Abstract
In the years 2016 to 2019 the virulence of the wheat leaf rust population in Slovakia was tested on Thatcher near-isogenic lines Lr1, Lr2a, Lr2b, Lr2c, Lr3a, Lr9, Lr10, Lr11, Lr13, Lr15, Lr17a, Lr19, Lr21, Lr23, Lr24, Lr26 and Lr28. A total of 111 rust isolates were analysed. Resistance genes Lr19 and Lr9 were effective to most of the tested isolates. Average virulence frequency to these resistance genes was only 1%. The gene Lr24 conditioned resistance to 92% of the tested rust isolates, gene Lr28 to 86% of the tested rust isolates. Low virulence frequency was also recorded to Lr2a (13%), Lr2b and Lr2c (both 12%). Average virulence to other tested Lr genes exceeded 82%. Thirty-eight winter wheat cultivars registered in the Slovak Republic were tested for the presence of Lr10, Lr19, Lr24, Lr26, Lr28, Lr34 and Lr37 by molecular markers. The gene Lr34 was the most frequent one in the tested cultivars, followed by Lr37 (both genes for adult plant resistance). The most widespread pathotypes in separate years and leaf rust severity in thirty-eight cultivars are also recorded.
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The datasets used and/or analysed during the current study are available from the corresponding author on reasonable request. Seeds are not publicly available until released as commercial genotypes.
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Acknowledgements
Authors thank Ing. Pavel Bartoš, DrSc. for cooperation in preparation of the manuscript.
Funding
This research was funded by the Ministry of Agriculture of the Czech Republic, Project No MZE RO0419 and Project NAZV QK1910041. This article has received funding from the European Union's Horizon 2020 research and innovation programme under Grant agreement No 773311.
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All authors contributed to the study conception and design. Material preparation, data collection and analysis were performed by Alena Hanzalová, Svetlana Šliková, Martina Hudcovicová, Lenka Klčová, Edita Gregová. The first draft of the manuscript was written by Alena Hanzalová, and all authors commented on previous versions of the manuscript. All authors read and approved the final manuscript.
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Hanzalová, A., Šliková, S., Hudcovicová, M. et al. Virulence of wheat leaf rust (Puccinia triticina Eriks.) and Lr resistance genes in wheat cultivars in the Slovak Republic in the years 2016–2019. CEREAL RESEARCH COMMUNICATIONS 50, 281–286 (2022). https://doi.org/10.1007/s42976-021-00169-7
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DOI: https://doi.org/10.1007/s42976-021-00169-7