Abstract
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.
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Acknowledgments
The authors thank Tim Dament, Jill Woytowich, Jessica Taylor, Raelene Regier, Sheri Fisher, and the CDC oat breeding program for technical assistance. Thanks to Nick Tinker for providing seed of SM7, and Jennifer Mitchell-Fetch for providing seed of OT2041, OT2045, OT2048, OT2052, OT2054, OT2055, OT7051, and 99P26-BY1D. Funding for this research was provided by Quaker Tropicana Gatorade Canada, the Saskatchewan Agriculture Development Fund, and the Saskatchewan Oat Development Commission.
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Communicated by C. Feuillet.
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McCartney, C.A., Stonehouse, R.G., Rossnagel, B.G. et al. Mapping of the oat crown rust resistance gene Pc91 . Theor Appl Genet 122, 317–325 (2011). https://doi.org/10.1007/s00122-010-1448-9
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DOI: https://doi.org/10.1007/s00122-010-1448-9