Abstract
Evaluation of single-kernel density of scab-damaged winter wheat Measurements of single-kernel mass and volume made on healthy (control) and scab-damaged samples of grain of three winter wheat varieties never resulted in lower values of mean single-kernel density for scab-damaged grain. This finding, contrary to common opinion, can be explained as being a result of the comparable magnitude of relative decrease (due to infestation) of two features (mass and volume) that define single-kernel density. The discrepancy between results presented in this paper (kernel volume was determined with an air pycnometer) and the results in some other reports (liquid pycnometers used) can result from the different methods applied for kernel volume measurements: when a liquid medium is used the surface tension effect tends to overestimate the volume, especially for scabby kernels that are known to be shrivelled ie possessing voids and pores at the surface that the liquid cannot penetrate. As a consequence kernel density of scabby kernels can be significantly underestimated.
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Claims 4
Claim · model-written summary
Scab damaged wheat grain did not have lower mean single kernel density than healthy grain.
- Taxon
- winter wheat
Triticum aestivume0 - Treatment
- scab-damagede0
- Outcome
- mean single-kernel densitye0
- Direction
- never resulted in lower valuese0
- Comparator
- healthy (control)e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“healthy (control) and scab-damaged samples of grain of three winter wheat varieties never resulted in lower values of mean single-kernel density for scab-damaged grain”
Claim · model-written summary
Scab infestation comparably decreased kernel mass and volume.
- Taxon
- winter wheatTriticum aestivumt0
- Outcome
- mass and volumee0
- Direction
- relative decreasee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“comparable magnitude of relative decrease (due to infestation) of two features (mass and volume)”
t0“winter wheat”
Claim · model-written summary
Liquid pycnometry may overestimate scabby kernel volume through surface tension.
- Taxon
- winter wheatTriticum aestivumt0
- Outcome
- overestimate the volumee0
- Comparator
- liquid mediume0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“when a liquid medium is used the surface tension effect tends to overestimate the volume, especially for scabby kernels”
t0“winter wheat”
Claim · model-written summary
Consequently, scabby kernel density can be significantly underestimated.
- Taxon
- winter wheatTriticum aestivumt0
- Outcome
- kernel density of scabby kernelse0
- Direction
- underestimatede0
- Comparator
- liquid pycnometerse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“kernel density of scabby kernels can be significantly underestimated”
t0“winter wheat”
e1“liquid pycnometers used”