Abstract
The stable production of high vigorous seeds is pivotal to crop yield. Also, a high longevity is essential to avoid progressive loss of seed vigour during storage. Both seed traits are strongly influenced by the environment during seed development. Here, we investigated the impact of heat stress (HS) during fruit ripening on tomato seed lifespan during storage at moderate relative humidity, speed (t50) and homogeneity of germination, using a MAGIC population that was produced under optimal and HS conditions. A plasticity index was used to assess the extent of the impact of HS for each trait. HS reduced the average longevity and germination homogeneity by 50% within the parents and MAGIC population. However, there was a high genetic variability in the seed response to heat stress. A total of 39 QTLs were identified, including six longevity QTLs for seeds from control (3) and HS (3) conditions, and six plasticity QTLs for longevity, with only one overlapping with a longevity QTL under HS. Four out of the six longevity QTL co-located with t50 QTL, revealing hotspots for seed quality traits. Twenty-one QTLs with intervals below 3 cM were analyzed using previous transcriptome and gene network data to propose candidate genes for seed vigour and longevity traits.
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Claims 9
Claim · model-written summary
Heat stress reduced average seed longevity by 50% in parents and the MAGIC population.
- Taxon
- Tomato
Solanum lycopersicumt0 - Material
- parents and MAGIC populatione0
- Treatment
- HSe0
- Outcome
- average longevitye0
- Direction
- reducede0
- Value
- 50%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“HS reduced the average longevity and germination homogeneity by 50% within the parents and MAGIC population”
t0“Tomato”
Claim · model-written summary
Heat stress reduced germination homogeneity by 50% in parents and the MAGIC population.
- Taxon
- TomatoSolanum lycopersicumt0
- Material
- parents and MAGIC populatione0
- Treatment
- HSe0
- Outcome
- germination homogeneitye0
- Direction
- reducede0
- Value
- 50%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“HS reduced the average longevity and germination homogeneity by 50% within the parents and MAGIC population”
t0“Tomato”
Claim · model-written summary
Tomato seeds showed high genetic variability in response to heat stress.
- Taxon
- TomatoSolanum lycopersicumt0
- Outcome
- high genetic variability in the seed response to heat stresse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“there was a high genetic variability in the seed response to heat stress”
t0“Tomato”
Claim · model-written summary
The study identified 39 QTLs for seed traits.
- Taxon
- TomatoSolanum lycopersicumt0
- Outcome
- QTLse0
- Value
- 39 QTLse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A total of 39 QTLs were identified”
t0“Tomato”
Claim · model-written summary
Six longevity QTLs were identified, three each for control and heat stress seeds.
- Taxon
- TomatoSolanum lycopersicumt0
- Outcome
- longevity QTLse0
- Value
- six longevity QTLse0
- Qualifier
- control (3) and HS (3) conditionse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“six longevity QTLs for seeds from control (3) and HS (3) conditions”
t0“Tomato”
Claim · model-written summary
Six plasticity QTLs for longevity were identified.
- Taxon
- TomatoSolanum lycopersicumt0
- Outcome
- plasticity QTLs for longevitye0
- Value
- six plasticity QTLse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“six plasticity QTLs for longevity”
t0“Tomato”
Claim · model-written summary
Only one longevity plasticity QTL overlapped a longevity QTL under heat stress.
- Taxon
- TomatoSolanum lycopersicumt0
- Outcome
- overlapping with a longevity QTL under HSe0
- Value
- onee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“with only one overlapping with a longevity QTL under HS”
t0“Tomato”
Claim · model-written summary
Four of six longevity QTLs co-located with t50 QTLs.
- Taxon
- TomatoSolanum lycopersicumt0
- Outcome
- longevity QTL co-located with t50 QTLe0
- Value
- Four out of the sixe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Four out of the six longevity QTL co-located with t50 QTL”
t0“Tomato”
Claim · model-written summary
Twenty-one narrow QTL intervals were analyzed to propose candidate genes for seed vigour and longevity.
- Taxon
- TomatoSolanum lycopersicumt0
- Outcome
- candidate genes for seed vigour and longevity traitse0
- Value
- Twenty-one QTLse0
- Qualifier
- intervals below 3 cMe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Twenty-one QTLs with intervals below 3 cM were analyzed using previous transcriptome and gene network data to propose candidate genes for seed vigour and longevity traits”
t0“Tomato”
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