Agronomic and genetic assessment of terminal drought tolerance in two‐row spring barley

Gordon, Tyler; Wang, Rui; Bowman, Brian C.; Klassen, Natalie; Wheeler, Julia A.; Bonman, J. M.; Bockelman, Harold E.; Chen, Jianli

doi:10.1002/csc2.20040

Cited by 6 publications

(5 citation statements)

References 38 publications

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“…1); which indicates the importance of the locus to govern multiple traits. Gordon et al (2020) also detected the association of multiple traits such as heading date, plant height, and kernel length on chromosome 2H at 27.2-29.8 Mbp in field drought stress experiments. Such effects may be due to the tight linkage of genes or the pleiotropic effect of a single gene (Hall et al 2006).…”

Section: Discussionmentioning

confidence: 86%

Genome wide association study of Ethiopian barley for terminal drought stress tolerance under field and climate chamber conditions

Teklemariam,

Bayissa,

Matros

et al. 2023

CEREAL RESEARCH COMMUNICATIONS

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In order to detect markers for drought stress tolerance, field experiments in Ethiopia were conducted for three years at two naturally drought-prone locations and two optimum moisture locations using 239 Ethiopian barley landraces and 21 barley breeding lines. Furthermore, a climate chamber experiment applying drought stress at different water regimes (70% soil water capacity (WC) for control and 20% WC for drought stress conditions) after flowering was conducted for selected 196 accessions. Results revealed reduced grain biomass by 47% and 80% under field and climate chamber conditions, respectively, as well as significantly (p < 0.05) reduced days to maturity and plant height, in both experimental designs. Based on 10,644 SNP markers, GWAS was conducted to identify marker trait associations (MTA) for drought stress tolerance. For days to maturity, relative chlorophyll content, plant height, number of seeds per spike, thousand kernel weight, and harvest index under field and climate chamber drought stress treatments, 58 significant MTAs were identified. In total, 41.4% of the MTAs were located on chromosome 2H, of which one is very close to the Ppd-H1 flowering locus. These findings underpin the importance of this genome region for drought tolerance. Another MTA on chromosome 1H was detected for days to maturity under field drought stress treatment in the vicinity of the known flowering time ELF3 gene. Additionally, 13 and 3 Ethiopian landraces that tolerate severe and moderate drought stress in climate chamber and field experiments were identified, respectively, using drought indices. The results highlight the tolerance of Ethiopian landraces to different levels of drought stress as well as their potential to be considered in future barley improvement programs.

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Section: Discussionmentioning

confidence: 86%

Genome wide association study of Ethiopian barley for terminal drought stress tolerance under field and climate chamber conditions

Teklemariam,

Bayissa,

Matros

et al. 2023

CEREAL RESEARCH COMMUNICATIONS

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“…Gordon et al. (2020) evaluated a large number of barley genotypes and found clear genotype variation with specific selections maintaining lower protein under terminal drought. Additionally, N applications were controlled at a single rate in the study and lower N rates could be further researched as they have been shown to positively reduce grain protein; however, these N reductions can also negatively affect yield.…”

Section: Resultsmentioning

confidence: 99%

Deficit irrigation effects on adjunct and all‐malt barley yield and quality

Rogers

Hu²,

King

2023

Agronomy Journal

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Semiarid regions are reliant on irrigation to produce large-yielding and high-quality malt barley (Hordeum vulgare L.). Drought in the western United States is of concern as surface and ground water reductions are occurring that affect irrigation water availability. Implementing a seasonal water deficit compared to evapotranspiration (ET) is a potential strategy to reduce water usage if yield and quality can be maintained. Research was conducted in Aberdeen, ID, on the effects of deficit irrigation on yield, grain quality, and malt characteristics. Five genotypes were selected to represent those used for large-scale adjunct brewing and those targeted at the all-malt craft industry. Irrigation was managed at three rates (100%, 75%, and 50%) of estimated crop evapotranspiration (ET c ) using sprinkler irrigation. Total aboveground dry matter was not affected by irrigation until soft dough (Feekes 11.2). Yield was similar within a genotype with irrigation reduction from 100% ET c to 75% ET c . Averaged across genotypes, yields were 6936 kg ha −1 at 100% ET c and 6297 kg ha −1 at 75% ET c . At 75% ET c , protein remained just below the adjunct target (130 g kg −1 ) for four of five genotypes while all five exceeded the all-malt target (120 g kg −1 ). Reduced irrigation decreased malt extract and increased diastatic power, where β-glucan either did not differ or increased. Deficit irrigation is promising, particularly for adjunct brewing; however, expected changes to malting quality must be understood and genotype selection, altered fertilizer management, and/or changes to malting criteria may be needed for implementation. INTRODUCTIONBarley in the western United States is predominately tworow type produced for the end-use of malting and brewing.

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“…Gordon et al. (2020) identified QTLs near the QGF‐7H locus as being associated with measures of barley seed size under terminal drought conditions. An early start to the grain fill period could be particularly beneficial for starch accumulation in environments such as Havre that depend on finite stores of soil moisture.…”

Section: Discussionmentioning

confidence: 99%

“…The Pauli study also mapped plump and test weight near both loci, as well as multiple direct measures of malt quality such as betaglucan content, free amino nitrogen, and malt extract near QGFhd-2H. Gordon et al (2020) identified QTLs near the QGF-7H locus as being associated with measures of barley seed size under terminal drought conditions. An early start to the grain fill period could be particularly beneficial for starch accumulation in environments such as Havre that depend on finite stores of soil moisture.…”

Section: Earlier Headingmentioning

confidence: 99%

“…In barley, the grain fill phase when the plant is accumulating starch and protein in the seed endosperm begins with heading and ends with maturity (Alqudah & Schnurbush, 2017). While barley has a reputation as a relatively drought‐tolerant crop, terminal drought conditions coinciding with grain fill negatively impact yield and malt quality parameters due to decreased starch accumulation, resulting in higher protein content and thinner grains (Gordon et al., 2020; Tarawneh et al., 2020). Many malt growers mitigate a lack of precipitation during grain fill with irrigation.…”

Section: Introductionmentioning

confidence: 99%

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QTL mapping reveals malt barley quality improvement in two dryland environments associated with extended grain fill and seminal root traits

Williams,

Lamb,

Lutgen

et al. 2024

Crop Science

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To achieve malt grade and receive full price, barley (Hordeum vulgare L.) crops must meet standards for certain quality traits including percent plump and protein. Terminal drought stress reduces quality and is projected to worsen in barley cultivation areas, underscoring the need for varieties that maintain good malt production with unreliable precipitation. The stay‐green trait extends the grain fill phase between heading and maturity and has been linked to stable quality under dry conditions. However, this relationship can be inconsistent and is not well understood. To effectively leverage a longer grain fill phenotype for drought adaptation, a better grasp of its genetics and environmental interaction is needed. Stay‐green root system differences have been observed and could be at play. We performed correlation and quantitative trait locus (QTL) analysis on grain fill duration, grain quality, and seminal root traits using a recombinant inbred line (RIL) population segregating for stay‐green. Agronomic data were collected in four field trials at two distinct semiarid locations, and roots were measured in a greenhouse assay. Earlier heading and later maturity led to improved quality in both locations and more consistent quality between locations. Earlier heading had a greater influence on quality in the drier environment, while later maturity was more impactful in the less dry environment. We observed co‐locations of seminal root trait QTLs with grain fill duration and grain quality. These QTLs lay the groundwork for further investigation into root phenotypes associated with stay‐green and the deployment of these traits in breeding for drought adaptation.

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Agronomic and genetic assessment of terminal drought tolerance in two‐row spring barley

Cited by 6 publications

References 38 publications

Genome wide association study of Ethiopian barley for terminal drought stress tolerance under field and climate chamber conditions

Genome wide association study of Ethiopian barley for terminal drought stress tolerance under field and climate chamber conditions

Deficit irrigation effects on adjunct and all‐malt barley yield and quality

QTL mapping reveals malt barley quality improvement in two dryland environments associated with extended grain fill and seminal root traits

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