Environment-oriented selection criteria to overcome controversies in breeding for drought resistance in wheat

Poggi, Giovanni Maria; Corneti, Simona; Aloisi, Iris; Ventura, Francesc

doi:10.1016/j.jplph.2022.153895

Cited by 5 publications

(4 citation statements)

References 172 publications

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“…This is particularly pronounced in field analysis, where the genotype × environment interaction reaches its peak complexity. As a result, currently, the assessment of drought susceptibility in the field often contradicts in vitro screenings, if based only on one or few biochemical markers [18].…”

Section: Resultsmentioning

confidence: 99%

“…Polyethylene glycol (PEG)-induced water stress has been widely used to screen wheat genotypes' sensitivity to drought at seedling stage, as these tests are quick, easy, and inexpensive to conduct [12,13]. Therefore, MDA content at seedling stage under PEG-induced stress conditions has been used as a criterion to phenotype wheat genotypes for drought tolerance [14][15][16][17], as high-molecular-weight PEG (PEG-6000) mimics drought conditions without altering plant hydraulic properties [18] and has been suggested as the most efficient for in vitro screenings [19][20][21]. Despite being widely used, the concentrations of PEG-6000 used for screening bread and durum wheat seedlings for DS resistance, assessed via morphological, physiological and biochemical assays (including MDA quantification), vary greatly, ranging from 100 g/L to even more than 300 g/L [12,15,[22][23][24].…”

Section: Introductionmentioning

confidence: 99%

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The Quest for Reliable Drought Stress Screening in Tetraploid Wheat (Triticum turgidum spp.) Seedlings: Why MDA Quantification after Treatment with 10% PEG-6000 Falls Short

Poggi,

Corneti,

Aloisi

2024

Life

Self Cite

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Drought stress poses significant productivity challenges to wheat. Several studies suggest that lower malondialdehyde (MDA) content may be a promising trait to identify drought-tolerant wheat genotypes. However, the optimal polyethylene glycol (PEG-6000) concentration for screening seedlings for drought tolerance based on MDA quantification is not clear. The aim of this study was to verify whether a 10% (w/v) PEG-6000 concentration-induced water stress was reliable for discriminating between twenty-two drought-susceptible and drought-tolerant tetraploid wheat (Triticum turgidum spp. durum, turanicum, and carthlicum) accessions based on MDA quantification. To do so, its correlation with morpho-physiological traits, notoriously related to seedling drought tolerance, i.e., Seedling Vigour Index and Seedling Water Content, was evaluated. Results showed that MDA content was not a reliable biomarker for drought tolerance, as it did not correlate significantly with the aforementioned morpho-physiological traits, which showed, on the contrary, high positive correlation with each other. Combining our study with the cited literature, it clearly emerges that different wheat genotypes have different “water stress thresholds”, highlighting that using a 10% PEG-6000 concentration for screening wheat seedlings for drought tolerance based on MDA quantification is not reliable. Given the conflicting results in the literature, this study provides important insights for selecting appropriate methods for evaluating wheat seedling drought tolerance.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

The Quest for Reliable Drought Stress Screening in Tetraploid Wheat (Triticum turgidum spp.) Seedlings: Why MDA Quantification after Treatment with 10% PEG-6000 Falls Short

Poggi,

Corneti,

Aloisi

2024

Life

Self Cite

View full text Add to dashboard Cite

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“…This confluence of issues tothreatens global food security and highlights the urgency of resolving the complicated mechanisms underlying drought tolerance in wheat [4]. Along with the increasing drought stress induced by global warming, the identification of accessions that exhibit tolerance to drought stress has been regarded as one of the most critical tasks for research into genetic improvement in wheat [5][6][7]. Therefore, dissecting wheat responses to drought stress is indispensable for the current and future improvement of wheat.…”

Section: Introductionmentioning

confidence: 99%

Impact of Drought Stress on Yield-Related Agronomic Traits of Different Genotypes in Spring Wheat

Xu,

Lai,

Ren

et al. 2023

Agronomy

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Drought stress is one of the major abiotic stresses to wheat worldwide, with negative effects on wheat growth and yield. Assessing genetic variation and drought stress tolerance of key agronomic and physiological traits of spring wheat and screening germplasm resources for higher drought tolerance and yield stability are a prerequisite for developing new, better-adapted spring wheat varieties. This study evaluated nine important agronomic and physiological traits in 152 spring wheat cultivars under non-stress (NS) and drought-stress (DS) conditions. Under DS conditions, grain yield per plot (GYP) and grain weight per spike (GWE) were significantly reduced by 33.8% and 31.7%, and their drought-tolerance indexes (DIs) were only 0.66 and 0.69, respectively, indicating that GYP and GWE are the most susceptible traits to drought stress. The SPAD value of flag leave at flowering stage decreased by 13.9% under DS conditions, and the DI of SPAD was 0.86. In addition, DI-SPAD was significantly positively correlated with DIs of plant height (PH), grain number per spikelet (GPS), grain number per spike (GNS), GWE and GYP, indicating that the drought tolerance and yield of wheat are closely related to chlorophyll retention. Six wheat germplasm accessions were identified for their ability to sustain grain yield and improve drought tolerance simultaneously. These results provide insights into the genetic co-variation between grain yield and drought stress tolerance and provide a theoretical basis for the development of new wheat cultivars with excellent drought tolerance and high yields in the presence and absence of drought.

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“…Assim como em outras culturas, o trigo também é fortemente influenciado por variações ambientais. Por exemplo, mudanças na quantidade de precipitação pluvial reduz a oferta de água às plantas, o que pode impactar em diversas variáveis, tais como em um menor índice de área foliar (IAF), número de grãos por espiga e peso de 1000 grãos, reduzindo consequentemente o rendimento final da cultura (POGGI et al, 2023). Em ambientes com menor quantidade de água disponível, espera-se que a interação genótipo × ambiente seja mais complexa, reduzindo-se a capacidade estatística de identificar genótipos superiores (CHENU et al, 2011).…”

Section: Trigo Durum (T Turgidum)unclassified

Análise AMMI e AMMI robusta em dados de trigo com observações discrepantes

Nascimento

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Agradeço à Deus, o ao autor e consumador de minha fé. Sem Ele, jamais poderia estar no lugar que estou.Agradeço à minha mãe, Maria Sulamita Nascimento, por todo o suporte, amor e carinho que sempre me deu durante toda a minha vida, inclusive durante este percurso acadêmico.Aos meus amados irmãos em Cristo Jesus, nosso Senhor, principalmente os da Assembleia de Deus em Santarém e os da Assembleia de Deus Ministério do Belém em Piracicaba, por todo o apoio e orações.Aos meus amigos que sempre me incentivaram e ficaram felizes com minhas conquistas.

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Environment-oriented selection criteria to overcome controversies in breeding for drought resistance in wheat

Cited by 5 publications

References 172 publications

The Quest for Reliable Drought Stress Screening in Tetraploid Wheat (Triticum turgidum spp.) Seedlings: Why MDA Quantification after Treatment with 10% PEG-6000 Falls Short

The Quest for Reliable Drought Stress Screening in Tetraploid Wheat (Triticum turgidum spp.) Seedlings: Why MDA Quantification after Treatment with 10% PEG-6000 Falls Short

Impact of Drought Stress on Yield-Related Agronomic Traits of Different Genotypes in Spring Wheat

Análise AMMI e AMMI robusta em dados de trigo com observações discrepantes

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