Abstract
Salt stress is one of the major constraints plaguing the global agriculture sector, severely undermining food and nutritional security. Accelerated soil salinization driven by climate change and rising temperatures has increasingly affected wheat productivity and grain quality. In the present study, the impact of sodic stress on yield-related and biochemical traits was evaluated in a population of recombinant inbred lines (RILs) derived from a cross between a salt-tolerant cultivar (KH 65) and a salt-sensitive cultivar (HD 2009). The tolerant parent, KH 65, has been widely utilized in breeding programs worldwide for developing salt-tolerant wheat varieties. Under sodic conditions, the sensitive cultivar HD 2009 cultivar exhibited a markedly higher grain yield reduction (44.19%) compared to KH 65 (10.81%). The estimated heritability (h 2 ) values ranged from 0.52 for potassium (K + ) content to 0.95 for days to anthesis (DTA), indicating a broad spectrum of genetic control among the evaluated traits. Grain yield (GY) trait showed significant positive genotypic correlations (p < 0.01) with thousand-grain weight (TGW), tiller number (TN), number of ears (NE), ear length (LE), plant height (PH), proline content, and potassium (K + ) content, while exhibiting a significant negative correlation with sodium (Na + ) content. Biochemical parameters were assessed in the flag leaf, while yield-related traits were measured at maturity. Multiple regression analysis revealed that proline and K + content accounted for 58.5% and 38.1% of the total variability in grain yield, respectively (multiple R = 0.46). The key contributors to grain yield under sodic stress followed the order: proline > K + > K + /Na + ratio > NE. Principal component and cluster analyses further identified K + content, K + /Na + ratio, and proline content as major determinants of yield performance under sodic stress. Their strong positive association with grain yield, coupled with high heritability, underscores their potential as reliable selection criteria for breeding salt-tolerant wheat cultivars.
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Claims 13
Claim · model-written summary
Under sodic conditions the salt-sensitive wheat cultivar HD 2009 showed a grain yield reduction of 44.19%, markedly higher than that of KH 65.
- Taxon
- bread wheat
Triticum aestivume1 - Material
- HD 2009e0
- Treatment
- sodic conditionse0
- Outcome
- grain yield reductione0
- Direction
- reductione0
- Value
- 44.19%e0
- Qualifier
- markedly highere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Under sodic conditions, the sensitive cultivar HD 2009 cultivar exhibited a markedly higher grain yield reduction (44.19%) compared to KH 65 (10.81%)”
e1“bread wheat”
Claim · model-written summary
Under sodic conditions the salt-tolerant wheat cultivar KH 65 showed a grain yield reduction of 10.81%.
- Taxon
- bread wheatTriticum aestivume1
- Material
- KH 65e0
- Treatment
- sodic conditionse0
- Outcome
- grain yield reductione0
- Direction
- reductione0
- Value
- 10.81%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Under sodic conditions, the sensitive cultivar HD 2009 cultivar exhibited a markedly higher grain yield reduction (44.19%) compared to KH 65 (10.81%)”
e1“bread wheat”
Claim · model-written summary
Estimated heritability of the evaluated traits in the wheat RIL population ranged from 0.52 for potassium content to 0.95 for days to anthesis.
- Taxon
- bread wheatTriticum aestivume1
- Outcome
- heritability (h 2 ) valuese0
- Value
- 0.52 for potassium (K + ) content to 0.95 for days to anthesis (DTA)e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The estimated heritability (h 2 ) values ranged from 0.52 for potassium (K + ) content to 0.95 for days to anthesis (DTA)”
e1“bread wheat”
Claim · model-written summary
Grain yield of the wheat RILs had significant positive genotypic correlations (p < 0.01) with thousand-grain weight, tiller number and number of ears.
- Taxon
- bread wheatTriticum aestivume2
- Material
- recombinant inbred lines (RILs)e1
- Outcome
- Grain yield (GY)e0
- Direction
- positivee0
- Qualifier
- thousand-grain weight (TGW), tiller number (TN), number of ears (NE)e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Grain yield (GY) trait showed significant positive genotypic correlations (p < 0.01) with thousand-grain weight (TGW), tiller number (TN), number of ears (NE)”
e1“recombinant inbred lines (RILs)”
e2“bread wheat”
Claim · model-written summary
Grain yield of the wheat RILs had significant positive genotypic correlations (p < 0.01) with ear length and plant height.
- Taxon
- bread wheatTriticum aestivume2
- Material
- recombinant inbred lines (RILs)e1
- Outcome
- Grain yield (GY)e0
- Direction
- positivee0
- Qualifier
- ear length (LE), plant height (PH)e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Grain yield (GY) trait showed significant positive genotypic correlations (p < 0.01) with thousand-grain weight (TGW), tiller number (TN), number of ears (NE), ear length (LE), plant height (PH)”
e1“recombinant inbred lines (RILs)”
e2“bread wheat”
Claim · model-written summary
Grain yield of the wheat RILs had a significant positive genotypic correlation (p < 0.01) with proline content.
- Taxon
- bread wheatTriticum aestivume1
- Compound
- prolinee0
- Outcome
- Grain yield (GY)e0
- Direction
- positivee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Grain yield (GY) trait showed significant positive genotypic correlations (p < 0.01) with thousand-grain weight (TGW), tiller number (TN), number of ears (NE), ear length (LE), plant height (PH), proline content, and potassium (K + ) content”
e1“bread wheat”
Claim · model-written summary
Grain yield of the wheat RILs had a significant positive genotypic correlation (p < 0.01) with potassium content.
- Taxon
- bread wheatTriticum aestivume1
- Compound
- potassium (K + )e0
- Outcome
- Grain yield (GY)e0
- Direction
- positivee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Grain yield (GY) trait showed significant positive genotypic correlations (p < 0.01) with thousand-grain weight (TGW), tiller number (TN), number of ears (NE), ear length (LE), plant height (PH), proline content, and potassium (K + ) content”
e1“bread wheat”
Claim · model-written summary
Grain yield of the wheat RILs had a significant negative genotypic correlation with sodium content.
- Taxon
- bread wheatTriticum aestivume1
- Compound
- sodium (Na + )e0
- Outcome
- Grain yield (GY)e0
- Direction
- negativee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Grain yield (GY) trait showed significant positive genotypic correlations (p < 0.01) with thousand-grain weight (TGW), tiller number (TN), number of ears (NE), ear length (LE), plant height (PH), proline content, and potassium (K + ) content, while exhibiting a significant negative correlation with sodium (Na + ) content”
e1“bread wheat”
Claim · model-written summary
In multiple regression, proline content accounted for 58.5% of the total variability in wheat grain yield.
- Taxon
- bread wheatTriticum aestivume1
- Compound
- prolinee0
- Outcome
- total variability in grain yielde0
- Value
- 58.5%e0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Multiple regression analysis revealed that proline and K + content accounted for 58.5% and 38.1% of the total variability in grain yield, respectively (multiple R = 0.46)”
e1“bread wheat”
Claim · model-written summary
In multiple regression, potassium content accounted for 38.1% of the total variability in wheat grain yield.
- Taxon
- bread wheatTriticum aestivume1
- Compound
- K +e0
- Outcome
- total variability in grain yielde0
- Value
- 38.1%e0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Multiple regression analysis revealed that proline and K + content accounted for 58.5% and 38.1% of the total variability in grain yield, respectively (multiple R = 0.46)”
e1“bread wheat”
Claim · model-written summary
The key contributors to wheat grain yield under sodic stress ranked proline > K+ > K+/Na+ ratio > number of ears.
- Taxon
- bread wheatTriticum aestivume1
- Treatment
- sodic stresse0
- Outcome
- key contributors to grain yielde0
- Qualifier
- proline > K + > K + /Na + ratio > NEe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The key contributors to grain yield under sodic stress followed the order: proline > K + > K + /Na + ratio > NE”
e1“bread wheat”
Claim · model-written summary
Principal component and cluster analyses identified K+ content, K+/Na+ ratio and proline content as major determinants of wheat yield performance under sodic stress.
- Taxon
- bread wheatTriticum aestivume1
- Treatment
- sodic stresse0
- Outcome
- major determinants of yield performancee0
- Qualifier
- K + content, K + /Na + ratio, and proline contente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Principal component and cluster analyses further identified K + content, K + /Na + ratio, and proline content as major determinants of yield performance under sodic stress”
e1“bread wheat”
Claim · model-written summary
The authors conclude that K+ content, K+/Na+ ratio and proline, strongly associated with grain yield and highly heritable, are potential reliable selection criteria for breeding salt-tolerant wheat.
- Taxon
- wheatTriticum aestivume0
- Outcome
- reliable selection criteriae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Their strong positive association with grain yield, coupled with high heritability, underscores their potential as reliable selection criteria for breeding salt-tolerant wheat cultivars”
The same questions in other papers
salinity · yield · Triticum aestivum (wheat)Positive and negative results
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