Abstract
Abstract Two approaches were used to determine the relationship between salt tolerance during seed germination and vegetative growth in tomato. First, F 4 progeny families of a cross between a breeding line, ‘UCT5’ (salt sensitive at all developmental stages), and a primitive cultivar, ‘PI 174263’ (salt tolerant during germination and vegetative growth), were evaluated in separate experiments for salt tolerance during germination and vegetative growth. There were significant differences among the F 4 families in both the rate of seed germination and the plant growth (dry matter production) under salt stress. There was, however, no significant correlation between the ability of seeds to germinate rapidly and the ability of plants to grow under salt stress. In the second approach, selection was made for rapid germination under salt stress in an F 2 population of the same cross and the selected progeny was evaluated for salt tolerance during both germination and vegetative growth. The results indicated that selection for salt tolerance during germination significantly improved germination performance under salt stress; a realized heritability estimate of 0.73 was obtained. Selection for salt tolerance during germination, however, did not affect plant salt tolerance during vegetative growth; there was no significant difference between the selected and unselected progeny based on either absolute or relative growth under salt stress. Obviously, in these genetic materials, salt tolerance during germination and vegetative growth are controlled by different mechanisms. Thus, to develop tomato cultivars with improved salt tolerance, selection protocols that include all critical developmental stages would be desirable.
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Claims 9
Claim · model-written summary
F4 families differed significantly in germination rate under salt stress.
- Taxon
- tomato
Solanum lycopersicumt0 - Material
- F 4 familiese0
- Treatment
- salt stresse0
- Outcome
- rate of seed germinatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“tomato”
e0“significant differences among the F 4 families in both the rate of seed germination and the plant growth (dry matter production) under salt stress.”
Claim · model-written summary
F4 families differed significantly in plant dry matter production under salt stress.
- Taxon
- tomatoSolanum lycopersicumt0
- Material
- F 4 familiese0
- Treatment
- salt stresse0
- Outcome
- plant growth (dry matter production)e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“tomato”
e0“significant differences among the F 4 families in both the rate of seed germination and the plant growth (dry matter production) under salt stress.”
Claim · model-written summary
Rapid seed germination and vegetative growth under salt stress were not significantly correlated.
- Taxon
- tomatoSolanum lycopersicumt0
- Organ / stage
- seedse0
- Outcome
- ability of plants to grow under salt stresse0
- Direction
- no significant correlatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“tomato”
e0“no significant correlation between the ability of seeds to germinate rapidly and the ability of plants to grow under salt stress.”
Claim · model-written summary
Selection for germination salt tolerance significantly improved germination under salt stress.
- Taxon
- tomatoSolanum lycopersicumt0
- Treatment
- selection for salt tolerance during germinatione0
- Outcome
- germination performancee0
- Direction
- improvede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“tomato”
e0“selection for salt tolerance during germination significantly improved germination performance under salt stress”
Claim · model-written summary
Realized heritability of germination salt tolerance was 0.73.
- Taxon
- tomatoSolanum lycopersicumt0
- Outcome
- realized heritability estimatee0
- Value
- 0.73e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“tomato”
e0“a realized heritability estimate of 0.73 was obtained.”
Claim · model-written summary
Germination-based selection did not affect vegetative salt tolerance by absolute growth.
- Taxon
- tomatoSolanum lycopersicumt0
- Treatment
- Selection for salt tolerance during germinatione0
- Outcome
- absolutee0
- Direction
- no significant differencee0
- Comparator
- unselected progenye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“tomato”
e0“Selection for salt tolerance during germination, however, did not affect plant salt tolerance during vegetative growth; there was no significant difference between the selected and unselected progeny based on either absolute or relative growth under salt stress.”
Claim · model-written summary
Germination-based selection did not affect vegetative salt tolerance by relative growth.
- Taxon
- tomatoSolanum lycopersicumt0
- Treatment
- Selection for salt tolerance during germinatione0
- Outcome
- relative growth under salt stresse0
- Direction
- no significant differencee0
- Comparator
- unselected progenye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“tomato”
e0“Selection for salt tolerance during germination, however, did not affect plant salt tolerance during vegetative growth; there was no significant difference between the selected and unselected progeny based on either absolute or relative growth under salt stress.”
Claim · model-written summary
Germination and vegetative salt tolerance appear to have different mechanisms in these materials.
- Taxon
- tomatoSolanum lycopersicumt0
- Outcome
- salt tolerance during germination and vegetative growthe0
- Qualifier
- different mechanismse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“tomato”
e0“in these genetic materials, salt tolerance during germination and vegetative growth are controlled by different mechanisms.”
Claim · model-written summary
Selection protocols should include all critical developmental stages to improve tomato salt tolerance.
- Taxon
- tomatoSolanum lycopersicumt0
- Outcome
- selection protocols that include all critical developmental stagese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“tomato”
e0“to develop tomato cultivars with improved salt tolerance, selection protocols that include all critical developmental stages would be desirable.”
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See all 300 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.