Abstract
A BC1 population (N = 1000) of an F1 hybrid between a stress-sensitive Lycopersicon esculentum breeding line (NC84173; maternal and recurrent parent) and a germination stress-tolerant Lycopersicon pimpinellifolium accession (LA722) was evaluated for seed germination rate under drought stress (DS) (14% w/v polyethyleneglycol-8000, water potential approximately -680 kPa), and the most rapidly germinating seeds (first 3% to germinate) were selected. The 30 selected BC1 seedlings were grown to maturity and self pollinated to produce BC1S1 progeny seeds. Twenty of the 30 selected BC1S1 progeny families were evaluated for germination rate under DS and their average performance was compared with that of a "nonselected" BC1S1 population of the same cross. Results indicated that selection for rapid germination under DS significantly improved progeny germination rate under DS (selection gain = 19.6%), suggesting a realized heritability of 0.47 for rate of germination under DS in this population. The 30 selected BC1 plants were subjected to restriction fragment length polymorphism (RFLP) analysis, and marker allele frequencies for 119 RFLP markers which spanned 1153 cM of the 12 tomato chromosomes were determined. A distributional extreme marker analysis, which measures statistical differences in marker allele frequencies between a selected and a nonselected population, detected four quantitative trait loci (QTLs) for rate of germination under DS in this population. Of these, two QTLs, located on chromosomes 1 and 9, were contributed by the L. pimpinellifolium donor parent and had larger effects than the other two QTLs, located on chromosomes 8 and 12, which were contributed by the L. esculentum recurrent parent. A few BC1S1 families were identified with all or most of the identified QTLs and with germination rates comparable with that of LA722. These families should be useful for the development of germination drought-tolerant tomato lines using marker-assisted selection (MAS). The overall results indicate that drought tolerance during seed germination in tomato is genetically controlled and potentially could be improved by directional phenotypic selection or MAS.
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 8
Claim · model-written summary
Selection for rapid tomato germination under drought stress improved progeny germination rate by 19.6%.
- Taxon
- tomato
Solanum lycopersicumt0 - Treatment
- selection for rapid germination under DSe0
- Outcome
- progeny germination rate under DSe0
- Direction
- improvede0
- Value
- 19.6%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“selection for rapid germination under DS significantly improved progeny germination rate under DS (selection gain = 19.6%)”
t0“tomato”
Claim · model-written summary
The realized heritability of germination rate under drought stress was estimated at 0.47.
- Taxon
- tomatoSolanum lycopersicumt0
- Outcome
- realized heritabilitye0
- Value
- 0.47e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a realized heritability of 0.47 for rate of germination under DS in this population”
t0“tomato”
Claim · model-written summary
Extreme marker analysis detected four QTLs for tomato germination rate under drought stress.
- Taxon
- tomatoSolanum lycopersicumt0
- Outcome
- quantitative trait loci (QTLs) for rate of germination under DSe0
- Value
- foure0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“detected four quantitative trait loci (QTLs) for rate of germination under DS in this population”
t0“tomato”
Claim · model-written summary
The QTLs on chromosomes 1 and 9 came from the L. pimpinellifolium donor and had larger effects than the other two QTLs.
- Taxon
- tomatoSolanum lycopersicumt0
- Material
- L. pimpinellifolium donor parente0
- Gene
- QTLse0
- Outcome
- larger effectse0
- Direction
- largere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“two QTLs, located on chromosomes 1 and 9, were contributed by the L. pimpinellifolium donor parent and had larger effects than the other two QTLs”
t0“tomato”
Claim · model-written summary
The QTLs on chromosomes 8 and 12 came from the L. esculentum recurrent parent.
- Taxon
- L. esculentumSolanum lycopersicume0
- Gene
- QTLse0
- Outcome
- contributed by the L. esculentum recurrent parente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the other two QTLs, located on chromosomes 8 and 12, which were contributed by the L. esculentum recurrent parent”
Claim · model-written summary
Some BC1S1 families carrying all or most identified QTLs germinated at rates comparable to LA722.
- Taxon
- tomatoSolanum lycopersicumt0
- Material
- BC1S1 familiese0
- Outcome
- germination ratese0
- Direction
- comparablee0
- Comparator
- LA722e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A few BC1S1 families were identified with all or most of the identified QTLs and with germination rates comparable with that of LA722”
t0“tomato”
Claim · model-written summary
The authors propose the selected families for developing drought-tolerant tomato lines through marker-assisted selection.
- Taxon
- tomatoSolanum lycopersicume0
- Outcome
- development of germination drought-tolerant tomato linese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“These families should be useful for the development of germination drought-tolerant tomato lines using marker-assisted selection (MAS)”
Claim · model-written summary
The authors conclude that seed-germination drought tolerance in tomato is genetically controlled and could be improved by phenotypic or marker-assisted selection.
- Taxon
- tomatoSolanum lycopersicume0
- Outcome
- drought tolerance during seed germinatione0
- Direction
- improvede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“drought tolerance during seed germination in tomato is genetically controlled and potentially could be improved by directional phenotypic selection or MAS”
The same questions in other papers
drought · pest · Solanum lycopersicum (tomato)Positive and negative results
2 papers in the same direction as this paper · 2 in the opposite direction
- negative
- negative
- positive
1 paper more in this group
See all 5 papers →processing · pest · Solanum lycopersicum (tomato)Positive and negative results
6 papers in the same direction as this paper · 1 in the opposite direction
- negative
- positive
- positive
4 papers more in this group
See all 8 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.