Performance and yield stability of doubled haploid population of wheat (Triticum aestivum L.) under high-temperature regime

Pankaj, Yaswant Kumar; Kumar, Rajeev; Pal, Lily; Gill, Kulvinder S.; Nagarajan, R.; Kumar, Vishal; Panigrahi, Sourav

doi:10.1007/s42976-022-00247-4

Cited by 5 publications

(2 citation statements)

References 42 publications

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“…Genome-wide association studies (GWAS) and quantitative trait loci (QTL) mapping have identified genetic loci associated with HST across all 21 chromosomes of wheat [26][27][28]. For instance, ten QTLs associated with leaf chlorophyll content, canopy temperature, thousandgrain weight, grain yield heading and maturity were found in a set of 166 doubled haploid lines under late sown conditions, and these QTLs could be targeted for genetic improvement and marker-assisted selection for heat tolerance in wheat [29].…”

Section: Introductionmentioning

confidence: 99%

Genome-wide association study for seedling heat tolerance under two temperature conditions in bread wheat (Triticum aestivum L.)

Fu,

Zhou,

Liu

et al. 2024

BMC Plant Biol

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Background As the greenhouse effect intensifies, global temperatures are steadily increasing, posing a challenge to bread wheat (Triticum aestivum L.) production. It is imperative to comprehend the mechanism of high temperature tolerance in wheat and implement breeding programs to identify and develop heat-tolerant wheat germplasm and cultivars. Results To identify quantitative trait loci (QTL) related to heat stress tolerance (HST) at seedling stage in wheat, a panel of 253 wheat accessions which were re-sequenced used to conduct genome-wide association studies (GWAS) using the factored spectrally transformed linear mixed models (FaST-LMM). For most accessions, the growth of seedlings was found to be inhibited under heat stress. Analysis of the phenotypic data revealed that under heat stress conditions, the main root length, total root length, and shoot length of seedlings decreased by 47.46%, 49.29%, and 15.19%, respectively, compared to those in normal conditions. However, 17 varieties were identified as heat stress tolerant germplasm. Through GWAS analysis, a total of 115 QTLs were detected under both heat stress and normal conditions. Furthermore, 15 stable QTL-clusters associated with heat response were identified. By combining gene expression, haplotype analysis, and gene annotation information within the physical intervals of the 15 QTL-clusters, two novel candidate genes, TraesCS4B03G0152700/TaWRKY74-B and TraesCS4B03G0501400/TaSnRK3.15-B, were responsive to temperature and identified as potential regulators of HST in wheat at the seedling stage. Conclusions This study conducted a detailed genetic analysis and successfully identified two genes potentially associated with HST in wheat at the seedling stage, laying a foundation to further dissect the regulatory mechanism underlying HST in wheat under high temperature conditions. Our finding could serve as genomic landmarks for wheat breeding aimed at improving adaptation to heat stress in the face of climate change.

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Section: Introductionmentioning

confidence: 99%

Genome-wide association study for seedling heat tolerance under two temperature conditions in bread wheat (Triticum aestivum L.)

Fu,

Zhou,

Liu

et al. 2024

BMC Plant Biol

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“…At present, the challenges of global climate change and population surge are becoming increasingly serious. The stability of wheat yields is the top priority to ensure world food security and economic development ( Pankaj et al., 2022 ). The yield and quality of wheat are severely affected by biotic and abiotic stresses such as disease, drought, high temperature, cold, high salinity and so on.…”

Section: Introductionmentioning

confidence: 99%

Genome-wide identification, characterization, evolution, and expression pattern analyses of the typical thioredoxin gene family in wheat (Triticum aestivum L.)

et al. 2022

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Typical thioredoxin (TRX) plays an important role in maintaining redox balance in plants. However, the typical TRX genes in wheat still need to be comprehensively and deeply studied. In this research, a total of 48 typical TaTRX genes belonging to eight subtypes were identified via a genome-wide search in wheat, and the gene structures, protein conserved motifs, and protein 3D structures of the same subtype were very similar. Evolutionary analysis showed that there are two pairs of tandem duplication genes and 14 clusters of segmental duplication genes in typical TaTRX family members; TaTRX15, TaTRX36, and TaTRX42 had positive selection compared with the orthologs of their ancestral species; rice and maize have 11 and 13 orthologous typical TRXs with wheat, respectively. Gene Ontology (GO) analysis indicated that typical TaTRXs were involved in maintaining redox homeostasis in wheat cells. Estimation of ROS content, determination of antioxidant enzyme activity, and gene expression analysis in a line overexpressing one typical TaTRX confirmed that TRX plays an important role in maintaining redox balance in wheat. A predictive analysis of cis-acting elements in the promoter region showed that typical TaTRXs were extensively involved in various hormone metabolism and response processes to stress. The results predicted using public databases or verified using RT-qPCR show that typical TaTRXs were able to respond to biotic and abiotic stresses, and their expression in wheat was spatiotemporal. A total of 16 wheat proteins belonging to four different families interacting with typical TaTRXs were predicted. The above comprehensive analysis of typical TaTRX genes can enrich our understanding of this gene family in wheat and provide valuable insights for further gene function research.

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Unravelling QTLs for Non-Destructive and Yield-Related Traits Under Timely, Late and Very Late Sown Conditions in Wheat (Triticum aestivum L.)

et al. 2022

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Performance and yield stability of doubled haploid population of wheat (Triticum aestivum L.) under high-temperature regime

Cited by 5 publications

References 42 publications

Genome-wide association study for seedling heat tolerance under two temperature conditions in bread wheat (Triticum aestivum L.)

Genome-wide association study for seedling heat tolerance under two temperature conditions in bread wheat (Triticum aestivum L.)

Genome-wide identification, characterization, evolution, and expression pattern analyses of the typical thioredoxin gene family in wheat (Triticum aestivum L.)

Unravelling QTLs for Non-Destructive and Yield-Related Traits Under Timely, Late and Very Late Sown Conditions in Wheat (Triticum aestivum L.)

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