Evaluation of rumen fatty acid hydrogenation intermediates and differences in bacterial communities after feeding wheat- or corn-based dried distillers grains to feedlot cattle1

Aldai, N., Klieve, A. V., Dugan, M. E. R., Kramer, J. K. G., Ouwerkerk, D., Aalhus, J. L., McKinnon, J. J. and McAllister, T. A. (2012) Evaluation of rumen fatty acid hydrogenation intermediates and differences in bacterial communities after feeding wheat- or corn-based dried distillers grains to feedlot cattle1. Journal of Animal Science, 90 8: 2699-2709. doi:10.2527/jas2010-3671

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Author Aldai, N.
Klieve, A. V.
Dugan, M. E. R.
Kramer, J. K. G.
Ouwerkerk, D.
Aalhus, J. L.
McKinnon, J. J.
McAllister, T. A.
Title Evaluation of rumen fatty acid hydrogenation intermediates and differences in bacterial communities after feeding wheat- or corn-based dried distillers grains to feedlot cattle1
Journal name Journal of Animal Science   Check publisher's open access policy
ISSN 0021-8812
1525-3163
Publication date 2012-08
Sub-type Article (original research)
DOI 10.2527/jas2010-3671
Open Access Status
Volume 90
Issue 8
Start page 2699
End page 2709
Total pages 11
Place of publication Savoy, IL, United States
Publisher American Society of Animal Science
Collection year 2013
Language eng
Formatted abstract
The effect of partially replacing rolled barley (86.6% of control diet) with 20% wheat dried distillers grains plus solubles (DDGS), 40% wheat DDGS, 20% corn DDGS, or 40% corn DDGS (dietary DM basis) on rumen fluid fatty acid (FA) composition and some rumen bacterial communities was evaluated using 100 steers (20 per treatment). Wheat DDGS increased the 11t- to 10t-18:1 ratio (P < 0.05) in rumen fluid and there was evidence that the conversion of trans-18:1 to 18:0 was reduced in the control and wheat DDGS diets but not in the corn DDGS diet. Bacterial community profiles obtained using denaturing gradient gel electrophoresis and evaluated by Pearson correlation similarity matrices were not consistent for diet and, therefore, these could not be linked to different specific rumen FA. This inconsistency may be related to the nature of diets fed (dominant effect of barley), limited change in dietary composition as the result of DDGS inclusion, large animal-to-animal variation, and possibly additional stress as a result of transport just before slaughter. Ruminal densities of a key fiber-digesting bacteria specie that produces 11t-18:1 from linoleic and linolenic acids (Butyrivibrio fibrisolvens), and a lactate producer originally thought responsible for production of 10t,12c-18:2 (Megasphaera elsdenii) were not influenced by diet (P > 0.05).
Keyword Bacterial community
Beef steer
Distillers grains
Fatty acids
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Agriculture and Food Sciences
Official 2013 Collection
 
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Created: Sun, 09 Sep 2012, 09:30:48 EST by Dr Athol Klieve on behalf of School of Agriculture and Food Sciences