Abstract
Heat stress substantially reduces the yield potential of wheat (Triticum aestivum L.), one of the most widely cultivated staple crops, and greatly threatens global food security in the context of global warming. However, few studies have explored the heat stress tolerance (HST)-related genetic resources in wheat. Here, we identified and fine-mapped a wheat HST locus, TaHST2, which is indispensable for HST in both the vegetative and reproductive stages of the wheat life cycle. The studied pair of near isogenic lines (NILs) exhibited diverse morphologies under heat stress, based on which we mapped TaHST2 to a 485 kb interval on chromosome arm 4DS. Under heat stress, TaHST2 confers a superior conversion rate from soluble sugars to starch in wheat grains, resulting in faster grain filling and a higher yield potential. A further exploration of genetic resources indicated that TaHST2 underwent strong artificial selection during wheat domestication, suggesting it is an essential locus for basal HST in wheat. Our findings provide deeper insights into the genetic basis of wheat HST and might be useful for global efforts to breed heat-stress-tolerant cultivars.
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Claims 6
Claim · model-written summary
TaHST2 is indispensable for heat stress tolerance in both the vegetative and reproductive stages of wheat.
- Taxon
- wheat
Triticum aestivume0 - Organ / stage
- vegetative and reproductive stagese1
- Gene
- TaHST2e1
- Outcome
- HSTe1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“we identified and fine-mapped a wheat HST locus, TaHST2”
e1“TaHST2, which is indispensable for HST in both the vegetative and reproductive stages”
Claim · model-written summary
TaHST2 was mapped to a 485 kb interval on chromosome arm 4DS.
- Taxon
- wheatTriticum aestivume0
- Gene
- TaHST2e2
- Outcome
- mapped TaHST2 to a 485 kb intervale2
- Value
- 485 kbe2
- Qualifier
- on chromosome arm 4DSe2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“we identified and fine-mapped a wheat HST locus, TaHST2”
e2“we mapped TaHST2 to a 485 kb interval on chromosome arm 4DS”
Claim · model-written summary
Under heat stress, TaHST2 gives a superior conversion rate from soluble sugars to starch in wheat grains.
- Taxon
- wheatTriticum aestivume0
- Organ / stage
- wheat grainse3
- Treatment
- Under heat stresse3
- Gene
- TaHST2e3
- Outcome
- conversion rate from soluble sugars to starche3
- Direction
- superiore3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“we identified and fine-mapped a wheat HST locus, TaHST2”
e3“Under heat stress, TaHST2 confers a superior conversion rate from soluble sugars to starch in wheat grains, resulting in faster grain filling and a higher yield potential”
Claim · model-written summary
Under heat stress, TaHST2 gives faster grain filling in wheat.
- Taxon
- wheatTriticum aestivume0
- Treatment
- Under heat stresse3
- Gene
- TaHST2e3
- Outcome
- grain fillinge3
- Direction
- fastere3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“we identified and fine-mapped a wheat HST locus, TaHST2”
e3“Under heat stress, TaHST2 confers a superior conversion rate from soluble sugars to starch in wheat grains, resulting in faster grain filling and a higher yield potential”
Claim · model-written summary
Under heat stress, TaHST2 gives a higher yield potential in wheat.
- Taxon
- wheatTriticum aestivume0
- Treatment
- Under heat stresse3
- Gene
- TaHST2e3
- Outcome
- yield potentiale3
- Direction
- highere3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“we identified and fine-mapped a wheat HST locus, TaHST2”
e3“Under heat stress, TaHST2 confers a superior conversion rate from soluble sugars to starch in wheat grains, resulting in faster grain filling and a higher yield potential”
Claim · model-written summary
TaHST2 underwent strong artificial selection during wheat domestication.
- Taxon
- wheatTriticum aestivume0
- Gene
- TaHST2e4
- Outcome
- strong artificial selectione4
- Qualifier
- during wheat domesticatione4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“we identified and fine-mapped a wheat HST locus, TaHST2”
e4“TaHST2 underwent strong artificial selection during wheat domestication”
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See all 309 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.