Plant Health AUSTRALIA National Myrtle Rust Transition to Management (T2M) Program Final Report Genetic basis of pathogenicity in Uredo rangelii Authors: Dr. Karanjeet S. Sandhu and Prof. Robert F. Park The University of Sydney Plant Breeding Institute Cobbitty NSW 2570 September 2013 PHA Project Number: P218 Name of Research Provider: The University of Sydney Project Title: Project 4.1: Genetic basis of pathogenicity in Uredo rangelii Principal Investigators: Dr. Karanjeet Sandhu and Prof. Robert Park Faculty of Agriculture and Environment, the University of Sydney, Plant Breeding Institute Private Bag 4011, Narellan NSW 2567, Australia Correspondence:
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[email protected], T +61 2 9351 8821, F +61 2 9351 8875 Disclaimer: This report has been created by the University of Sydney solely for the use by Plant Health Australia Limited, its authorised contractors and agents and specifically for the purposes of Plant Health Australia Limited. The University of Sydney does not warrant that the report, when used by persons other than Plant Health Australia Limited or its unauthorised contractors or agents, will be accurate, reliable, complete, up to date or fit for any purpose and disclaims all liability for any loss, damage, cost or expense incurred in or arising from such use to the extent permitted by law. Final Report PHA_P218_4.1 Page 1 Summary: Myrtle rust was first time detected in Australia on the central coast of NSW in April 2010, from Agonis flexuosa, Callistemon viminalis and Syncarpia glomulifera plants. Based on the tonsured urediniospores, initially this pathogen was described as Uredo rangelii but later on with the detection of teliospores and studying the sequence of the rDNA ITS region, it was considered to be a strain of Puccinia psidii sensu lato, a guava rust causing fungal pathogen that was first detected in Brazil in 1884.