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Related Experiment Video

Updated: Jul 16, 2026

An Easy and Flexible Inoculation Method for Accurately Assessing Powdery Mildew-Infection Phenotypes of Arabidopsis and Other Plants
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An Easy and Flexible Inoculation Method for Accurately Assessing Powdery Mildew-Infection Phenotypes of Arabidopsis and Other Plants

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Selection of Spring Barley Varieties for Exploiting Quantitative Resistance for Powdery Mildew Control.

Antonín Dreiseitl1, Marta Zavřelová2

  • 1Department of Integrated Plant Protection, Agrotest Fyto Ltd., CZ-767 01 Kroměříž, Czech Republic.

Plants (Basel, Switzerland)
|July 15, 2026
PubMed
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Endophyte Inoculation and Elevated Potassium Supply on Productivity, Growth and Physiological Parameters of Spring Barley (<i>Hordeum vulgare</i> L.) Genotypes over Contrasting Seasons.

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Mlo-Mediated Broad-Spectrum and Durable Resistance against Powdery Mildews and Its Current and Future Applications.

Plants (Basel, Switzerland)·2024

Researchers screened 2804 barley accessions to find varieties lacking major resistance genes. This work identifies 447 suitable accessions for discovering and utilizing minor genes for powdery mildew resistance.

Area of Science:

  • Plant Pathology
  • Agronomy
  • Genetics

Background:

  • Powdery mildew (caused by *Blumeria hordei*) is a significant disease affecting barley (*Hordeum vulgare* L.) production.
  • Developing resistant barley varieties is crucial for crop protection, with quantitative minor genes offering durable resistance.
  • Major resistance genes, when broken, can interfere with identifying quantitative resistance, especially in small-plot field trials.

Purpose of the Study:

  • To identify barley genebank accessions lacking major resistance genes.
  • To provide a foundation for discovering and exploiting quantitative minor genes for powdery mildew resistance in barley.

Main Methods:

  • Screening of 2804 spring barley accessions from 70 countries against nine *Blumeria hordei* isolates with broad avirulence spectra.
Keywords:
Blumeria hordeiHordeum vulgaredetection of major resistance genesgenebankmislabeled accessionspowdery mildewquantitative resistancespring barley

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  • Identification of accessions lacking known major resistance genes (*Mla8*, *MlCh*) or those whose resistance is not affected by field pathotypes.

    • Main Results:

    • 143 accessions were identified as lacking any major resistance gene.
    • 304 accessions carried *Mla8* or *MlCh* genes, which are ineffective in the field due to the absence of corresponding avirulent pathotypes.
    • A total of 447 accessions were identified as suitable for further research into minor gene-based resistance.

    Conclusions:

    • The identified 447 accessions are valuable resources for future research aimed at discovering and utilizing quantitative minor genes for durable powdery mildew resistance in barley.
    • This study facilitates the targeted exploration of genetic resources for breeding improved, disease-resistant barley varieties.