Association mapping of malting quality traits in UK spring and winter barley cultivar collections

• Published in: Theoretical and applied genetics Vol. 133; no. 9; pp. 2567 - 2582
• Main Authors: Looseley, Mark E., Ramsay, Luke, Bull, Hazel, Swanston, J. Stuart, Shaw, Paul D., Macaulay, Malcolm, Booth, Allan, Russell, Joanne R., Waugh, Robbie, Thomas, William T. B.
• Format: Journal Article
• Language: English
• Published: Berlin/Heidelberg Springer Berlin Heidelberg 01-09-2020; Springer; Springer Nature B.V
• Subjects: Agriculture; Barley; Biochemistry; Biomedical and Life Sciences; Biotechnology; Brewing; Chromosome Mapping; Cultivars; Gene mapping; Genetic Association Studies; Genetic diversity; Genomes; Genotype; Genotypes; Genotyping; Hordeum - genetics; Life Sciences; Original; Original Article; Phenotype; Plant Biochemistry; Plant Breeding; Plant Breeding/Biotechnology; Plant Genetics and Genomics; Quality; Quality management; Quantitative genetics; Quantitative Trait Loci; United Kingdom; Winter; United Kingdom; Canada; United Kingdom > UK
• ISSN: 0040-5752; 1432-2242
• DOI: 10.1007/s00122-020-03618-9

Key message
Historical malting quality data was collated from UK national and recommended list trial data and used in a GWAS. 25 QTL were identified, with the majority from spring barley cultivar sets.
In Europe, the most economically significant use of barley is the production of malt for use in the brewing and distilling industries. As such, selection for traits related to malting quality is of great commercial interest. In order to study the genetic basis of variation for malting quality traits in UK cultivars, a historical set of trial data was collated from national and recommended list trials from the period 1988 to 2016. This data was used to estimate variety means for 20 quality related traits in 451 spring barley cultivars, and 407 winter cultivars. Genotypes for these cultivars were generated using iSelect 9k and 50k genotyping platforms, and a genome wide association scan performed to identify malting quality quantitative trait loci (QTL). 24 QTL were identified in spring barley cultivars, and 2 from the winter set. A number of these correspond to known malting quality related genes but the remainder represents novel genetic variation that is accessible to breeders for the genetic improvement of new cultivars.