Sources of Resistance to Powdery Mildew in Wild Barley (Hordeum vulgare subsp. spontaneum) Collected in Jordan, Lebanon, and Libya

Barley powdery mildew (BPM) is caused by the pathogen Blumeria hordei (Bh) and can lead to severe yield loss. Plant pathologists are looking for new sources of resistance BPM. accessions, including wild subspecies Hordeum vulgare subsp. spontaneum (Hvs), stored in many gene banks often a valuable source economically important characteristics. The barley Hvs could be aim presented investigation was detect BPM 81 accessions collected Jordan (46), Lebanon (24), Libya (11). European differential isolates were used, resistant single plant lines selected use from fifteen Libya. These tested presence specific genes using set Bh isolates. Hypotheses about made comparing reaction spectra with those lines. After an analysis obtained results, it concluded that all 31 had not represented Bh. Twenty-six originated showed reactions used. will further as effective used prebreeding programs.