Abstract
Conventional breeding relies on genetic variability in crop germplasm and wild species. This study evaluated 137 barley Recombinant Chromosome Substitution Lines (RCSLs), originating from crossing a drought and salinity-tolerant wild Hordeum spontaneum with the high-quality malting H. vulgare cv. Harrington. The objectives of this work were to i) improve understanding of the genetic diversity and introgression levels in RCSLs using a comprehensive set of high-density single nucleotide polymorphism (SNP) markers; ii) investigate the phenotypic variability of physiological, agronomic, and malting quality traits in RCSLs under rainfed and fully irrigated conditions; iii) unravel the relationship between these traits and the resilience of crops in drought-prone regions; and iv) identify specific SNPs associated with both drought tolerance indices and malting quality traits. Variability in physiological, agronomic, and malting quality traits was examined under rainfed and irrigated conditions, aiming to identify specific SNPs associated with both drought tolerance indices and malting quality traits. Additionally, a subset of three recombinant lines and the parent cv. Harrington was tested in growth chambers under well-watered and water-limited conditions. Agronomic traits were influenced by genotype-by-environment interaction, with notable drought tolerance lines. The grain yield was significantly correlated with yield-related traits and carbon isotope discrimination in grains. Drought stress impacted agronomic and physiological traits, with a strong reduction in leaf gas exchange and chlorophyll and protein content. The H. spontaneum genome introgression into H. vulgare cv. Harrington varied across 137 RCSLs, averaging 13.0 %. Associations between traits and genetic markers were found, particularly for the stress tolerance index in chromosome 1H and for grain quality traits (alfa-amylase, wort color, and protein) in chromosomes 1H, 4H, and 5H. These findings uncovered valuable barley RCSLs that demonstrate drought tolerance, offering promising prospects for breeding programs targeted at improving stress resilience.
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Claims 7
Claim · model-written summary
Grain yield was significantly correlated with yield-related traits and with carbon isotope discrimination in grains.
- Taxon
- H. vulgare
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Hordeum vulgaree3 - Organ / stage
- grainse2
- Outcome
- grain yielde2
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e3“The H. spontaneum genome introgression into H. vulgare cv. Harrington varied across 137 RCSLs, averaging 13.0 %”
e2“The grain yield was significantly correlated with yield-related traits and carbon isotope discrimination in grains”
Claim · model-written summary
Drought stress strongly reduced leaf gas exchange, chlorophyll content and protein content relative to well-watered conditions.
- Taxon
- H. vulgareHordeum vulgaree3
- Treatment
- Drought stresse1
- Outcome
- leaf gas exchange and chlorophyll and protein contente1
- Direction
- reductione1
- Comparator
- well-waterede6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“The H. spontaneum genome introgression into H. vulgare cv. Harrington varied across 137 RCSLs, averaging 13.0 %”
e1“Drought stress impacted agronomic and physiological traits, with a strong reduction in leaf gas exchange and chlorophyll and protein content”
e6“Additionally, a subset of three recombinant lines and the parent cv. Harrington was tested in growth chambers under well-watered and water-limited conditions”
Claim · model-written summary
The H. spontaneum genome introgression averaged 13.0% across 137 RCSLs.
- Taxon
- H. vulgareHordeum vulgaree3
- Material
- RCSLse3
- Outcome
- H. spontaneum genome introgressione3
- Value
- 13.0 %e3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“The H. spontaneum genome introgression into H. vulgare cv. Harrington varied across 137 RCSLs, averaging 13.0 %”
Claim · model-written summary
The stress tolerance index was associated with markers on chromosome 1H.
- Taxon
- H. vulgareHordeum vulgaree3
- Gene
- chromosome 1He4
- Outcome
- stress tolerance indexe4
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“The H. spontaneum genome introgression into H. vulgare cv. Harrington varied across 137 RCSLs, averaging 13.0 %”
e4“Associations between traits and genetic markers were found, particularly for the stress tolerance index in chromosome 1H and for grain quality traits (alfa-amylase, wort color, and protein) in chromosomes 1H, 4H, and 5H”
Claim · model-written summary
Grain quality traits (alfa-amylase, wort color and protein) were associated with markers on chromosomes 1H, 4H and 5H.
- Taxon
- H. vulgareHordeum vulgaree3
- Gene
- chromosomes 1H, 4H, and 5He4
- Outcome
- grain quality traitse4
- Qualifier
- alfa-amylase, wort color, and proteine4
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“The H. spontaneum genome introgression into H. vulgare cv. Harrington varied across 137 RCSLs, averaging 13.0 %”
e4“Associations between traits and genetic markers were found, particularly for the stress tolerance index in chromosome 1H and for grain quality traits (alfa-amylase, wort color, and protein) in chromosomes 1H, 4H, and 5H”
Claim · model-written summary
Agronomic traits were influenced by genotype-by-environment interaction, with some RCSLs notably drought tolerant.
- Taxon
- H. vulgareHordeum vulgaree3
- Outcome
- agronomic traitse0
- Qualifier
- genotype-by-environment interactione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“The H. spontaneum genome introgression into H. vulgare cv. Harrington varied across 137 RCSLs, averaging 13.0 %”
e0“Agronomic traits were influenced by genotype-by-environment interaction, with notable drought tolerance lines”
Claim · model-written summary
Valuable barley RCSLs demonstrating drought tolerance were identified.
- Taxon
- H. vulgareHordeum vulgaree3
- Material
- barley RCSLse5
- Outcome
- drought tolerancee5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“The H. spontaneum genome introgression into H. vulgare cv. Harrington varied across 137 RCSLs, averaging 13.0 %”
e5“These findings uncovered valuable barley RCSLs that demonstrate drought tolerance”
The same questions in other papers
drought · physiology: gas exchange · Hordeum vulgare (barley)Positive and negative results
14 papers in the same direction as this paper · 2 in the opposite direction
- negative
- positive
- positive
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