Screening oat landraces for resistance to Blumeria graminis f. sp. avenae
- PDF / 373,726 Bytes
- 6 Pages / 595.276 x 790.866 pts Page_size
- 104 Downloads / 146 Views
SHORT COMMUNICATION
Screening oat landraces for resistance to Blumeria graminis f. sp. avenae Sylwia Okoń 1
&
Krzysztof Kowalczyk 1
Received: 1 October 2019 / Accepted: 25 January 2020 # The Author(s) 2020
Abstract Landraces have considerable potential for use in increasing genetic diversity of cultivated crops. They present a unique source of specific traits for disease and pest resistance, nutritional quality and marginal environment tolerance. In this study we screened of 156 A. sativa and A. strigosa landraces originated from Poland, for resistance to powdery mildew disease, caused by Blumeria graminis f. sp. avenae. In general, the tested genotypes showed lower level of resistance than expected. Among A. sativa landraces five were resistant to single isolates, the rest of them showed intermediate or susceptible response to B. graminis f. sp. avenae isolates used in host-pathogen tests. One A. strigosa genotype was resistant to all tested isolates and could be valuable source of resistance against oat powdery mildew. Keywords Oat . Powdery mildew . Landraces . Resistance
Diseases caused by fungal pathogen are one of the main factors reducing yield and grain quality in crops production. Among them the most important are rust diseases (leaf rust, brown rust, crown rust), powdery mildew, diseases caused by members of the genus Fusarium (Bentley et al. 2006; Kuzdraliński et al. 2017, 2018; Figueroa et al. 2018). One of the most important foliar diseases of oat is powdery mildew caused by Blumeria graminis DC. f. sp. avenae Em. Marchal. This disease appears every year and has been reported as a serious problem in many parts of the world (Roderick et al. 2000; Sebesta et al. 1991, Banyal et al. 2016, Xue et al. 2017). Limiting the losses caused by the occurrence of this pathogen is based on appropriate agrotechniques and introduction of resistant cultivars (Gacek 2000; Tratwal and Rosiak 2010). To date, ten genes conferring resistance to oat powdery mildew have been characterised, but based on reports from available literature only a few are high effective against existing Blumeria graminis DC. f. sp. avenae populations. (Okoń 2015; Okoń and Ociepa 2017). Resistance to powdery mildew is decreasing due to the emergence of new pathogen pathotypes by mutations and recombinations. Also using the
* Krzysztof Kowalczyk [email protected] 1
Institute of Plant Genetics, Breeding and Biotechnology, University of Life Sciences, Lublin, Poland
same set of resistance genes in breeding programmes could result in the selection of pathotypes with the matching virulence genes, resulting in resistance breakdown (Czembor and Czembor 2001). Menardo et al. (2016) suggested that also hybridization between formae speciales is a mechanizm of adaptation to new crops introduced by agriculture. Because of these facts there is a need to search for novel and effective sources of resistance to powdery mildew in oat. A valuable source of genetic variation, and thus the source of resistance genes can be both wild species and landra
Data Loading...
