title: Using genotyping-by-sequencing (GBS) for genomic discovery in cultivated oat.
abstract: Advances in next-generation sequencing offer high-throughput and cost-effective genotyping alternatives, including genotyping-by-sequencing (GBS). Results have shown that this methodology is efficient for genotyping a variety of species, including those with complex genomes. To assess the utility of GBS in cultivated hexaploid oat (Avena sativa L.), seven bi-parental mapping populations and diverse inbred lines from breeding programs around the world were studied. We examined technical factors that influence GBS SNP calls, established a workflow that combines two bioinformatics pipelines for GBS SNP calling, and provided a nomenclature for oat GBS loci. The high-throughput GBS system enabled us to place 45,117 loci on an oat consensus map, thus establishing a positional reference for further genomic studies. Using the diversity lines, we estimated that a minimum density of one marker per 2 to 2.8 cM would be required for genome-wide association studies (GWAS), and GBS markers met this density requirement in most chromosome regions. We also demonstrated the utility of GBS in additional diagnostic applications related to oat breeding. We conclude that GBS is a powerful and useful approach, which will have many additional applications in oat breeding and genomic studies.
authors.affiliation: Eastern Cereal and Oilseed Research Centre, Agriculture and Agri-Food Canada, Ottawa, Ontario, Canada.
authors.forename: Yung-Fen
authors.initials: YF
authors.lastname: Huang
authors.affiliation: Department of Plant Pathology, Kansas State University, Manhattan, Kansas, United States of America.
authors.forename: Jesse A
authors.initials: JA
authors.lastname: Poland
authors.affiliation: Eastern Cereal and Oilseed Research Centre, Agriculture and Agri-Food Canada, Ottawa, Ontario, Canada.
authors.forename: Charlene P
authors.initials: CP
authors.lastname: Wight
authors.affiliation: General Mills Crop Biosciences, Manhattan, Kansas, United States of America.
authors.forename: Eric W
authors.initials: EW
authors.lastname: Jackson
authors.affiliation: Eastern Cereal and Oilseed Research Centre, Agriculture and Agri-Food Canada, Ottawa, Ontario, Canada.
authors.forename: Nicholas A
authors.initials: NA
authors.lastname: Tinker
mesh_terms: D018554:Avena / Q000235:genetics*; D001947:Breeding; D002874:Chromosome Mapping; D018745:Genome, Plant; D023281:Genomics; D059014:High-Throughput Nucleotide Sequencing; D015810:Linkage Disequilibrium; D020641:Polymorphism, Single Nucleotide