EFFECTIVENESS OF PA GENES ON PARTIAL RESISTANCE TO BARLEY LEAF RUST AT ADULT STAGE | ||||
| Egyptian Journal of Agricultural Research | ||||
| Article 3, Volume 75, Issue 4, December 1997, Page 569-881 PDF (3.1 MB) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/ejar.1997.426061 | ||||
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| Abstract | ||||
| Screening two groups of barley genotypes for partial resistance in the adult stage against two virulent physiologic races of Puccinia hordei Otth, the causal organism of barley leaf rust was carried out under greenhouse conditions. The first group consisted of seventeen genotypes with known Pa genes, while the second group consisted of fifteen cultivars with unknown genes for resistance. Rust severity, area under disease progress Curve (AUDPC), latent period (LP), infection frequency (IF), infectious period (IP) and pustule size (PS) were estimated for all barley entries. Results indicated that cultivars Quinn (Pa2 Pa5), Gold (Pa4), Peruvian (Pa2 loucus) and Estate (Pa3) can be grouped as slow-rusting with longer (LP), less (IF), shorter (IP) and restricted (PS), in addition to the less ALJDPC. Cultivars which showed the same trend may carry these genes for partial resistance. These cultivars can be included in the breeding program. | ||||
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