QTL associated with barley (Hordeum vulgare) feed quality traits measured through in situ digestion

Gous, Peter W. and Martin, Anke and Lawson, Wendy and Kelly, Alison and Fox, Glen P. and Sutherland, Mark W. (2012) QTL associated with barley (Hordeum vulgare) feed quality traits measured through in situ digestion. Euphytica: International Journal on Plant Breeding, 185 (1). pp. 37-45. ISSN 0014-2336


Barley (Hordeum vulgare) is a major feed source for the intensive livestock industry. Competitiveness against other cereal grains depends largely on the price per unit of expressed feed quality. The traits which contribute to feed quality in barley are largely quantitative in nature but little is known about their genetic control. A study to identify the quantitative trait loci (QTLs) associated with feed quality was performed using a F6-derived recombinant inbred barley population. Samples from each line were incubated in the rumen of fistulated cattle, recovered, washed and dried for determination of in situ dry matter digestibility. Additionally, both pre- and post-digestion samples were analysed to quantify the content of key quality components relating to acid detergent fibre, total starch and protein. The data was used to identify trait-associated QTLs. Genetic analysis identified significant QTLs on chromosomes 2H, 5H and 7H. Genetic markers linked to these QTL should provide an effective tool for the selection and improvement of feed barley in the future.

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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Permanent restricted access to published version in accordance with the copyright policy of the publisher.
Faculty / Department / School: Historic - Faculty of Sciences - Department of Biological and Physical Sciences
Date Deposited: 26 Aug 2012 06:15
Last Modified: 21 Jul 2014 05:02
Uncontrolled Keywords: ADF; barley; DMD; feed quality; protein; QTL; starch
Fields of Research : 06 Biological Sciences > 0604 Genetics > 060412 Quantitative Genetics (incl. Disease and Trait Mapping Genetics)
07 Agricultural and Veterinary Sciences > 0703 Crop and Pasture Production > 070305 Crop and Pasture Improvement (Selection and Breeding)
15 Commerce, Management, Tourism and Services > 1503 Business and Management > 150313 Quality Management
Socio-Economic Objective: B Economic Development > 82 Plant Production and Plant Primary Products > 8205 Winter Grains and Oilseeds > 820501 Barley
Identification Number or DOI: 10.1007/s10681-011-0608-6
URI: http://eprints.usq.edu.au/id/eprint/21527

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