Abstract
Wheat is an important cereal crop constrained by several biotic and abiotic stresses including drought stress. Understating the effect of drought stress and the genetic basis of stress tolerance is important to develop drought resilient, high-yielding wheat cultivars. In this study, we investigated the effects of drought stress on seedling characteristics in an association panel consisting of 198 germplasm lines. Our findings revealed that drought stress had a detrimental effect on all the seedling characteristics under investigation with a maximum effect on shoot length (50.94% reduction) and the minimum effect on germination percentage (7.9% reduction). To gain a deeper understanding, we conducted a genome-wide association analysis using 12,511 single nucleotide polymorphisms (SNPs), which led to the identification of 39 marker-trait associations (MTAs). Of these 39 MTAs, 13 were particularly noteworthy as they accounted for >10% of the phenotypic variance with a LOD score >5. These high-confidence MTAs were further utilized to extract 216 candidate gene (CGs) models within 1 Mb regions. Gene annotation and functional characterization identified 83 CGs with functional relevance to drought stress. These genes encoded the WD40 repeat domain, Myb/SANT-like domain, WSD1-like domain, BTB/POZ domain, Protein kinase domain, Cytochrome P450, Leucine-rich repeat domain superfamily, BURP domain, Calmodulin-binding protein60, Ubiquitin-like domain, etc. Findings from this study hold significant promise for wheat breeders as they provide direct assistance in selecting lines harboring favorable alleles for improved drought stress tolerance. Additionally, the identified SNPs and CGs will enable marker-assisted selection of potential genomic regions associated with enhanced drought stress tolerance in wheat.
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Claims 9
Claim · model-written summary
Drought stress reduced shoot length in wheat seedlings by 50.94%, the largest effect among the seedling traits.
- Taxon
- Wheat
Triticum aestivume0 - Treatment
- drought stresse1
- Outcome
- shoot lengthe1
- Direction
- reductione1
- Value
- 50.94%e1
- Qualifier
- maximum effecte1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Wheat is an important cereal crop constrained by several biotic and abiotic stresses including drought stress”
e1“Our findings revealed that drought stress had a detrimental effect on all the seedling characteristics under investigation with a maximum effect on shoot length (50.94% reduction) and the minimum effect on germination percentage (7.9% reduction)”
Claim · model-written summary
Drought stress reduced germination percentage in wheat by 7.9%, the smallest effect among the seedling traits.
- Taxon
- WheatTriticum aestivume0
- Treatment
- drought stresse1
- Outcome
- germination percentagee1
- Direction
- reductione1
- Value
- 7.9%e1
- Qualifier
- minimum effecte1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Wheat is an important cereal crop constrained by several biotic and abiotic stresses including drought stress”
e1“Our findings revealed that drought stress had a detrimental effect on all the seedling characteristics under investigation with a maximum effect on shoot length (50.94% reduction) and the minimum effect on germination percentage (7.9% reduction)”
Claim · model-written summary
Drought stress had a detrimental effect on all the seedling characteristics of wheat.
- Taxon
- WheatTriticum aestivume0
- Treatment
- drought stresse1
- Outcome
- seedling characteristicse1
- Direction
- detrimental effecte1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Wheat is an important cereal crop constrained by several biotic and abiotic stresses including drought stress”
e1“Our findings revealed that drought stress had a detrimental effect on all the seedling characteristics under investigation with a maximum effect on shoot length (50.94% reduction) and the minimum effect on germination percentage (7.9% reduction)”
Claim · model-written summary
The genome-wide association analysis identified 39 marker-trait associations in wheat.
- Taxon
- WheatTriticum aestivume0
- Outcome
- marker-trait associationse2
- Value
- 39 marker-trait associationse2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Wheat is an important cereal crop constrained by several biotic and abiotic stresses including drought stress”
e2“we conducted a genome-wide association analysis using 12,511 single nucleotide polymorphisms (SNPs), which led to the identification of 39 marker-trait associations (MTAs)”
Claim · model-written summary
13 of the 39 marker-trait associations accounted for more than 10% of the phenotypic variance, with a LOD score above 5.
- Taxon
- WheatTriticum aestivume0
- Outcome
- phenotypic variancee3
- Value
- >10%e3
- Qualifier
- with a LOD score >5e3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Wheat is an important cereal crop constrained by several biotic and abiotic stresses including drought stress”
e3“Of these 39 MTAs, 13 were particularly noteworthy as they accounted for >10% of the phenotypic variance with a LOD score >5”
Claim · model-written summary
216 candidate gene models were extracted within 1 Mb regions around the high-confidence marker-trait associations in wheat.
- Taxon
- WheatTriticum aestivume0
- Outcome
- candidate gene (CGs) modelse4
- Value
- 216e4
- Qualifier
- within 1 Mb regionse4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Wheat is an important cereal crop constrained by several biotic and abiotic stresses including drought stress”
e4“These high-confidence MTAs were further utilized to extract 216 candidate gene (CGs) models within 1 Mb regions”
Claim · model-written summary
83 candidate genes had functional relevance to drought stress in wheat.
- Taxon
- WheatTriticum aestivume0
- Outcome
- CGs with functional relevance to drought stresse5
- Value
- 83 CGse5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Wheat is an important cereal crop constrained by several biotic and abiotic stresses including drought stress”
e5“Gene annotation and functional characterization identified 83 CGs with functional relevance to drought stress”
Claim · model-written summary
The candidate genes encoded protein domains including WD40 repeat, Myb/SANT-like, BTB/POZ, protein kinase, cytochrome P450, and ubiquitin-like domains.
- Taxon
- WheatTriticum aestivume0
- Outcome
- genes encodede6
- Qualifier
- WD40 repeat domain, Myb/SANT-like domain, WSD1-like domain, BTB/POZ domain, Protein kinase domain, Cytochrome P450, Leucine-rich repeat domain superfamily, BURP domain, Calmodulin-binding protein60, Ubiquitin-like domain, etc.e6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Wheat is an important cereal crop constrained by several biotic and abiotic stresses including drought stress”
e6“These genes encoded the WD40 repeat domain, Myb/SANT-like domain, WSD1-like domain, BTB/POZ domain, Protein kinase domain, Cytochrome P450, Leucine-rich repeat domain superfamily, BURP domain, Calmodulin-binding protein60, Ubiquitin-like domain, etc.”
Claim · model-written summary
The identified SNPs and candidate genes will enable marker-assisted selection for drought stress tolerance in wheat.
- Taxon
- wheatTriticum aestivume7
- Outcome
- marker-assisted selectione7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e7“the identified SNPs and CGs will enable marker-assisted selection of potential genomic regions associated with enhanced drought stress tolerance in wheat”
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drought · growth · Triticum aestivum (wheat)Positive and negative results
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