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Articles 1 - 3 of 3
Full-Text Articles in Dairy Science
Physiologic Responses To Feeding Rumen-Protected Glucose To Lactating Dairy Cows, J. A. Sauls-Hiesterman, S. Banuelos, B. Atanasov, B. Bradford, J. S. Stevenson
Physiologic Responses To Feeding Rumen-Protected Glucose To Lactating Dairy Cows, J. A. Sauls-Hiesterman, S. Banuelos, B. Atanasov, B. Bradford, J. S. Stevenson
Kansas Agricultural Experiment Station Research Reports
Lactating Holstein cows were enrolled in a study beginning before first insemination. Cows were supplemented with a rumen-protected glucose (RPG) product to test the hypothesis that circulating progesterone concentrations could be increased by increasing blood glucose, which causes an increase in insulin, subsequently decreasing progesterone clearance by liver enzymes. Supplementation occurred at 0, 2.2, 4.4, or 8.8 lb per head per day to test a dose response. Treatment began 3 days before ovulation and continued until day 12 of the estrous cycle. Rumen-protected glucose did not impact serum concentration of glucose before or after feeding, but the change in insulin …
Dry Period Plane Of Energy: Effects On Glucose Tolerance In Transition Dairy Cows, S. Mann, F. A. Leal Yepes, M. Duplessis, J. J. Wakshlag, T. R. Overton, B. P. Cummings, D. V. Nydam
Dry Period Plane Of Energy: Effects On Glucose Tolerance In Transition Dairy Cows, S. Mann, F. A. Leal Yepes, M. Duplessis, J. J. Wakshlag, T. R. Overton, B. P. Cummings, D. V. Nydam
Physiology Collection
Overfeeding energy in the dry period can affect glucose metabolism and the energy balance of transition dairy cows with potential detrimental effects on the ability to successfully adapt to early lactation. The objectives of this study were to investigate the effect of different dry cow feeding strategies on glucose tolerance and on resting concentrations of blood glucose, glucagon, insulin, nonesterified fatty acids (NEFA), and β-hydroxybutyrate (BHB) in the peripartum period. Cows entering second or greater lactation were enrolled at dry-off (57 d before expected parturition) into 1 of 3 treatment groups following a randomized block design: cows …
Effect Of Cnv Of Production Related Genes On Expression Of Production Traits In Dairy Cattle, Tyler Kamper
Effect Of Cnv Of Production Related Genes On Expression Of Production Traits In Dairy Cattle, Tyler Kamper
Dairy Science
The objective of this project was to determine if copy number variation (CNV) at specific genes related to BST had an effect on milk production. Hair samples from 1000 fresh heifers from Maddox Dairy in Riverdale, CA were sent to Geneseek, a Neogen Company for DNA extraction and processing. The DNA was processed using the BovineSNP50 BeadChip and the data were loaded into the GenomeStudio software. The data were manipulated in GenomeStudio to estimate the CNV at each single nucleotide polymorphism (SNP) of which a vast majority was two. The SNPs with a copy number of two were excluded and …