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Rumen Fluid Metabolomics Analysis Associated with Feed Efficiency on Crossbred Steers
Virginia M Artegoitia1, Andrew P Foote2, Ronald M Lewis1
1University of Nebraska-Lincoln, Department of Animal Science, Lincoln, NE, 68583, USA.
Scientific Reports
|June 8, 2017
Summary
Rumen fluid analysis revealed key metabolic differences linked to average daily gain (ADG) in steers. Specifically, altered linoleic and alpha-linolenic acid metabolism in the rumen may impact steer growth efficiency.
Area of Science:
- Animal Science
- Metabolomics
- Ruminant Nutrition
Background:
- The rumen plays a critical role in ruminant digestion efficiency.
- Understanding variations in rumen function is crucial for improving average daily gain (ADG).
Purpose of the Study:
- To identify differences in rumen metabolites associated with varying ADG in steers.
- To explore the relationship between specific metabolic pathways and growth performance.
Main Methods:
- Rumen fluid metabolomic analysis using Liquid Chromatography-Mass Spectrometry (LC-MS).
- Multivariate and univariate statistical analyses to identify differential metabolites.
- Measurement of individual feed intake and body weight in 144 steers over 105 days.
Main Results:
- 33 metabolites in rumen fluid differed significantly between high-ADG and low-ADG groups.
- Metabolites involved in linoleic and alpha-linolenic acid metabolism were down-regulated in high-ADG steers.
- Ruminal biohydrogenation pathways showed potential association with overall animal production.
Conclusions:
- Rumen fluid metabolomics can differentiate steers based on growth performance.
- Alterations in fatty acid metabolism, particularly linoleic and alpha-linolenic acid pathways, are linked to ADG.
- These findings suggest ruminal biohydrogenation influences steer productivity.
