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Quantitative trait loci of barley malting quality trait components in the Stellar/01Ab8219 mapping population |
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| Authors: | Emir Islamovic Donald E Obert Allen D Budde Mark Schmitt Robert Brunick II Andrzej Kilian Shiaoman Chao Gerard R Lazo Juliet M Marshall Eric N Jellen Peter J Maughan Gongshe Hu Kathy E Klos Ryan H Brown Eric W Jackson |
| Institution: | 1. USDA ARS, 1691 S. 2700 W., Aberdeen, ID, 83210, USA 3. Limagrain Cereal Seeds, 4846 East 450 North, Lafayette, IN, 47905, USA 6. USDA ARS Cereal Crop Research Unit, 502 Walnut St., Madison, WI, 53726, USA 10. MillerCoors, 7 N 400 W, Burley, ID, 83318, USA 7. Diversity Arrays Technology, 1 Wilf Crane Cr., Yarralumla, ACT, 2600, Australia 8. USDA ARS, 1605 Albrecht Blvd., Fargo, ND, 58105, USA 9. USDA ARS, 800 Buchanan St., Albany, CA, 94710, USA 4. Department of Plant, Soil, and Entomological Sciences, University of Idaho, 1776 Science Center Dr. Suite 205, Idaho Falls, ID, 83660-9637, USA 5. Department of Plant and Wildlife Sciences, Brigham Young University, Provo, UT, 84602, USA 2. General Mills, Inc., 150 Research Campus Dr., Kannapolis, NC, 28081, USA |
| Abstract: | Malting barley is of high economic and scientific importance. Determining barley grains that are suitable for malting involves measuring malting quality, which is an expensive and complex process. In order to decrease the cost of phenotyping and accelerate the process of developing superior malting barley cultivars, markers for marker-assisted breeding are needed. In this study, we identified quantitative trait loci (QTLs) for malting traits in a Stellar/01Ab8219 F6:8 recombinant inbred line population grown at Aberdeen and Tetonia, Idaho, USA in 2009 and 2010. We identified QTLs associated with malt extract (ME), wort protein, soluble/total protein (S/T), diastatic power (DP), alpha-amylase, beta-glucan (BG) and free amino nitrogen (FAN) at a logarithm of odds score ≥2.5 using a high-density genetic map produced by merging Diversity Arrays Technology markers with the current single nucleotide polymorphism map. Novel QTLs were identified for DP and FAN on chromosome 5H, S/T on 6H, and BG and ME on 7H. Dissection of the genetic regions associated with malting traits suggests the involvement of multiple molecular pathways. The resulting molecular markers may prove useful for barley improvement. |
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