Open research questions in Wheat and Barley Genetics and Pathology

What the literature leaves open

• Identified markers linked to GLS resistance and nutritional traits should be validated across diverse genetic backgrounds and environments before routine application in marker-assisted selection.

  Marker-Assisted Selection for Gray Leaf Spot Resistance in Extra-Early Provitamin A Quality Protein Maize Inbred Lines · 2026 · DOI

• Investigating the distinct parts of the oat panicle in relation to endogenous hormones remains a research gap for understanding the physiological mechanisms underlying yield formation.

  The role of endogenous hormones in regulating grain number in oat panicles under drought stress across cultivars · 2026 · DOI

• The study highlights the need for a comprehensive analysis of Bgt populations over time to inform resistance management strategies.

  Deciphering a pathogen’s evolution: a two-decade longitudinal study reveals virulence shifts and identifies durable Pm genes against Himalayan Blumeria graminis f. sp. tritici populations · 2026 · DOI

• The lack of drought-tolerant wheat cultivars threatens global food security. There is a need to evaluate drought tolerance in diverse hexaploid wheat accessions. The genetic diversity and drought adaptive potential of hexaploid wheat accessions are not well understood.

  Assessing Genetic Diversity and Drought Adaptive Potential in Diverse Hexaploid Wheat Accessions · 2026 · DOI

• Heat stress is a major constraint to global crop productivity, particularly in wheat. Stomata play a central role in balancing photosynthetic carbon assimilation and evaporative cooling, but the mechanisms underlying this process are not well understood. Breeding programs aimed at improving wheat heat tolerance are limited by a lack of understanding of the genetic architecture underlying stomatal traits.

  QTLs for heat-induced stomatal anatomy underpin gas exchange variation in field-grown wheat · 2026 · DOI

• Future research should aim to validate the study's findings in other wheat varieties and environments. Future research should examine the potential for breeding programs to improve wheat heat tolerance by selecting for stomatal traits. Future research should investigate the molecular mechanisms underlying the relationship between stomatal traits and heat tolerance in wheat.

  QTLs for heat-induced stomatal anatomy underpin gas exchange variation in field-grown wheat · 2026 · DOI

• The study aims to address this gap by evaluating the resistance levels of wheat lines to leaf and stripe rust under natural conditions.

  Mapping resistance to leaf and stripe rusts in bread Triticum aestivum L. germplasm through GWAS and field phenotyping · 2026 · DOI

• The lack of understanding of how regional grain-filling environments affect wheat traits. The need to evaluate regional variation in wheat traits within the same genetic background.

  Evaluation of Wheat’s (Triticum aestivum L.) Agronomic and Grain Traits and Protein and Starch Characteristics Under Cultivation Environments in Korea · 2026 · DOI

• Further study is needed to investigate the effects of the translocation in multiple genetic backgrounds. The potential pleiotropic effects of the translocation on other traits should be investigated. The study of other genetic variations that affect culm length could provide new insights into the genetic regulation of this trait.

  A translocation-mediated duplication of the distal region of chromosome 5A reduced the culm length in a gamma-irradiated wheat mutant · 2026 · DOI

• There is a need for novel genetic variations that can be used to fine-tune culm length in wheat. Current semi-dwarf genes have pleiotropic effects and are not ideal for use in breeding programs.

  A translocation-mediated duplication of the distal region of chromosome 5A reduced the culm length in a gamma-irradiated wheat mutant · 2026 · DOI

• The need to identify the constraints on protein content and propose strategies to improve it.

  OYUP Practice Abstract - Raising organic winter wheat protein content for bread production · 2026 · DOI

• Popcorn is deficient in essential lysine due to the high abundance of lysine-devoid zein storage proteins. There is a need to breed high-lysine, diversely colored popcorn inbreds with improved protein quality.

  Breeding for colored quality protein popcorn with improved amino acid composition · 2026 · DOI

• The need to enhance wheat production and food security. The lack of knowledge on the genetic divergence and combining ability of wheat lines and testers.

  General and specific combining ability analysis in lines, testers, and hybrids (F1/F2) of Triticum aestivum L. · 2026 · DOI

• The molecular mechanisms underlying grain size formation in barley are not well understood. There is a need to identify candidate genes controlling grain size in barley.

  Identification of genes controlling grain size in barley through RNA-seq and weighted gene co-expression network analysis · 2026 · DOI

• The development of wheat-barley introgression lines is a relatively new area of research. There is a need for further studies on the potential applications of these lines.

  Peer instruction in large-group undergraduate anaesthesiology teaching: a cross-sectional study of educator and student perspectives · 2026 · DOI

• The paper identifies a need for further research on the use of molecular cytogenetic techniques to analyze meiotic pairing behavior.

  Molecular engineering of organic room temperature phosphorescence emitters for next generation applications · 2026 · DOI

• Prior work has focused on genotype × environment or genotype × management interactions, but the study clarifies explicitly the impact of varying input intensities on both yield and quality indicators.

  Performance of Spring Wheat Genotypes for Quality, Yield, and Related Reproductive Traits under Different Production Systems · 2026 · DOI

• Although the paper confirms significant G×PS interactions for protein and gluten content (P < 0.001), it does not investigate the temporal dynamics of protein and gluten accumulation during grain fill, or whether these differences result from altered translocation patterns, differential remobilization from vegetative tissues, or enhanced de novo synthesis under high-intensive conditions.

  Performance of Spring Wheat Genotypes for Quality, Yield, and Related Reproductive Traits under Different Production Systems · 2026 · DOI

• Linkage drag and recombination suppression hinder the utilization of wild wheat relatives - Limited phenotyping capacity and field validation restrict the translation of discoveries into breeding pipelines - CRISPR/Cas genome editing is complicated by the hexaploid genome and low transformation…

  From conservation to utilization of wild wheat relatives and allied taxa for climate-resilient wheat improvement in dryland agroecosystems · 2026 · DOI

• The gap between the potential of wild wheat relatives and their actual utilization in breeding programs - The lack of integration between biological constraints and conservation and policy…

  From conservation to utilization of wild wheat relatives and allied taxa for climate-resilient wheat improvement in dryland agroecosystems · 2026 · DOI

• The study identifies a gap in understanding the effects of genotype, location, and growing season on grain yield and quality traits in winter wheat genotypes.

  Evaluation of DUS and VCU Traits in Winter Wheat (Triticum aestivum L.) Genotypes Across Multiple Locations and Seasons · 2026 · DOI

• The complex polygenic nature of the grain number trait - The need for large sample sizes for effective QTL identification - Population structure interference in QTL…

  An Effective YOLOv11 Grain Detection Model Trained on Intact Barley Spikes Reveals a QTL Containing a Pivotal Regulator of Lateral Spikelet Formation · 2026 · DOI

• Limited water availability due to increasingly frequent reductions in seasonal rainfall, - population structure interference, - selective pressures present during the microspore phase of anther culture…

  An Effective YOLOv11 Grain Detection Model Trained on Intact Barley Spikes Reveals a QTL Containing a Pivotal Regulator of Lateral Spikelet Formation · 2026 · DOI

• The study did not identify the paternal form of the spontaneous hybrids, - The study only analyzed four spontaneous hybrids, - The study used a limited number of replicates for the extraction…

  The Research of New Natural Spontaneous Fertile Attention: Title Altered Hybrids (Aegilops trivialis Migusch. Et Chak) Using Laser Microscopy and Tandem Mass Spectrometry · 2026 · DOI

• Further analysis of the genetic instability of wheat-barley hybrids. The use of wheat-barley introgression lines for mapping genes and markers. The application of wheat-barley hybridization in crop improvement.

  Linking trust in human drivers and autonomous vehicles: evidence from a U.S. survey of vulnerable road users · 2026 · DOI

Most-cited papers in Wheat and Barley Genetics and Pathology

• Shifting the limits in wheat research and breeding using a fully annotated reference genome · Science · 2018 · 2,264 citations
• Optical maps refine the bread wheat Triticum aestivum cv. Chinese Spring genome assembly · The Plant Journal · 2021 · 578 citations
• Genome-edited powdery mildew resistance in wheat without growth penalties · Nature · 2022 · 467 citations
• WheatOmics: A platform combining multiple omics data to accelerate functional genomics studies in wheat · Molecular Plant · 2021 · 454 citations
• Chromosome-scale genome assembly provides insights into rye biology, evolution and agronomic potential · Nature Genetics · 2021 · 251 citations
• Population genomic analysis of Aegilops tauschii identifies targets for bread wheat improvement · Nature Biotechnology · 2021 · 231 citations
• Heat stress effects on the reproductive physiology and yield of wheat · Journal of Agronomy and Crop Science · 2021 · 227 citations
• Reducing brassinosteroid signalling enhances grain yield in semi-dwarf wheat · Nature · 2023 · 199 citations
• Long-read genome sequencing of bread wheat facilitates disease resistance gene cloning · Nature Genetics · 2022 · 189 citations
• Plant disease severity estimated visually: a century of research, best practices, and opportunities for improving methods and practices to maximize accuracy · Tropical Plant Pathology · 2021 · 186 citations

Most recent work

• Genetic identification and characterization of a novel locus for wheat kernel length · Journal of Integrative Agriculture · 2026
• Virulence on Pm4 kinase-based resistance is determined by two divergent wheat powdery mildew effectors · Nature Plants · 2026
• Cereal protein biofortification at the interface of nutrition, yield and sustainability · Nature Plants · 2026
• Genetic and phenotypic associations between peduncle characteristics and spike productivity in wheat under drought and normal conditions · Theoretical and Applied Genetics · 2026
• Genome wide comparative analysis of microsatellites in Bipolaris sorokiniana for diversity analysis and spot blotch disease diagnosis in wheat · World Journal of Microbiology and Biotechnology · 2026
• Genome-Wide Signatures of Antioxidant Regulation Reveal Mechanisms of Cold-Stress Memory and Yield Stability in Barley · Journal of Plant Growth Regulation · 2026
• VERNALIZATION2 alters early tiller development in a facultative spring hexaploid bread wheat · New Phytologist · 2026
• Improving wheat tolerance to post-flowering heat using matched development stages and field-based reaction norms · Journal of Experimental Botany · 2026
• A four-dimensional spatial transcriptome atlas of barley caryopsis development and germination · The Plant Cell · 2026
• The Complex Landscape of Multidrug Resistance in Zymoseptoria tritici: MFS1 Promoter Plasticity and beyond · bioRxiv · 2026

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