Abstract
Barley leaf rust caused by Puccinia hordei is an important disease of barley in Ethiopia. In the 2003 and 2004 cropping seasons, surveys of P. hordei were conducted on fields in the main rainy, residual moisture and short rainy season-barley production systems. A total of 381 isolates were analysed on 12 barley differential hosts carrying different Rph resistance genes (Rph1-Rph12). Based on infection phenotypes on leaf rust (Rph) resistance genes, seven pathotypes were identified, namely ETPh7611, ETPh7631, ETPh6611, ETPh7651, ETPh7671, ETPh7653 and ETPh7633, with frequencies of 63.0, 21.5, 6.8, 2.9, 2.6, 2.1 and 1.2%, respectively. ETPh7611 and ETPh7631 were the most common pathotypes found in all the surveyed areas of the three production systems. ETPh7653 was found in the small rainy season production system only. ETPh7671, ETPh7653 and ETPh7633 were the most virulent, but the least frequent, pathotypes. All isolates were virulent on resistance genes Rph1, Rph4, Rph8, Rph9, Rph11 and Rph12. Virulence against Rph3 and Rph7 was absent. Genes Rph2, Rph6+2, Rph5 and Rph10 were effective against 96.3, 88.9, 65 and 2.4% of the rust isolates tested, respectively.
| Original language | English |
|---|---|
| Pages (from-to) | 351-357 |
| Number of pages | 7 |
| Journal | Plant Pathology |
| Volume | 55 |
| Issue number | 3 |
| DOIs | |
| Publication status | Published - 2006 |
Keywords
- barley brown rust
- barley leaf rust
- Hordeum vulgare
- pathotype
- race-specific resistance
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