Abstract
The purpose of this study was to determine the genetic relationship between salt tolerance during seed germination and vegetative growth in tomato by comparing quantitative trait loci (QTLs) which confer salt tolerance at these two developmental stages. A salt-sensitive Lycopersicon esculentum line (NC84173; maternal and recurrent parent) was hybridized with a salt-tolerant accession (LA722) of Lycopersicon pimpinellifolium, and BC 1 and BC 1 S 1 populations were developed. The BC 1 population was used for RFLP mapping and the BC 1 S 1 population for evaluation of salt tolerance during germination and vegetative growth. The results indicated the presence of a small but significant correlation (r = -0.22, p < 0.05) between rate of seed germination and the percentage of plant survival under salt stress. Seven and five QTLs were identified for salt tolerance during seed germination and vegetative growth, respectively. While in most cases the location of QTLs for germination was different from that for vegetative growth, there were some coincidences in QTL locations; this was consistent with the small phenotypic correlation observed between the two traits. The overall results indicated that, in these tomato genetic materials, salt tolerance during seed germination was independent of that during vegetative growth. However, simultaneous improvement of tolerance at the two developmental stages should be possible through marker-assisted selection and breeding.Key words: Lycopersicon esculentum, L. pimpinellifolium, salt tolerance, seed germination vegetative growth, restriction fragment length polymorphism (RFLP), quantitative trait loci (QTLs).
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Claims 7
Claim · model-written summary
Seed germination rate and plant survival under salt stress had a small significant negative correlation.
- Taxon
- tomato
Solanum lycopersicumt0 - Treatment
- salt stresse0
- Outcome
- rate of seed germination and the percentage of plant survivale0
- Value
- r = -0.22e0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“small but significant correlation (r = -0.22, p < 0.05) between rate of seed germination and the percentage of plant survival under salt stress”
t0“tomato”
Claim · model-written summary
Seven QTLs were identified for salt tolerance during seed germination.
- Taxon
- tomatoSolanum lycopersicumt0
- Gene
- QTLse0
- Outcome
- QTLs were identified for salt tolerance during seed germinatione0
- Value
- Sevene0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Seven and five QTLs were identified for salt tolerance during seed germination and vegetative growth, respectively.”
t0“tomato”
Claim · model-written summary
Five QTLs were identified for salt tolerance during vegetative growth.
- Taxon
- tomatoSolanum lycopersicumt0
- Gene
- QTLse0
- Outcome
- QTLs were identified for salt tolerance during seed germination and vegetative growthe0
- Value
- fivee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Seven and five QTLs were identified for salt tolerance during seed germination and vegetative growth, respectively.”
t0“tomato”
Claim · model-written summary
Most germination QTL positions differed from vegetative-growth QTL positions.
- Taxon
- tomatoSolanum lycopersicumt0
- Gene
- QTLse0
- Outcome
- location of QTLs for germinatione0
- Direction
- differente0
- Comparator
- vegetative growthe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in most cases the location of QTLs for germination was different from that for vegetative growth”
t0“tomato”
Claim · model-written summary
Some germination and vegetative-growth QTL positions coincided.
- Taxon
- tomatoSolanum lycopersicumt0
- Gene
- QTLe0
- Outcome
- some coincidences in QTL locationse0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“there were some coincidences in QTL locations”
t0“tomato”
Claim · model-written summary
The authors interpret salt tolerance at germination as independent of tolerance during vegetative growth in these materials.
- Taxon
- tomatoSolanum lycopersicume0
- Material
- tomato genetic materialse0
- Outcome
- salt tolerance during seed germinatione0
- Direction
- independente0
- Comparator
- vegetative growthe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in these tomato genetic materials, salt tolerance during seed germination was independent of that during vegetative growth”
Claim · model-written summary
The authors recommend simultaneous improvement of tolerance at both stages through marker-assisted breeding.
- Taxon
- tomatoSolanum lycopersicumt0
- Treatment
- marker-assisted selection and breedinge0
- Outcome
- simultaneous improvement of tolerance at the two developmental stagese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“simultaneous improvement of tolerance at the two developmental stages should be possible through marker-assisted selection and breeding”
t0“tomato”