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Advances in understanding the epidemiology, molecular biology and control of net blotch and the net blotch barley interaction

Code: 9781801463027
Anke Martin, Barsha Poudel and Buddhika Amarasinghe Dahanayaka, Centre for Crop Health, University of Southern Queensland, Australia; Mark S. McLean, Agriculture Victoria, Victorian Department of Economic Development, Jobs, Tourism and Resources, Australia; Lisle Snyman, Queensland Department of Agriculture and Fisheries, Australia; and Francisco J. Lopez-Ruiz, Centre for Crop and Disease Management, Curtin University, Australia

Chapter synopsis: Net blotches are the most widely distributed foliar diseases of barley worldwide, causing significant losses in grain yield. They occur as net form net blotch, caused by Pyrenophora teres f. teres and spot form net blotch caused by P. teres f. maculata. Both sexual and asexual reproduction play a role in the P. teres disease cycles leading to changes in genetic variation of populations. Breeding programs have to keep pace with pathogenic changes and ensure different sources of resistance are present in current barley cultivars. Knowledge of the genetic architecture and genes involved in virulence is thus vital to increase the durability of net blotch resistance in barley cultivars. This chapter explores the molecular biology, life-cycle and epidemiology of the net blotch fungi and discusses the key challenges we are facing in managing the net blotches using both fungicide resistance and breeding strategies to achieve durable disease resistance in barley.

DOI: 10.19103/AS.2021.0092.31
Table of contents 1 Introduction 2 Hybrids 3 Molecular markers to accurately diagnose P. teres isolates 4 Genetic variation and population genetics of P. teres 5 Pathogenic variation and changes in virulence 6 Differential sets 7 The P. teres genome 8 Identification of genes associated with virulence/avirulence by QTL and association mapping 9 Managing the net blotches 10 Conclusion and future trends 11 Where to look for further information 12 Acknowledgements 13 References

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