Australian Cereal Rust Report: Volume 12, Issue 1: Cereal rust situation at late autumn 2014
Sydney, New South Wales, Australia
May 27, 2014
Poor seed purity, and not a pathogen mutation, was the likely cause of observed wheat stripe rust infections of Spitfire crops in 2013
Higher than expected wheat stripe rust infections of adult Spitfire crops were reported across the Northern region in 2013. Several samples were received for pathotype analysis at the Plant Breeding Institute. Three different glasshouse trials have since been conducted to test whether the pathogen has mutated for virulence to any gene conferring adult plant resistance in the variety Spitfire. No virulence was detected.
Spitfire in AUSVAR nurseries across the Northern region in 2013 performed as expected and maintained its moderately resistant (MR) rating for wheat stripe rust. The level of infection observed on adult Spitfire in grower’s fields was most likely due to poor seed purity.
Rusts can develop virulence to adult plant resistance genes in cereals. Whenever the field response of a variety is suspicious, samples should be submitted to the Australian Cereal Rust Survey for pathotype analysis.
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More news from: University of Sydney
Website: http://sydney.edu.au/agriculture/plant_breeding_institute/index.shtml Published: May 27, 2014 |
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