Genome-wide association reveals a complex architecture for rust resistance in 2300 worldwide bread wheat accessions screened under various Australian conditions.
Reem Joukhadar, Grant Hollaway, Fan Shi, Surya Kant, Kerrie Forrest, Debbie Wong, Joanna Petkowski, Raj Pasam, Josquin Tibbits, Harbans Bariana, Urmil Bansal, German Spangenberg, Hans Daetwyler, Tony Gendall, Matthew Hayden
Theoretical and Applied Genetics | Published : 2020
We utilized 2300 wheat accessions including worldwide landraces, cultivars and primary synthetic-derived germplasm with three Australian cultivars: Annuello, Yitpi and Correll, to investigate field-based resistance to leaf (Lr) rust, stem (Sr) rust and stripe (Yr) rust diseases across a range of Australian wheat agri-production zones. Generally, the resistance in the modern Australian cultivars, synthetic derivatives, South and North American materials outperformed other geographical subpopulations. Different environments for each trait showed significant correlations, with average r values of 0.53, 0.23 and 0.66 for Lr, Sr and Yr, respectively. Single-trait genome-wide association studies (..View full abstract