| Abstrakt: |
This research aimed to study the ecological context of Puccinia coronata f. sp. avenae (Pca), a pathogen affecting oats, in Jordan. The region is identified as a natural habitat for various wild oat species and the Rhamnaceae family, serving as an alternative host for Pca. The prolonged coexistence of the pathogen, wild oats (Avena spp.), and Rhamnus creates a scenario conducive to natural selection for long-term resistance. Although oats are not a major crop in Jordan, studying this disease is still significant. The survey spans were between 2018 and 2023, focusing on the upper and lower regions of Jordan Valley. The survey involved collecting, coding, preserving, and morphologically identifying Pca-infected leaves, wild oats, and Rhamnus specimens. Results indicated the majority of Pca isolates were from wild oats, particularly in the northern region. Wild oat samples mainly belonged to A. sterilis. Rhamnus spp. specimens, identified primarily as Rh. lycioides with subspecies graecae and lycioides and few Rh. punctatashowed no roleasan alternative host of Pca infection. The research provides a foundation for future investigations, emphasizing race characterization and evaluating wild oat accessions for potential resistant genes against Pca. [ABSTRACT FROM AUTHOR] |
