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    Necrotrophic Pathogens of Wheat

    Access Status
    Fulltext not available
    Authors
    Oliver, Richard
    Tan, Kar-Chun
    Moffat, Caroline
    Date
    2016
    Type
    Book Chapter
    
    Metadata
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    Citation
    Oliver, R. and Tan, K. and Moffat, C. 2016. Agronomy of grain growing: Necrotrophic Pathogens of Wheat, in Wrigley, C. and Corke, H. and Seetharaman, K. and Faubion, J. (ed), Encyclopedia of Food Grains, Volume 4, pp. 273-278. Amsterdam: Academic Press.
    Source Title
    Encyclopedia of Food Grains
    DOI
    10.1016/B978-0-12-394437-5.00240-0
    ISBN
    978-0-12-803538-2
    School
    Centre for Crop Disease Management
    URI
    http://hdl.handle.net/20.500.11937/40600
    Collection
    • Curtin Research Publications
    Abstract

    Wheat diseases are caused by a wide range of organisms. Among the economically most significant are the necrotrophic pathogens from the order Pleosporales: Pyrenophora tritici-repentis and Parastagonospora nodorum. They cause the diseases tan spot and Septoria nodorum blotch, respectively. They are the top two diseases in Western Australia and probably underreported in other parts of the world. Recent molecular research has developed a novel understanding of these pathogens. They produce secreted effectors (mostly proteins) that induce necrotic symptoms on sensitive genotypes of wheat. Recognition in wheat is encoded by specific sensitivity loci. The amount of disease is a function of the number of effectors produced by the pathogen for which matching recognition alleles are expressed in the wheat cultivar. This understanding has opened up a new rationale for wheat disease breeding that relies on the removal of sensitivity alleles from wheat germplasm.

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