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Pathogenic variation within the 2009 Australian Ascochyta rabiei population and implications for future disease management strategy

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Abstract

Twenty four Ascochyta rabiei isolates, collected from the 2009 eastern Australian chickpea growing regions, were assessed for their ability to infect 12 previously characterised chickpea genotypes. Comparison of means analysis and principal components analysis of area under the disease progress curve measures resulted in continua rather than discrete isolate groupings, suggesting that a broad diversity of pathogenicity exists in the current A. rabiei population. Breeders can now choose isolates that represent the variation found in the field to screen their germplasm, providing greater knowledge on the likely longevity of cultivars before they are commercially released.

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Acknowledgements

The authors acknowledge the Australian chickpea breeders and pathologists for their advice on host genotypes, Kevin Moore for supplying the Tamworth isolates, and Kristy Hobson and Jenny Davidson for assistance with the collection of isolates in Victoria and South Australia.

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Authors and Affiliations

  1. Melbourne School of Land and Environment, The University of Melbourne, Private Bag 260, Horsham, Vic, 3401, Australia

    Vicki L. Elliott

  2. Melbourne School of Land and Environment, The University of Melbourne, Parkville, Vic, 3401, Australia

    Paul W. J. Taylor & Rebecca Ford

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  1. Vicki L. Elliott
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  2. Paul W. J. Taylor
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Correspondence to Vicki L. Elliott.

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Elliott, V.L., Taylor, P.W.J. & Ford, R. Pathogenic variation within the 2009 Australian Ascochyta rabiei population and implications for future disease management strategy. Australasian Plant Pathol. 40, 568–574 (2011). https://doi.org/10.1007/s13313-011-0087-1

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