Australasian Plant Pathology

, Volume 44, Issue 1, pp 1–4 | Cite as

Identification of pathotypes of the sorghum rust pathogen, Puccinia purpurea, in Australia

  • J. A. WhiteEmail author
  • M. J. Ryley
  • D. L. George
  • G. A. Kong


This study aimed to determine if pathotypic diversity of the sorghum rust pathogen, P. purpurea, exists in eastern Australia. A differential set of 10 Sorghum bicolor genotypes was used to identify four putative pathotypes from the 28 P. purpurea isolates that were tested. Pathotypes 1 and 3 were the most common, together comprising 85.7 % of the isolates tested, while pathotype 2 comprised 10.7 % of isolates, and pathotype 4 the remainder. Based on the limited number of isolates that were tested, there was evidence of geographic specialization amongst the pathotypes, with pathotype 1 not being found in north Queensland. This work has provided conclusive evidence that pathotypes of P. purpurea exist in the sorghum growing regions of Australia and has resulted in the development of a protocol for identifying pathotypes and screening breeding and experimental lines for resistance to these pathotypes. However, further investigations on the pathotypic diversity of P. purpurea and on the temporal and geographic distribution of these four as well as any additional undiscovered pathotypes are needed.


Differential set Geographic distribution Pathotype frequency S. bicolor S. sudanense S. halepense 



The authors would like to thank Grains Research and Development Corporation (GRDC) for provision of funding.


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Copyright information

© Australasian Plant Pathology Society Inc. 2014

Authors and Affiliations

  • J. A. White
    • 1
    Email author
  • M. J. Ryley
    • 1
  • D. L. George
    • 2
  • G. A. Kong
    • 3
  1. 1.Department of Agriculture, Forestry and FisheriesToowoombaAustralia
  2. 2.The University of Queensland, School of Agriculture and Crop SciencesGattonAustralia
  3. 3.Cooperative Research Centre for National Plant BiosecurityPerthAustralia

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