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Barley (Hordeum vulgare L.) is one of the most economically important crops around the world. Diseases caused by fungi and viruses significantly reduce yield. The most important fungal diseases are leaf rust caused by Puccinia hordei, and powdery mildew caused by Blumeria graminis f. sp. hordei. The most economical and ecologically friendly way to avoid losses caused by these diseases is growing resistant...