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The fungal pathogens Fusarium pseudograminearum causing crown rot disease in wheat, pose a significant threat to global wheat production. The widespread adoption of minimum tillage and stubble retention practices has led to an increased disease incidence, despite its first identification over 60 years ago. This study aims to dissect the genetic basis of crown rot resistance in wheat using three objectives. The initial step consists of evaluating a panel of Watkins wheat landraces for crown rot resistance in both glasshouse and seedling experiments, followed by a Genome-Wide Association Study (GWAS) to detect genomic regions and molecular markers associated with the resistance. GWAS will be performed using Single Nucleotide Polymorphism (SNP) markers specific to the Watkins wheat landrace that was published recently. Next is to predict genomic regions associated with the crown rot resistance in W21MMT70 using SNP arrays and a double haploid population, generated from W21MMT70 and Mendos cross. Finally, to screen 300 mutant lines generated using ethyl methane sulfonate and wheat variety Lancer to identify and characterise acquired resistance or susceptibility to crown rot. By combining GWAS, biparental mapping, and mutant characterisation, this study aims to uncover genetic information about crown rot resistance and contribute to the development of robust, disease-resistant wheat varieties.

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