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Rare Virulences and Great Pathotype Diversity of a Central European Blumeria hordei Population

Barley is an important crop grown on almost 49 Mha worldwide in 2021 and is particularly significant in Europe where powdery mildew is the most frequent disease on susceptible varieties. The most suitable way to protect crops is by exploiting genetic resistance. However, the causal agent Blumeria ho...

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Autor principal: Dreiseitl, Antonín
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10672294/
https://www.ncbi.nlm.nih.gov/pubmed/37998851
http://dx.doi.org/10.3390/jof9111045
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author Dreiseitl, Antonín
author_facet Dreiseitl, Antonín
author_sort Dreiseitl, Antonín
collection PubMed
description Barley is an important crop grown on almost 49 Mha worldwide in 2021 and is particularly significant in Europe where powdery mildew is the most frequent disease on susceptible varieties. The most suitable way to protect crops is by exploiting genetic resistance. However, the causal agent Blumeria hordei is an extremely adaptable pathogen. The aims of this research were to increase our knowledge of the rapidly changing pathogen population and detect rare virulences. Random samples of the pathogen were obtained from the air by means of a mobile spore sampler. Spores were collected by driving across the Czech Republic in 2019, 2021 and 2023, and 299 isolates were analyzed on 121 host varieties. No infection occurred on 35 differentials, rare virulence was recorded on 31 varieties and a higher virulence frequency was found on 55 differentials. A core set of differentials along with four additional varieties distinguishes 295 pathotypes (Simple Index = 0.987) and the virulence complexity of isolates varied from 4 to 19 with an average of 10.39. The detection of new virulences, the increasing frequency of previously rare virulences and high pathotype diversity as well as high virulence complexity confirm that using nonspecific durable resistance is crucial for successfully breeding commercial varieties.
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spelling pubmed-106722942023-10-25 Rare Virulences and Great Pathotype Diversity of a Central European Blumeria hordei Population Dreiseitl, Antonín J Fungi (Basel) Article Barley is an important crop grown on almost 49 Mha worldwide in 2021 and is particularly significant in Europe where powdery mildew is the most frequent disease on susceptible varieties. The most suitable way to protect crops is by exploiting genetic resistance. However, the causal agent Blumeria hordei is an extremely adaptable pathogen. The aims of this research were to increase our knowledge of the rapidly changing pathogen population and detect rare virulences. Random samples of the pathogen were obtained from the air by means of a mobile spore sampler. Spores were collected by driving across the Czech Republic in 2019, 2021 and 2023, and 299 isolates were analyzed on 121 host varieties. No infection occurred on 35 differentials, rare virulence was recorded on 31 varieties and a higher virulence frequency was found on 55 differentials. A core set of differentials along with four additional varieties distinguishes 295 pathotypes (Simple Index = 0.987) and the virulence complexity of isolates varied from 4 to 19 with an average of 10.39. The detection of new virulences, the increasing frequency of previously rare virulences and high pathotype diversity as well as high virulence complexity confirm that using nonspecific durable resistance is crucial for successfully breeding commercial varieties. MDPI 2023-10-25 /pmc/articles/PMC10672294/ /pubmed/37998851 http://dx.doi.org/10.3390/jof9111045 Text en © 2023 by the author. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Dreiseitl, Antonín
Rare Virulences and Great Pathotype Diversity of a Central European Blumeria hordei Population
title Rare Virulences and Great Pathotype Diversity of a Central European Blumeria hordei Population
title_full Rare Virulences and Great Pathotype Diversity of a Central European Blumeria hordei Population
title_fullStr Rare Virulences and Great Pathotype Diversity of a Central European Blumeria hordei Population
title_full_unstemmed Rare Virulences and Great Pathotype Diversity of a Central European Blumeria hordei Population
title_short Rare Virulences and Great Pathotype Diversity of a Central European Blumeria hordei Population
title_sort rare virulences and great pathotype diversity of a central european blumeria hordei population
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10672294/
https://www.ncbi.nlm.nih.gov/pubmed/37998851
http://dx.doi.org/10.3390/jof9111045
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