Mapping of the oat crown rust resistance gene Pc91

• Published in: Theoretical and applied genetics 2011-02, Vol.122 (2), p.317-325
• Main Authors: McCartney, C. A., Stonehouse, R. G., Rossnagel, B. G., Eckstein, P. E., Scoles, G. J., Zatorski, T., Beattie, A. D., Chong, J.
• Format: Article
• Language: English
• Subjects: Agriculture; Avena - genetics; Avena - immunology; Avena - microbiology; Base Sequence; Basidiomycota - physiology; Biochemistry; Biological and medical sciences; Biomedical and Life Sciences; Biotechnology; Chromosome Mapping; Classical genetics, quantitative genetics, hybrids; Crop diseases; Crops, Agricultural - genetics; DNA; DNA, Plant - genetics; Fundamental and applied biological sciences. Psychology; Genes; Genetic Markers; Genetics of eukaryotes. Biological and molecular evolution; Genomes; Host-Pathogen Interactions; Immunity, Innate; Life Sciences; Molecular Sequence Data; North America; Original Paper; Plant Biochemistry; Plant Breeding/Biotechnology; Plant Diseases - microbiology; Plant Genetics and Genomics; Plant resistance; Polymorphism; Pteridophyta, spermatophyta; Puccinia coronata; Sequence Alignment; Vegetals; Virulence
• ISSN: 0040-5752; 1432-2242
• DOI: 10.1007/s00122-010-1448-9

Crown rust is an important disease of oat caused by Puccinia coronata Corda f. sp. avenae Eriks. Crown rust is efficiently and effectively managed through the development of resistant oat varieties. Pc91 is a seedling crown rust resistance gene that is highly effective against the current P. coronata population in North America. The primary objective of this study was to develop DNA markers linked to Pc91 for purposes of marker-assisted selection in oat breeding programs. The Pc91 locus was mapped using a population of F7-derived recombinant inbred lines developed from the cross ‘CDC Sol-Fi’/‘HiFi’ made at the Crop Development Centre, University of Saskatchewan. The population was evaluated for reaction to P. coronata in field nurseries in 2008 and 2009. Pc91 mapped to a linkage group consisting of 44 Diversity Array Technology (DArT) markers. DArTs were successfully converted to sequence characterized amplified region (SCAR) markers. Five robust SCARs were developed from three non-redundant DArTs that co-segregated with Pc91 . SCAR markers were developed for different assay systems, such that SCARs are available for agarose gel electrophoresis, capillary electrophoresis, and Taqman single nucleotide polymorphism detection. The SCAR markers accurately postulated the Pc91 status of 23 North American oat breeding lines.