Abstract
Abstract Quantitative genetics of chemical and textural attributes of quality of winter squash ( Cucurbita maxima ) were studied using the F 1 , F 2 , and backcrosses of the two crosses ‘Scarlet Warren’ × ‘CF2’ and ‘Scarlet Warren’ × ‘CF4’. The 3‐parameter additive‐dominance model adequately explained the variation among generation means of ‘Scarlet Warren’ × ‘CF2’ for dry matter (DM), alcohol‐insoluble solids, sucrose, glucose, fructose, soluble pectin, springiness, and adhesiveness but failed with total pectin, fracture hardness, and cohesiveness. Among generation means of ‘Scarlet Warren’ × ‘CF4’, the model explained the variation in all attributes except DM and springiness. Additive gene effects were negative for DM, alcohol‐insoluble solids, sucrose, soluble pectin, and adhesiveness but positive for glucose, fructose, total pectin, and springiness. Dominance gene effects were negative for alcohol‐insoluble solids and total pectin but positive for all three sugars, soluble pectin, springiness, and adhesiveness. Low heritability for most attributes other than sucrose indicated that environmental impacts (attributed to different growing climates for the two sites used for this study) were larger than genetic effects. Thus, breeding to produce sweeter squash is feasible, but breeding for textural improvement would seem to be problematic because the environment has an overriding effect on textural attributes.
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Claims 10
Claim · model-written summary
The additive-dominance model fit eight quality traits of Scarlet Warren × CF2.
- Taxon
- winter squash
Cucurbita maximat0 - Material
- ‘Scarlet Warren’ × ‘CF2’e0
- Outcome
- variation among generation meanse0
- Value
- 3‐parametere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The 3‐parameter additive‐dominance model adequately explained the variation among generation means of ‘Scarlet Warren’ × ‘CF2’ for dry matter (DM), alcohol‐insoluble solids, sucrose, glucose, fructose, soluble pectin, springiness, and adhesiveness”
t0“winter squash ( Cucurbita maxima )”
Claim · model-written summary
The model failed to fit total pectin, fracture hardness, and cohesiveness in Scarlet Warren × CF2.
- Taxon
- winter squashCucurbita maximat0
- Material
- ‘Scarlet Warren’ × ‘CF2’e1
- Outcome
- total pectin, fracture hardness, and cohesivenesse0
- Value
- total pectin, fracture hardness, and cohesivenesse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“but failed with total pectin, fracture hardness, and cohesiveness.”
e1“generation means of ‘Scarlet Warren’ × ‘CF2’”
t0“winter squash ( Cucurbita maxima )”
Claim · model-written summary
The model fit all Scarlet Warren × CF4 attributes except dry matter and springiness.
- Taxon
- winter squashCucurbita maximat0
- Material
- ‘Scarlet Warren’ × ‘CF4’e0
- Outcome
- variation in all attributes except DM and springinesse0
- Value
- all attributes except DM and springinesse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Among generation means of ‘Scarlet Warren’ × ‘CF4’, the model explained the variation in all attributes except DM and springiness.”
t0“winter squash ( Cucurbita maxima )”
Claim · model-written summary
Additive gene effects were negative for dry matter, alcohol-insoluble solids, sucrose, soluble pectin, and adhesiveness.
- Taxon
- winter squashCucurbita maximat0
- Outcome
- Additive gene effectse0
- Direction
- negativee0
- Qualifier
- DM, alcohol‐insoluble solids, sucrose, soluble pectin, and adhesivenesse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Additive gene effects were negative for DM, alcohol‐insoluble solids, sucrose, soluble pectin, and adhesiveness”
t0“winter squash ( Cucurbita maxima )”
Claim · model-written summary
Additive gene effects were positive for glucose, fructose, total pectin, and springiness.
- Taxon
- winter squashCucurbita maximat0
- Outcome
- Additive gene effectse1
- Direction
- positivee0
- Qualifier
- glucose, fructose, total pectin, and springinesse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“positive for glucose, fructose, total pectin, and springiness.”
e1“Additive gene effects”
t0“winter squash ( Cucurbita maxima )”
Claim · model-written summary
Dominance gene effects were negative for alcohol-insoluble solids and total pectin.
- Taxon
- winter squashCucurbita maximat0
- Outcome
- Dominance gene effectse0
- Direction
- negativee0
- Qualifier
- alcohol‐insoluble solids and total pectine0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Dominance gene effects were negative for alcohol‐insoluble solids and total pectin”
t0“winter squash ( Cucurbita maxima )”
Claim · model-written summary
Dominance gene effects were positive for three sugars, soluble pectin, springiness, and adhesiveness.
- Taxon
- winter squashCucurbita maximat0
- Outcome
- Dominance gene effectse1
- Direction
- positivee0
- Qualifier
- all three sugars, soluble pectin, springiness, and adhesivenesse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“positive for all three sugars, soluble pectin, springiness, and adhesiveness.”
e1“Dominance gene effects”
t0“winter squash ( Cucurbita maxima )”
Claim · model-written summary
Most attributes except sucrose had low heritability, suggesting larger environmental than genetic effects.
- Taxon
- winter squashCucurbita maximat0
- Outcome
- heritabilitye0
- Direction
- Lowe0
- Qualifier
- most attributes other than sucrosee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Low heritability for most attributes other than sucrose indicated that environmental impacts (attributed to different growing climates for the two sites used for this study) were larger than genetic effects.”
t0“winter squash ( Cucurbita maxima )”
Claim · model-written summary
The authors concluded that breeding sweeter squash is feasible.
- Taxon
- winter squashCucurbita maximat0
- Outcome
- breeding to produce sweeter squash is feasiblee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“breeding to produce sweeter squash is feasible”
t0“winter squash ( Cucurbita maxima )”
Claim · model-written summary
The authors concluded that breeding for texture improvement is problematic due to environmental effects.
- Taxon
- winter squashCucurbita maximat0
- Outcome
- breeding for textural improvement would seem to be problematice0
- Qualifier
- environment has an overriding effect on textural attributese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“breeding for textural improvement would seem to be problematic because the environment has an overriding effect on textural attributes.”
t0“winter squash ( Cucurbita maxima )”