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

Gous, P. W. and Martin, A. and Lawson, W. and Kelly, A. and Fox, G. P. and Sutherland, M. W. (2012) QTL associated with barley (Hordeum vulgare) feed quality traits measured through in situ digestion. Euphytica, 185 (1). pp. 37-45. ISSN 0014-2336

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Article Link(s): http://dx.doi.org/10.1007/s10681-011-0608-6

Abstract

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.

Item Type:Article
Business groups:Horticulture and Forestry Science
Additional Information:Gous, Peter W. Martin, Anke Lawson, Wendy Kelly, Alison Fox, Glen P. Sutherland, Mark W.
Subjects:Plant culture > Field crops > Barley
Science > Biology > Genetics > Quantitative genetics (esp. Quantitative Trait Loci (QTL) articles)
Animal culture > Feeds and feeding. Animal nutrition
Deposited On:09 Apr 2014 22:36
Last Modified:09 Apr 2014 22:36

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