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Skip to Search Results- 1Coleman, Patience
- 1Colyn, Jacob J
- 1Foroutan Naddafi, Aidin
- 1Lansink, Nicky
- 1Li, Honghao
- 1Liu, Junhong
- 1Alexander, Trevor (AAFC)
- 1Bork, Edward (Agricultural, Food, and Nutritional Science)
- 1Bruce, Heather Lee (Agricultural, Food and Nutritional Science)
- 1Dr. Changxi Li (Agricultural, Food & Nutritional Science)
- 1Fitzsimmons, Carolyn (Agricultural, Food & Nutritional Science)
- 1Guan, Leluo (Animal Science)
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Intersections of animal production practices on meat quality, intramuscular collagen and expression of genes related to collagen and myofibrillar synthesis and degradation
DownloadSpring 2022
Beef quality, particularly tenderness, continues to be a major challenge in the beef industry resulting in significant economic losses. Beef tenderness is influenced by genetic factors, especially the expression of genes associated with collagen and collagen crosslink synthesis, live production...
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Spring 2021
Approximately 70% of the cost of beef production is impacted by dietary intake. Maximizing production efficiency of beef cattle requires not only genetic selection to maximize feed efficiency (i.e. residual feed intake - RFI), but also adequate nutrition throughout all stages of growth and...
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Assessment of rumen microbiota in beef heifers with different feed efficiency and managed under different feeding systems
DownloadSpring 2020
The linkage between rumen microbiota and feed efficiency has been studied in cattle managed under the drylot system, especially in the feedlot with high-grain diets. However, pasture-based beef operations still dominate the beef production system around the world. In Alberta and other provinces...
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Identification of functional genes for feed efficiency traits via transcriptome analyses to enhance the genomic prediction accuracy in beef cattle
DownloadFall 2019
Residual feed intake (RFI), a measure of feed efficiency, and its component traits including average daily gain (ADG), dry matter intake (DMI) and metabolic weight (MWT) are traits of great economic importance to the beef industry. The genetic improvement of these traits can improve the...
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Novel feed enzyme delivery method: Binding exogenous feed enzymes to Bacillus spores to improve enzyme stability and total tract digestibility
DownloadFall 2018
The effects of binding feed enzymes to Bacillus subtilis (strain RK28) spores on enzyme stability and digestion in cattle were studied in comparison to unbound enzymes. Optimal conditions for adsorbing six different enzymes (α-amylase, β-glucanase, feruloyl esterase, phytase, purified xylanase,...
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Performance and Methane Emissions of RFI Selected Cattle in Drylot and Under Open Range Conditions
DownloadSpring 2018
Residual feed intake (RFI) is a moderately heritable trait that can be used to measure feed efficiency in beef cattle, and thereby reduce feed related costs. RFI has been primarily evaluated under drylot conditions where diet, feed intake and activity levels are controlled and foraging behaviour...
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Relationship of Radiated Heat Loss Measured by Infrared Thermography to Residual Feed Intake in Beef Heifers
DownloadFall 2013
Infrared thermography (IRT) has shown utility in predicting residual feed intake (RFI) differences in mature cows, growing bulls and finishing steers. It was hypothesized that efficient heifers would exhibit decreased radiated heat loss. RFIfat determined on sixty-one crossbred beef heifers over...
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Fall 2013
This thesis research was aimed to develop a residual feed intake (RFI) prediction equation in dairy cattle while accounting for the animals’ multifunctional lactation non-linear energy requirements profiles. The possibility of shortening RFI test period and finding indicator traits for RFI...
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Patterns of Genomic Variation and Whole Genome Association Studies of Economically Important Traits in Cattle
DownloadFall 2012
Functionally important genetic variations in cattle have great potential as tools to increase agricultural production once they are identified through association studies of phenotype and genotype. The objectives of this thesis were: 1) to characterize the genome-wide patterns of linkage...