Sydney, New South Wales, Australia
February 8, 2013

Cereal Rust Report, Season 2013, Volume 11 Issue 1

A new pathotype of oat crown rust with virulence for the resistance gene Pc91 was isolated from a sample collected in late 2012 from Queensland. This is the first detection of virulence for Pc91 in Australia since we began monitoring this resistance gene in the early 1990s. Cultivars Drover and Aladdin are known to carry Pc91: while the new pathotype is virulent on seedlings of cultivar Drover, it is not able to attack cv. Aladdin presumably due to additional resistance provided by gene Pc50. Growers of Drover oats should monitor crops regularly for the presence of crown rust as it is vulnerable to this new pathotype.

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Website: http://sydney.edu.au/agriculture/plant_breeding_institute/index.shtml

Published: February 8, 2013