Screening Wild Oat Accessions from Morocco for Resistance to Puccinia coronata

Abstract

Tan, M. Y. A., and Carson, M. L. 2013. Screening wild oat accessions from Morocco for resistance to Puccinia coronata. Plant Dis. 97; 1544-1548.

Resistance to Puccinia coronata f. sp. avenae in Avena magna, A. murphyi, and A. insularis

“…Searching for new sources of crown rust resistance genes in the tetraploids is a key objective in plant protection. Previous studies that focused on the screening of wild oat accessions were limited in terms of sources of the tested materials as well as the species analyzed (Cabral and Park 2014;Carson 2009aCarson , 2010Tan and Carson 2013). The current work complements existing data and reveals the spectrum of potential new resistance genes or alleles present in the wild tetraploids and previously misidentified Avena hexaploid accessions gathered from a number of gene banks.…”

“…However, virulence to this gene has already been recorded in the United States (Carson 2009b), Canada (Chong et al 2008;McCartney et al 2011;Menzies et al 2015), and Australia (Park 2013). Tan and Carson (2013), in a study involving 38 A. murphyi and 40 A. magna accessions from NSGC, identified 29 (76.3%) and 19 (47.5%) resistant genotypes, respectively. The present study examined only six of the genotypes analyzed by Tan and Carson (2013) but the results obtained confirmed some of the previous findings.…”

“…Tan and Carson (2013), in a study involving 38 A. murphyi and 40 A. magna accessions from NSGC, identified 29 (76.3%) and 19 (47.5%) resistant genotypes, respectively. The present study examined only six of the genotypes analyzed by Tan and Carson (2013) but the results obtained confirmed some of the previous findings. For example, A. murphyi PI 657600 demonstrated a wide spectrum of resistance.…”

“…Thus far, the screening of wild accessions has confirmed crown rust resistance in the seedling and adult plant stages of A. barbata (Cabral and Park 2014;Cabral et al 2011;Carson 2009aCarson , 2010. Moreover, recent studies identified resistant genotypes in other diploid species (A. atlantica Baum et Fedak, A. damascene Rajhathy et Baum, A. hirtula Lag., A. longiglumis Dur., and A. wiestii Steud), as well as the tetraploid A. agadiriana Baum et Fedak (Tan and Carson 2013). Such discoveries may hold a promise for breeding programs in the future but introgression of resistance from these sources is difficult, because the aforementioned Avena spp.…”

Puccinia coronata f. sp. avenae: a threat to global oat production

“…Several other wild oat species have been screened and used to identify new resistance genes (Aung et al ., ; Cabral and Park, ; Cabral et al ., ; Mitchell Fetch et al ., ; Rooney et al ., ). Recent sources of both race‐specific and APR include A. strigosa , A. glabrota , A. trichophylla , A. longiglumus , A. magna and A. murphyi (Cabral and Park, ; Sowa et al ., ; USDA‐ARS CDL, ); some of these sources originated from Moroccan and Israeli collections (Dinoor, ; Tan and Carson, ; Wahl, ). Carson () screened accessions of A. barbata from the Mediterranean region and found some additional sources of resistance for both seedling and adult stages, including a new type of ‘blotchy’ reaction in adult plants.…”