Abstract
Yield and fruit size were determined for 49 strawberry ( Fragari × ananassa Duch.) genotypes during a 7 year period, in soils prepared with and without preplant soil fumigation using 2 methyl bromide: 1 chloropicrin (wt/wt). Strawberries were grown in alternate years, with the nonfumigated treatment representing the first, second, third, and fourth strawberry crop cycles initiated without soil fumigation. Highly significant ( P < 0.01) effects of soil fumigation treatment were present for yield in a combined analysis over all years; fumigation increased yield by 41% over nonfumigated soils in the first nonfumigated cultivation cycle and by 68% to 74% for subsequent nonfumigated cycles. Fruit size was less affected by soil treatment but increases due to fumigation (2% to 18%) were significant ( P < 0.05) in the third or fourth nonfumigated crop cycle. Genotypic variances were highly significant in the combined analysis, whereas geneti × fumigation interaction variances were significant only for fruit size and contributed <8% of the total phenotypic variance for either trait. Genetic correlations were r g = 0.77 and 0.92, respectively, for yield and fruit size treated as independent traits across soil fumigation environments. There was no evidence for genes that confer specific adaptation to nonfumigated soils, or that these genes emerge as important contributors to the phenotypic variation as the soil environment deteriorates with repeated cultivation of strawberry in nonfumigated soil. Chemical names used: trichloronitromethane (chloropicrin).
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Claims 8
Claim · model-written summary
Fumigation increased strawberry yield by 41% in the first nonfumigated cultivation cycle.
- Taxon
- strawberry
_single2.jpg?width=60)
Fragaria ×ananassat0 - Treatment
- fumigatione0
- Outcome
- yielde0
- Direction
- increasede0
- Value
- 41%e0
- Qualifier
- first nonfumigated cultivation cyclee0
- Comparator
- nonfumigated soilse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_single2.jpg?width=500)
Verbatim
e0“fumigation increased yield by 41% over nonfumigated soils in the first nonfumigated cultivation cycle”
t0“strawberry”
Claim · model-written summary
Fumigation increased strawberry yield by 68% to 74% in later nonfumigated cultivation cycles.
- Taxon
- strawberryFragaria ×ananassat0
- Treatment
- fumigatione0
- Outcome
- yielde0
- Direction
- increasede0
- Value
- 68% to 74%e0
- Qualifier
- subsequent nonfumigated cyclese0
- Comparator
- nonfumigated soilse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“fumigation increased yield by 41% over nonfumigated soils in the first nonfumigated cultivation cycle and by 68% to 74% for subsequent nonfumigated cycles”
t0“strawberry”
Claim · model-written summary
Fumigation increased strawberry fruit size by 2% to 18% in the third or fourth nonfumigated cycle.
- Taxon
- strawberryFragaria ×ananassat0
- Treatment
- fumigatione0
- Outcome
- Fruit sizee0
- Direction
- increasese0
- Value
- 2% to 18%e0
- Qualifier
- third or fourth nonfumigated crop cyclee0
- Comparator
- soil treatmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Fruit size was less affected by soil treatment but increases due to fumigation (2% to 18%) were significant ( P < 0.05) in the third or fourth nonfumigated crop cycle.”
t0“strawberry”
Claim · model-written summary
Strawberry genotypic variances were highly significant across years.
- Taxon
- strawberryFragaria ×ananassat0
- Outcome
- Genotypic variancese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Genotypic variances were highly significant in the combined analysis”
t0“strawberry”
Claim · model-written summary
Genotype by fumigation interaction variance was significant only for strawberry fruit size and accounted for under 8% of total phenotypic variance for either trait.
- Taxon
- strawberryFragaria ×ananassat0
- Treatment
- fumigatione0
- Outcome
- fruit sizee0
- Value
- <8%e0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“geneti × fumigation interaction variances were significant only for fruit size and contributed <8% of the total phenotypic variance for either trait”
t0“strawberry”
Claim · model-written summary
Genetic correlation for strawberry yield across fumigation environments was 0.77.
- Taxon
- strawberryFragaria ×ananassat0
- Treatment
- soil fumigation environmentse0
- Outcome
- yielde0
- Value
- 0.77e0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Genetic correlations were r g = 0.77 and 0.92, respectively, for yield and fruit size treated as independent traits across soil fumigation environments.”
t0“strawberry”
Claim · model-written summary
Genetic correlation for strawberry fruit size across fumigation environments was 0.92.
- Taxon
- strawberryFragaria ×ananassat0
- Treatment
- soil fumigation environmentse0
- Outcome
- fruit sizee0
- Value
- 0.92e0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Genetic correlations were r g = 0.77 and 0.92, respectively, for yield and fruit size treated as independent traits across soil fumigation environments.”
t0“strawberry”
Claim · model-written summary
The study found no evidence for genes conferring specific adaptation to nonfumigated strawberry soils.
- Taxon
- strawberryFragaria ×ananassat0
- Gene
- genese0
- Outcome
- specific adaptation to nonfumigated soilse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“There was no evidence for genes that confer specific adaptation to nonfumigated soils”
t0“strawberry”
The same questions in other papers
solarization · yield · Fragaria x ananassa (strawberry)Positive and negative results
30 papers in the same direction as this paper · 4 in the opposite direction · 3 reporting no difference from an alternative
- positive
- positive
- positive
34 papers more in this group
See all 38 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.