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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
Article

Abstract

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.

Keywords

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

Notes

Acknowledgments

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

References

  1. Bandyopadhyay R (2000) Rust. Compendium of sorghum diseases (2nd edn). APS Press: St Paul, pp 23-24Google Scholar
  2. Bergquist RR (1974) The determination of physiologic races of sorghum rust in Hawaii. Proc Amer Phytopathol Soc 1:67Google Scholar
  3. Butler EJ (1918) Fungi and disease in plants. Thacker, Spink & Co., CalcuttaGoogle Scholar
  4. Frederiksen RA, Rosenow DT (1971) Disease resistance in sorghum. Proceedings of the 26th annual corn and sorghum research conference. American Seed Trade Association, Chicago, pp 71-82Google Scholar
  5. Frederiksen RA, Rosenow DT (1972) Sorghum rust, a naturally stabilised disease in North America. Phytopathol 62:757Google Scholar
  6. Kong GA, Goulter KC, Kochman JK, Thompson SM (1999) Evolution of pathotypes of Puccinia helianthi on sunflower in Australia. Australas Plant Pathol 28:320–332CrossRefGoogle Scholar
  7. McIntosh RA, Wellings CR, Park RF (1995) Wheat rusts. CSIRO, MelbourneCrossRefGoogle Scholar
  8. McVey DV, Long DL, Roberts JJ (2002) Races of Puccinia graminis in the United States during 1997 and 1998. Plant Dis 86:568–572CrossRefGoogle Scholar
  9. Tarr SAJ (1962) Diseases of sorghum sudan grass and broom corn. Commonwealth Agricultural Bureaux, OxfordGoogle Scholar
  10. White JW (2008) Pathotypes, epidemiology and economic importance of sorghum rust (Puccinia purpurea) in Australia, PhD thesis. School of Land, Crop and Food Sciences, The University of QueenslandGoogle Scholar
  11. White JW, Ryley MJ, George DL, Kong GA (2014) Optimal environmental conditions for infection and development of Puccinia purpurea on sorghum. Australas Plant Pathol 43:447–457CrossRefGoogle Scholar
  12. White JW, Ryley MJ, George DL, Kong GA, White SC (2012) Yield losses in grain sorghum due to rust infection. Australas Plant Pathol 41:85–91CrossRefGoogle Scholar
  13. Yahyaoui AH, Hakim MS, El Naimi M, Rbeiz N (2002) Evolution of physiologic races and virulence of Puccinia striiformis on wheat in Syria and Lebanon. Plant Dis 86:499–504CrossRefGoogle Scholar

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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