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Septoria nodorum blotch of wheat: disease management and resistance breeding in the face of shifting disease dynamics and a changing environment

Downie, Rowena; Lin, Min; Corsi, Beatrice; Ficke, Andrea; Lillemo, Morten; Oliver, Richard; Phan, Huyen; Tan, Kar-Chun; Cockram, James
Peer reviewed, Journal article
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URI
https://hdl.handle.net/11250/2731017
Date
2020-11-27
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  • Divisjon for bioteknologi og plantehelse [376]
  • Publikasjoner fra CRIStin - NIBIO [3620]
  • Vitenskapelige artikler [1042]
Original version
Downie, R. C., Lin, M., Corsi, B., Ficke, A., Lillemo, M., Oliver, R. P., Phan, H. T. T., Tan, K.-C., & Cockram, J. (2020). Septoria nodorum blotch of wheat: disease management and resistance breeding in the face of shifting disease dynamics and a changing environment. Phytopathology.   10.1094/PHYTO-07-20-0280-RVW
Abstract
The fungus Parastagonospora nodorum is a narrow host range necrotrophic fungal pathogen that causes Septoria nodorum blotch (SNB) of cereals, most notably wheat. Although commonly observed on wheat seedlings, P. nodorum infection has the greatest effect on the adult crop. It results in leaf blotch, which limits photosynthesis and thus crop growth and yield. It can also affect the wheat ear, resulting in glume blotch which directly affects grain quality. Reports of P. nodorum fungicide resistance, the increasing use of reduced tillage agronomic practices and high evolutionary potential of the pathogen, combined with changes in climate and agricultural environments, mean that genetic resistance to SNB remains a high priority in many regions of wheat cultivation. In this review, we summarise current information on P. nodorum population structure and its implication for improved SNB management. We then review recent advances in the genetics of host resistance to P. nodorum and the necrotrophic effectors it secretes during infection, integrating the genomic positions of these genetic loci using the recently released wheat reference genome assembly. Finally, we discuss the genetic and genomic tools now available for SNB resistance breeding and consider future opportunities and challenges in crop health management using the wheat-P. nodorum interaction as a model.
Publisher
APS Publications
Journal
Phytopathology

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