall Fescue Genotypes to Defoliation Treatment and Temperature Regimes1”
Claim · model-written summary
Increasing stubble height lowered forage yield.
- Taxon
- Tall FescueLolium arundinaceumt0
- Treatment
- stubble height from 4 to 12 cme0
- Outcome
- forage yielde0
- Direction
- lowere0
- Comparator
- 4e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Increasing stubble height from 4 to 12 cm resulted in increased tillering and energy reserves and lower forage yield”
t0“Effect of Leaf Width on Responses of Tall Fescue Genotypes to Defoliation Treatment and Temperature Regimes1”
Claim · model-written summary
Leaving more tillers uncut from 0 to 20% increased tillering, dry matter yield, and energy reserves.
- Taxon
- Tall FescueLolium arundinaceumt0
- Treatment
- tillers left uncut at each harvest increased from 0 to 20%e0
- Outcome
- Tillering, dry matter yield, and energy reservese0
- Direction
- increasede0
- Comparator
- 0e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Tillering, dry matter yield, and energy reserves increased as number of tillers left uncut at each harvest increased from 0 to 20%”
t0“Effect of Leaf Width on Responses of Tall Fescue Genotypes to Defoliation Treatment and Temperature Regimes1”
Claim · model-written summary
These traits tended to remain constant from 20 to 40% intact tillers.
- Taxon
- Tall FescueLolium arundinaceumt0
- Treatment
- 20 to 40% intact tillerse0
- Outcome
- Tillering, dry matter yield, and energy reservese0
- Direction
- remain constante0
- Comparator
- 20e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Tillering, dry matter yield, and energy reserves increased as number of tillers left uncut at each harvest increased from 0 to 20%, and they tended to remain constant from 20 to 40% intact tillers”
t0“Effect of Leaf Width on Responses of Tall Fescue Genotypes to Defoliation Treatment and Temperature Regimes1”
Claim · model-written summary
Genotype and temperature significantly affected tillering across the tested temperature regimes.
- Taxon
- Tall FescueLolium arundinaceumt0
- Treatment
- temperature regimese0
- Outcome
- tilleringe0
- Setting
- controlled environment chamberse0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Genetic and temperature effects on tillering were significant at 17/7, 22/12, 27/17, and 32/22 C (day/night) temperature regimes in controlled environment chambers”
t0“Effect of Leaf Width on Responses of Tall Fescue Genotypes to Defoliation Treatment and Temperature Regimes1”
Claim · model-written summary
Maximum tillering occurred at 22/12 C.
- Taxon
- Tall FescueLolium arundinaceumt0
- Outcome
- Maximum tilleringe0
- Direction
- Maximume0
- Value
- 22/12 Ce0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Maximum tillering occurred at 22/12 C”
t0“Effect of Leaf Width on Responses of Tall Fescue Genotypes to Defoliation Treatment and Temperature Regimes1”
Claim · model-written summary
Tillering declined significantly at higher temperatures.
- Taxon
- Tall FescueLolium arundinaceumt0
- Treatment
- higher temperaturese0
- Outcome
- tilleringe0
- Direction
- declinede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Maximum tillering occurred at 22/12 C and declined significantly at higher temperatures”
t0“Effect of Leaf Width on Responses of Tall Fescue Genotypes to Defoliation Treatment and Temperature Regimes1”
Claim · model-written summary
North African narrow-leaved genotype 194‐24 produced more tillers than North American strains and cultivars.
- Taxon
- Tall FescueLolium arundinaceumt0
- Material
- 194‐24e0
- Outcome
- tillerse0
- Direction
- moree0
- Comparator
- genotypes selected from North American strains and cultivarse0
- Setting
- North Africae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A genotype with narrow leaves from North Africa (194‐24) produced significantly more tillers than genotypes selected from North American strains and cultivars, particularly at lower temperature regimes”
t0“Effect of Leaf Width on Responses of Tall Fescue Genotypes to Defoliation Treatment and Temperature Regimes1”
Claim · model-written summary
Leaf width and tiller number were negatively correlated.
- Taxon
- Tall FescueLolium arundinaceumt0
- Organ / stage
- leafe0
- Outcome
- number of tillerse0
- Direction
- negatively correlatede0
- Value
- r = _0.67e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“leaf width and number of tillers were negatively correlated (r = _0.67)”
t0“Effect of Leaf Width on Responses of Tall Fescue Genotypes to Defoliation Treatment and Temperature Regimes1”
Claim · model-written summary
Neither leaf width nor tiller number significantly correlated with dry matter yield.
- Taxon
- Tall FescueLolium arundinaceumt0
- Organ / stage
- leaft0
- Outcome
- dry matter yielde0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“neither was significantly correlated with dry matter yield”
t0“Effect of Leaf Width on Responses of Tall Fescue Genotypes to Defoliation Treatment and Temperature Regimes1”
The same questions in other papers
tillage · yield · Lolium arundinaceum (tall fescue)Positive and negative results
1 in the opposite direction · 1 reporting no difference from an alternative
- negative
- no effect
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.