Quantitative trait loci for salinity tolerance in barley (Hordeum vulgare L.)

Zhou, Gaofeng; Johnson, Peter; Ryan, Peter R.; Delhaize, Emmanuel; Zhou, Meixue

doi:10.1007/s11032-011-9559-9

Cited by 72 publications

(90 citation statements)

References 49 publications

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“…In our potting mixture experiment, one single QTL was identified on 2H. The position with the nearest marker of bPb-6792 which is located at 17.7 cM of the consensus map [32] is different from previously reported QTLs on 2H with the nearest marker of bPb-5629 which is located at 56.2 cM of the consensus map [23], [32]. In the current hydroponic experiment, various traits have been used to indicating the tolerance to salinity.…”

Section: Discussionmentioning

confidence: 54%

A Single Locus Is Responsible for Salinity Tolerance in a Chinese Landrace Barley (Hordeum vulgare L.)

Wang

et al. 2012

PLoS ONE

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IntroductionSalinity and waterlogging are two major abiotic stresses severely limiting barley production. The lack of a reliable screening method makes it very hard to improve the tolerance through breeding programs.MethodsThis work used 188 DH lines from a cross between a Chinese landrace variety, TX9425 (waterlogging and salinity tolerant), and a Japanese malting barley, Naso Nijo (waterlogging and salinity sensitive), to identify QTLs associated with the tolerance.ResultsFour QTLs were found for waterlogging tolerance. The salinity tolerance was evaluated with both a hydroponic system and in potting mixture. In the trial with potting mixture, only one major QTL was identified to associate with salinity tolerance. This QTL explained nearly 50% of the phenotypic variation, which makes it possible for further fine mapping and cloning of the gene. This QTL was also identified in the hydroponic experiment for different salt-related traits. The position of this QTL was located at a similar position to one of the major QTLs for waterlogging tolerance, indicating the possibility of similar mechanisms controlling both waterlogging and salinity tolerance.ConclusionThe markers associated with the QTL provided a unique opportunity in breeding programs for selection of salinity and waterlogging tolerance.

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Section: Discussionmentioning

confidence: 54%

A Single Locus Is Responsible for Salinity Tolerance in a Chinese Landrace Barley (Hordeum vulgare L.)

Wang

et al. 2012

PLoS ONE

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“…No apparent symptoms of leaf chlorosis were found in plants grown under control conditions that were irrigated with tap water (Online Resource 1a) but 5 weeks of salinity treatment resulted in a clear differentiation between varieties (Online Resource 1b). The visual symptoms of salinity damage were scored as the damage index on zero to ten scale (0-no visual symptoms of damage; 10-plants are dead) using criteria such as the extent of leaf chlorosis, numbers of dead leaves, and plant survival rate (Zhou et al 2011;Wu et al 2014; Online Resource 2). Each data point of the salt stress-induced damage index was an average from 8 seedlings in a pot.…”

Section: Glasshouse Experiments and Overall Salt Tolerance Evaluationmentioning

confidence: 99%

Developing and validating a high-throughput assay for salinity tissue tolerance in wheat and barley

Shabala

Zhou

et al. 2015

Planta

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Leaf tissue tolerance was strongly and positively correlated with overall salt tolerance in barley, but not in wheat where the inability of sensitive varieties to exclude Na(+) is compensated by their better ability to handle Na(+) accumulated in the shoot via tissue tolerance mechanisms. A new high-throughput assay was developed to use the excised leaves to eliminate the confounding contribution of sodium exclusion mechanisms and evaluate genetic variability in salinity tissue tolerance in a large number of wheat (Triticum aestivum and Triticum turgidum ssp. durum) and barley (Hordeum vulgare) accessions. The changes in relative chlorophyll content (measured as chlorophyll content index, CCI) in excised leaves exposed to 50 mM NaCl for 48 h were found to be a reliable indicator of leaf tissue tolerance. In both wheat and barley, relative CCI correlated strongly with the overall plant salinity tolerance (evaluated in glasshouse experiments). To a large extent, this tissue tolerance was related to more efficient vacuolar Na(+) sequestration in leaf mesophyll, as revealed by fluorescent Na(+) dye imaging experiments. However, while in barley this correlation was positive, tissue tolerance in wheat correlated negatively with overall salinity tolerance. As a result, more salt-sensitive durum wheat genotypes possessed higher tissue tolerance than bread wheat plants, and this negative correlation was present within each of bread and durum wheat clusters as well. Overall, these results indicate that the lack of effective Na(+) exclusion ability in sensitive wheat varieties is compensated by their better ability to handle Na(+) accumulated in the shoot via tissue tolerance mechanisms. Implications of these findings for plant breeding for salinity tolerance are discussed.

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“…Salinity tolerance score, assessed through the combination of plant survival and leaf wilting, has been used for evaluating barley salt tolerance in our previous studies [35, 38, 54]. Crop yield under salinity stress is a result of balancing resource allocation between growth and defence against stress, since responding to stress is deleterious to growth and yield [55]; therefore, the ability to produce high grain yield in saline soils is the ultimate criterion of salinity tolerance.…”

Section: Discussionmentioning

confidence: 99%

“…Using various genetic populations, some QTLs for salinity tolerance in barley have been found and are associated with chlorophyll content, chlorophyll fluorescence, proline content, water soluble carbohydrates, relative water content [56], ion content [57, 58], and salinity tolerance [35, 38, 54, 59]. Previous QTL studies of barley salinity tolerance have lacked information on the genetic mechanisms underlying stomatal traits and gas exchange parameters.…”

Section: Discussionmentioning

confidence: 99%

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QTLs for stomatal and photosynthetic traits related to salinity tolerance in barley

et al. 2017

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BackgroundStomata regulate photosynthesis and transpiration, and these processes are critical for plant responses to abiotic stresses such as salinity. A barley double haploid population with 108 lines derived from a cross between CM72 (salt-tolerant) and Gairdner (salt-sensitive) was used to detect quantitative trait loci (QTLs) associated with stomatal and photosynthetic traits related to salinity tolerance.ResultsA total of 11 significant QTLs (LOD > 3.0) and 11 tentative QTLs (2.5 < LOD < 3.0) were identified. These QTLs are distributed on all the seven chromosomes, except 5H and explain 9.5–17.3% of the phenotypic variation. QTLs for biomass, intercellular CO2 concentration, transpiration rate and stomatal conductance under control conditions co-localised together. A QTL for biomass also co-located with one for transpiration rate under salinity stress. A linkage was found between stomatal pore area and gas exchange. A QTL for salinity tolerance also co-localised with QTLs for grain yield and biomass on chromosome 3H. Based on the draft barley genome, the candidate genes for salinity tolerance at this locus are proposed.ConclusionsThe lack of major QTLs for gas exchange and stomatal traits under control and saline conditions indicates a complex relationship between salinity and leaf gas exchange due to the fact that these complex quantitative traits are under the control of multiple genes.Electronic supplementary materialThe online version of this article (doi:10.1186/s12864-016-3380-0) contains supplementary material, which is available to authorized users.

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Quantitative trait loci for salinity tolerance in barley (Hordeum vulgare L.)

Cited by 72 publications

References 49 publications

A Single Locus Is Responsible for Salinity Tolerance in a Chinese Landrace Barley (Hordeum vulgare L.)

A Single Locus Is Responsible for Salinity Tolerance in a Chinese Landrace Barley (Hordeum vulgare L.)

Developing and validating a high-throughput assay for salinity tissue tolerance in wheat and barley

QTLs for stomatal and photosynthetic traits related to salinity tolerance in barley

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