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Full-Text Articles in Medicine and Health Sciences
Evaluation Of Genomic Predictors For Red Angus Cattle, Stephen D. Kachman, Matthew L. Spangler
Evaluation Of Genomic Predictors For Red Angus Cattle, Stephen D. Kachman, Matthew L. Spangler
Nebraska Beef Cattle Reports
Purebred Red Angus genotypes, via the Ilumina BovineSNP50 assay, and expected progeny differences (EPD) were used to evaluate the accuracy of genomic predictors for traits that are currently reportedthrough the American Red AngusAssociations’ National Cattle Evaluation. Two genomic predictors were evaluated, one derived using prediction equations from the National Beef Cattle Evaluation Consortium and the other from Zoetis.
Comparison Of Long-Term Progestin-Based Synchronization Protocols On Fixed-Time Ai Pregnancy Rate In Beef Heifers, Rebecca A. Vraspir, Adam F. Summers, Doug O'Hare Hare, Larry D. Rowden, Rick N. Funston
Comparison Of Long-Term Progestin-Based Synchronization Protocols On Fixed-Time Ai Pregnancy Rate In Beef Heifers, Rebecca A. Vraspir, Adam F. Summers, Doug O'Hare Hare, Larry D. Rowden, Rick N. Funston
Nebraska Beef Cattle Reports
Yearling Angus heifers at a commercial ranch in the Nebraska Sandhills were randomly assigned to one of two progestin-based fixed-time AI protocols (MGA or 14-day CIDR) to compare pregnancy rates. Heifers had similar fixed-time AI pregnancy rates between MGA and 14-day CIDR. A similar proportion of MGA and 14-day CIDR heifers displayed a second estrus; however, heifers previously synchronized with MGA tended to have a greater second AI pregnancy rate. Overall pregnancy rate was similar between MGA and 14-day CIDR treatments. The MGA system was the more cost effective synchronization protocol in this study.
Effect Of Distillers Grains Plus Solubles Supplementation On Grazing Cattle Performance, Tyler L. Hasenauer, Terry J. Klopfenstein, James C. Macdonald Donald, Cody J. Schneider, Dirk B. Burken
Effect Of Distillers Grains Plus Solubles Supplementation On Grazing Cattle Performance, Tyler L. Hasenauer, Terry J. Klopfenstein, James C. Macdonald Donald, Cody J. Schneider, Dirk B. Burken
Nebraska Beef Cattle Reports
Yearlings rotationally grazing smooth bromegrass were individually supplemented modified distillers grains plus solubles (MDGS) at .05, 0.4, 0.6, and 0.8% BW. Gain increased quadratically as MDGS level increased. Maximal ADG (2.95 lb/d) was predicted when supplementing level of 0.48% of BW. Economic analysis compared 0, 2, and 5 lb (DM) MDGS supplementation. When cattle ownership was retained through the feeding period, MDGS supplementation was profitable. Supplementation at 2 lb (DM) was more profitable than 5 lb (DM) when MDGS is above $265.63/ton (DM) or 85% the price of $7.50 /bu corn.
Effect Of Winter Supplementation Level On Yearling System Profit Across Economic Scenarios, Kari L. Gillespie, Terry J. Klopfenstein, James C. Macdonald Donald, Brandon L. Nuttelman, Cody J. Schneider
Effect Of Winter Supplementation Level On Yearling System Profit Across Economic Scenarios, Kari L. Gillespie, Terry J. Klopfenstein, James C. Macdonald Donald, Brandon L. Nuttelman, Cody J. Schneider
Nebraska Beef Cattle Reports
Calves backgrounded in a forage–based, yearling system at a greater ADG maintained a performance advantage through finishing. High-level supplemented cattle gained an additional 0.18 lb daily during finishing and produced an additional 81 lb of saleable live weight compared to cattle backgrounded at a low-supplementation level. Across four economic scenarios with varying corn and distillers prices, high-level supplemented cattle returned $55.54 more than cattle fed a low level of supplementation during the winter backgrounding phase. Corn price would have to exceed $11.70/bu for high supplementation level to no longer be profitable.
Replacement Of Grazed Forage And Animal Performance When Distillers Grains Are Fed In A Bunk Or On The Ground On Summer Range, Kari L. Gillespie, L. Aaron Stalker, Terry J. Klopfenstein Klopfenstein, Jerry D. Volesky, Jacki A. Musgrave
Replacement Of Grazed Forage And Animal Performance When Distillers Grains Are Fed In A Bunk Or On The Ground On Summer Range, Kari L. Gillespie, L. Aaron Stalker, Terry J. Klopfenstein Klopfenstein, Jerry D. Volesky, Jacki A. Musgrave
Nebraska Beef Cattle Reports
Forage savings and supplement loss caused by feeding on the ground were estimated when spayed yearling heiferswere fed modified distillers grains with solubles (MDGS) while grazing Sandhills summer range. Across two years, heifers fed 0.6% BW MDGS had 1.39 lb greater ADG and consumed approximately 17% less forage than non-supplemented heifers. Calculated loss of MDGS when fed on the ground was 5.6%. Supplementing MDGS decreased forage consumption approximately 17% and increased summer gains.
Effects Of Forage Quality, Mdgs, And Monensin On Performance, Methane Concentration, And Ruminal Fermentation Of Growing Cattle, Anna C. Pesta, Andrea K. Watson, Samodha Fernando Fernando, Galen E. Erickson
Effects Of Forage Quality, Mdgs, And Monensin On Performance, Methane Concentration, And Ruminal Fermentation Of Growing Cattle, Anna C. Pesta, Andrea K. Watson, Samodha Fernando Fernando, Galen E. Erickson
Nebraska Beef Cattle Reports
A growing study was conducted to evaluate a novel method for measuring methane concentration by feedlot cattle, and to determine the effects of forage quality, inclusion of modified distillers grains plus solubles (MDGS), and presence or absence of monensin on performance, methane concentration, and rumen fermentation characteristics. Performance was improved by use of high-quality forage and MDGS, while response to monensin was variable across basal diet type. Response of methane concentration and volatile fatty acid (VFA) profile due to diet was variable and subject to multiple interactions, reflecting the complexity of the microbial processes involved within the rumen.
Effects Of Winter Supplementation On Cow Performance And Post-Weaning Management On Steer And Heifer Progeny In A Late Spring Calving System, John D. Harms, Rick N. Funston, L. Aaron Stalker Stalker, Jacqueline A. Musgrave, Andrew F. Applegarth, Adam F. Summers
Effects Of Winter Supplementation On Cow Performance And Post-Weaning Management On Steer And Heifer Progeny In A Late Spring Calving System, John D. Harms, Rick N. Funston, L. Aaron Stalker Stalker, Jacqueline A. Musgrave, Andrew F. Applegarth, Adam F. Summers
Nebraska Beef Cattle Reports
The objective of this experiment was to evaluate the effects of winter supplementation while grazing dormant Sandhills winter range or meadow on cow performance and the effects of post-weaning management on steer and heifer progeny. Winter treatment had no effect on cow BCS or BW at precalving, prebreeding, and weaning. Steers and heifers fed hay gained more BW during winter treatment compared to those grazing meadow, but post-weaning management had no subsequent effects on steer or heifer progeny.
Effects Of Increasing Inclusion Of Wet Distillers Grains Plus Solubles With And Without Oil Extraction On Finishing Performance, Melissa L. Jolly, Brandon L. Nuttelman, Dirk Burken Burken, Cody J. Schneider, Terry J. Klopfenstein, Galen E. Erickson
Effects Of Increasing Inclusion Of Wet Distillers Grains Plus Solubles With And Without Oil Extraction On Finishing Performance, Melissa L. Jolly, Brandon L. Nuttelman, Dirk Burken Burken, Cody J. Schneider, Terry J. Klopfenstein, Galen E. Erickson
Nebraska Beef Cattle Reports
A finishing study was conducted to assess the effects of feeding increasing amounts of wet distillers grains plus solubles (WDGS) with and without corn oil removal. Oil removal and WDGS inclusion did not interact. Compared to normal oil, de-oiled WDGS did not impact ADG, F:G, or carcass characteristics. Increasing inclusion of WDGS decreasedDMI and F:G linearly, with no change in ADG. Regardless of inclusion, oil removal via centrifugation had little impact on finishing cattle performance.
Optimum Inclusion Of Alkaline-Treated Cornstalks And Distillers Grains Fed To Calf-Fed Steers, Sarah J. Peterson, Brandon L. Nuttelman, Cody J. Schneider Schneider, Dirk B. Burken, James C. Macdonald, Galen E. Erickson
Optimum Inclusion Of Alkaline-Treated Cornstalks And Distillers Grains Fed To Calf-Fed Steers, Sarah J. Peterson, Brandon L. Nuttelman, Cody J. Schneider Schneider, Dirk B. Burken, James C. Macdonald, Galen E. Erickson
Nebraska Beef Cattle Reports
A finishing study evaluated the effects of adding 10, 20 or 30% CaO treated cornstalks to diets containing either 20 or 40% (DM basis) modified distillersgrains (MDGS). Steers fed a diet containing 40% MDGS responded quadratically with 10 and 20% (DM basis) treated residue having equal and better F:G than feeding 30% treated stalks. However, cattle fed 20% MDGS did not respond as well to treated cornstalks with 10% treated stalks having the lowest F:G, but poorer than the control diet with 5% stalks and 20% MDGS.
Use Of Treated Corn Residues In Growing Diets, Sarah J. Peterson, Dirk B. Burken, James C. Macdonald Donald, Galen E. Erickson
Use Of Treated Corn Residues In Growing Diets, Sarah J. Peterson, Dirk B. Burken, James C. Macdonald Donald, Galen E. Erickson
Nebraska Beef Cattle Reports
A growing study compared the effectsof pelleting corn residue and treating with calcium oxide or calcium hydroxide. All diets contained 60% corn residue, 36% distillers products, and 4% supplement (DM basis). Steers consuming pelleted diets had increased DMI, greater ending BW, but poorer F:G compared to non-pelleted treatments. Diets containing the chemically treated corn stover had increased ADG and lower F:G compared to the non-treated diets. While both pelleting and chemical treatment with CaO increased DMI, and ADG, only the use of CaO improved feed efficiency.
Effect Of Feeding De-Oiled Wet Distillers Grains Plus Solubles On Beef Fatty Acid Profiles, Katherine I. Domenech, Kim A. Varnold, Michelle E. Semler Semler, Michael D. Chao, Tommi F. Jones, Galen E. Erickson, Chris R. Calkins
Effect Of Feeding De-Oiled Wet Distillers Grains Plus Solubles On Beef Fatty Acid Profiles, Katherine I. Domenech, Kim A. Varnold, Michelle E. Semler Semler, Michael D. Chao, Tommi F. Jones, Galen E. Erickson, Chris R. Calkins
Nebraska Beef Cattle Reports
A total of 336 steers were fed one of seven finishing diets: a corn-based control, 35%, 50%, or 65% inclusion of wet distillers grains plus solubles (WDGS), either traditional (full-fat) or de-oiled. At harvest, 15 low USDA Choice carcasses within each dietary treatment (n = 105) were selected to evaluate the effect of diet on the fatty acid profile of strip loin steaks aged seven days. Feeding WDGS increased the amount of polyunsaturated fatty acids (PUFA) in comparison to a corn based diet. Feeding de-oiled WDGS resulted in less PUFA’s than the full-fat WDGS diets. It seems that the removal …
Effect Of Feeding Different Types Of Byproducts And Concentrations Throughout A Beef Growing System On Ground Beef Color And Lipid Oxidation, Joe O. Buntyn, Brandy D. Cleveland, Amy L. Redfield Redfield, James C. Macdonald, Galen E. Erickson, Tommi F. Jones, Ty B. Schmidt, Gary A. Sullivan
Effect Of Feeding Different Types Of Byproducts And Concentrations Throughout A Beef Growing System On Ground Beef Color And Lipid Oxidation, Joe O. Buntyn, Brandy D. Cleveland, Amy L. Redfield Redfield, James C. Macdonald, Galen E. Erickson, Tommi F. Jones, Ty B. Schmidt, Gary A. Sullivan
Nebraska Beef Cattle Reports
The objective of this trial was to evaluate the effect of feeding different concentrations of wet distillers grains during winter backgrounding and either modified wet distillers grains or Sweet Bran® during the finishing phase on ground beef color and lipid oxidation. After a 14 day aging period, ground beef patties were made and placed in a simulated retail display for seven days. There were no overall differences in lipid oxidation between treatments but was a treatment by day interaction for discoloration. Ground beef from heifers finished with modified wet distillers grains discolored at a greater extent when compared to …
Effect Of Micro-Aid® Supplementation On Nitrogen Losses From Manure, Andrea K. Watson, Galen E. Erickson, Terry J. Klopfenstein Klopfenstein, Mike J. Rincker
Effect Of Micro-Aid® Supplementation On Nitrogen Losses From Manure, Andrea K. Watson, Galen E. Erickson, Terry J. Klopfenstein Klopfenstein, Mike J. Rincker
Nebraska Beef Cattle Reports
A 2x2 factorial designed experiment was used to study the effects of Micro-Aid and time on OM and N losses from manure, in a simulated feedlot pen setting. Manure was collected from cattle on a common diet, except for the addition of 1 g Micro-Aid /steer daily. Losses of OM were greater at 60 d than 30 d, and greater for control than Micro-Aid. Nitrogen losses at d 30 were similar between treatments but control pans had greater N losses at d 60. Feeding Micro-Aid to cattle may inhibit N volatilization from manure, enhancing the fertilizer value of manure.
The Effects Of Diet On The Biochemical Constituents Of Beef, Kimberly A. Varnold, Chris R. Calkins, Brandon L. Nuttelman Nuttelman, Lasika S. Senaratne-Lenagala, Justine J. Stevenson, Michelle E. Semler, Michael D. Chao, Tommi F. Jones, Galen E. Erickson
The Effects Of Diet On The Biochemical Constituents Of Beef, Kimberly A. Varnold, Chris R. Calkins, Brandon L. Nuttelman Nuttelman, Lasika S. Senaratne-Lenagala, Justine J. Stevenson, Michelle E. Semler, Michael D. Chao, Tommi F. Jones, Galen E. Erickson
Nebraska Beef Cattle Reports
Crossbred steers (n = 64) were grazed on warm- or cool-season grasses, without or with energy supplementation of wet distillers grains with solubles (WDGS), and were finished on a corn-based diet with or without 35% WDGS. Grass-type was the major contributor in determining the biochemical composition of L. dorsi steaks, with warm-season grasses causing increased concentrations of moisture and zinc and decreased concentrations of magnesium. Aging 28 days instead of 7 days increased pH and caused an increased concentration of carbohydrates, and non-heme and heme iron in B. femoris steaks. Diet, especially grass type, during grazing, can alter the end …
Grass Type, Grazing Supplementation, And Finishing Diets Affect Beef Fatty Acids, Kimberly A. Varnold, Chris R. Calkins, Brandon L. Nuttelman Nuttelman, Lasika S. Senaratne-Lenagala, Tommi F. Jones, Timothy P. Carr, Galen E. Erickson
Grass Type, Grazing Supplementation, And Finishing Diets Affect Beef Fatty Acids, Kimberly A. Varnold, Chris R. Calkins, Brandon L. Nuttelman Nuttelman, Lasika S. Senaratne-Lenagala, Tommi F. Jones, Timothy P. Carr, Galen E. Erickson
Nebraska Beef Cattle Reports
Crossbred steers (n = 64) were grazed on warm- or cool-season grasses, without or with energy supplementation of wet distillers grains with solubles (WDGS), and were finished on a corn-based diet with or without 35% WDGS. Grass type was the major contributor in determining the fatty acid profile, especially in the neutral lipid layer. Warm-season grasses decreased concentrations of most fatty acids compared to cool-season grasses. The provision of WDGS as an energy supplement while grazing dissipated any differences caused by grass type.
The Effects Of Diet And Cooler Aging On Specific Flavor Notes In Beef, Kimberly A. Varnold, Chris R. Calkins, Rhonda K. Miller Miller, Galen E. Erickson
The Effects Of Diet And Cooler Aging On Specific Flavor Notes In Beef, Kimberly A. Varnold, Chris R. Calkins, Rhonda K. Miller Miller, Galen E. Erickson
Nebraska Beef Cattle Reports
Crossbred steers (n = 64) were grazed on warm- or cool-season grass-dominated pastures, without or with energy supplementation of wet distillers grains with solubles (WDGS), and were finished on a corn-based diet with or without 35% WDGS. Finishing on corn increased desirable flavor notes and decreasedundesirable flavor notes in both L. dorsi and B. femoris steaks. In addition, grazing on warm-season grasses increased the prevalence of undesirable flavors but was often dissipated by the addition WDGS supplementation. Longer aging periods tended to increase the prevalence of undesirable flavors, especially in B. femoris steaks. It is recommended producers provide WDGS supplementation, …
Effects Of Dietary Change On Viral-Bacterial Interactions In The Rumen Of Cattle, Christopher L. Anderson, Melissa L. Jolly, Adam L. Shreck Shreck, Galen E. Erickson, Terry J. Klopfenstein, Samodha C. Fernando
Effects Of Dietary Change On Viral-Bacterial Interactions In The Rumen Of Cattle, Christopher L. Anderson, Melissa L. Jolly, Adam L. Shreck Shreck, Galen E. Erickson, Terry J. Klopfenstein, Samodha C. Fernando
Nebraska Beef Cattle Reports
This ongoing study investigates the impact of diet and bacteriophage activity on the structuring of rumen microbial community composition and diversity. Fistulated cattle were acclimated to a given diet for 21 days before samples were collected and subsequently enriched for viral particles with tangential flow filtration. Taxonomic identification, abundance, and functional attributes were assigned to both bacterial and viral communities. Principle coordinate analysis of the bacterial communities revealed significant clustering based on diet. While diet drives the structuring of rumen bacterial communities, bacteriophages may maintain high, constant bacterial diversity.
Vein Steak Differences In Strip Loins Of Heifers Due To Mutation Of The Myostatin Gene, Michelle E. Semler, Chris R. Calkins, Galen E. Erickson Erickson
Vein Steak Differences In Strip Loins Of Heifers Due To Mutation Of The Myostatin Gene, Michelle E. Semler, Chris R. Calkins, Galen E. Erickson Erickson
Nebraska Beef Cattle Reports
Strip loins from heifers with variations of the myostatin gene; 19 homozygous dominant (Angus), 20 heterozygous dominant (Angus x Piedmontese), and 20 homozygous recessive (Piedmontese) were studied. Strip loins were cut into 1-inch thick steaks and total number of steaks and number of steaks with Gluteusmedius (often called vein steaks) were recorded. Strip loins from heterozygous dominant heifershad a greater number of non-vein steaks and decreased percentage of vein steaks compared to homozygous dominant and homozygous recessive samples. Differences in percentage of vein steaks were inconsistent and showed no meaningful pattern.
Energy Value Of De-Oiled Modified Distillers Grains Plus Solubles In A Forage-Based Diet, Meredith L. Bremer, Andrea K. Watson, Dirk B. Burken Burken, James C. Macdonald, Galen E. Erickson
Energy Value Of De-Oiled Modified Distillers Grains Plus Solubles In A Forage-Based Diet, Meredith L. Bremer, Andrea K. Watson, Dirk B. Burken Burken, James C. Macdonald, Galen E. Erickson
Nebraska Beef Cattle Reports
Sixty individually fed steers were used to determine the effects of feeding de-oiled modified distillers grains plus solubles (MDGS) on steer performance in an 84-day forage-based growing study. De-oiled MDGS did not significantly alter performance when compared to normal MDGS if fed at the same concentration in growing diets. Inclusion of either de-oiled or normal MDGS at 40% of the diet resulted in improved ending BW, DMI, ADG, and F:G as compared to inclusion of 20% MDGS in the diet.
Transitioning Cattle From Ramp® To A Finishing Diet On Feedlot Performance And Feed Intake Variance, Cody J. Schneider, Brandon L. Nuttelman, Dirk B. Burken Burken, Terry J. Klopfenstein, Galen E. Erickson
Transitioning Cattle From Ramp® To A Finishing Diet On Feedlot Performance And Feed Intake Variance, Cody J. Schneider, Brandon L. Nuttelman, Dirk B. Burken Burken, Terry J. Klopfenstein, Galen E. Erickson
Nebraska Beef Cattle Reports
Individually fed cattle were adapted to high grain diets with a traditional grain adaptation program or one of two RAMP® adaptation programs. RAMP programs adapted cattle to a finishing diet gradually over 28 days in four steps or directly without an adaptation. Feed intake variance among d was greater for traditionally adapted cattle compared to either RAMP program, but DMI was not different during the adaptation period. Over the 138-day period, feedlot performance and carcass traits were not affected by adaptation treatment. Cattle fed RAMP for 10 days can be transitioned to a finishing ration containing 47.5% Sweet Bran …
Using Enspira™ To Improve Fiber Digestion, Jana L. Harding, Galen E. Erickson, James C. Macdonald Donald
Using Enspira™ To Improve Fiber Digestion, Jana L. Harding, Galen E. Erickson, James C. Macdonald Donald
Nebraska Beef Cattle Reports
Two experiments evaluated the effectof treating various feedstuffs with an enzyme(Enspira) on digestibility. Twelve feeds commonly fed to beef cattle were treated with four levels of the enzyme(0, 0.25, 0.50, or 0.75 lb of enzyme per ton of DM). Enzyme treatment increased in vitro DMD of high moisture corn (HMC), wet distillers grains plus solubles (WDGS), corn bran, and husks. There was a quadratic increasein gas production for corn leaves, as well as a linear increase in gas production for corn bran treated with increasing levels of Enspira. Treating feeds with the commercial enzyme Enspiraimproved in vitro digestibility of feeds …
Nutrient And Tenderness Differences Of Beef From Heifers Due To Mutation Of The Myostatin Genehypothesized, Michelle E. Semler, Chris R. Calkins, Galen E. Erickson Erickson
Nutrient And Tenderness Differences Of Beef From Heifers Due To Mutation Of The Myostatin Genehypothesized, Michelle E. Semler, Chris R. Calkins, Galen E. Erickson Erickson
Nebraska Beef Cattle Reports
Strip loins and eye of rounds were obtained from heifers genotyped with variations of the myostatin gene; 19 homozygous dominant (Angus), 20 heterozygous dominant (Angus x Piedmontese), and 20 homozygous recessive (Piedmontese). Steaks were aged for 14 days, cooked fresh (never frozen), and nutrient steaks were frozen three days postmortem. Meat from homozygous recessive heifers was equal in tenderness to homozygous dominant and heterozygous dominant heifers. Fat content of meat from homozygous recessive heifers decreased while moisture and protein increased compared to homozygous dominant and heterozygous dominant. Calorie content decreased with increasing copies of the recessive gene. Thus, meat from …
Effect Of Feeding De-Oiled Wet Distillers Grains Plus Solubles On Beef Oxidation And Tenderness, Katherine I. Domenech, Kim A. Varnold, Michelle E. Semler, Michael D. Chao, Tommi F. Jones, Galen E. Erickson, Chris R. Calkins
Effect Of Feeding De-Oiled Wet Distillers Grains Plus Solubles On Beef Oxidation And Tenderness, Katherine I. Domenech, Kim A. Varnold, Michelle E. Semler, Michael D. Chao, Tommi F. Jones, Galen E. Erickson, Chris R. Calkins
Nebraska Beef Cattle Reports
Cattle fed a de-oiled wet distiller’s grains plus solubles (WDGS) diet were compared to cattle fed corn or traditional (full-fat) WDGS diets to determine effects on discoloration, oxidation, and tenderness of beef aged for seven and 21 days. At seven days of aging, dietary treatment had no effect on discoloration. At 21 days of aging, beef from cattle fed de-oiled WDGS had less oxidation than the corn control and several of the full-fat WDGS treatments. Although tenderness increased with aging and retail display, dietary treatment had no effect on tenderness. These findings suggest that these dietary treatments, followed by a …
Effects Of Feeding Distillers Grains In A Yearling Beef System On Meat Quality, Kelby M. Sudbeck, Kimberly A. Varnold, James C. Macdonald Donald, Chris R. Calkins, Galen E. Erickson
Effects Of Feeding Distillers Grains In A Yearling Beef System On Meat Quality, Kelby M. Sudbeck, Kimberly A. Varnold, James C. Macdonald Donald, Chris R. Calkins, Galen E. Erickson
Nebraska Beef Cattle Reports
Distillers grains use while wintering on cornstalks during summer grazing and during the finishing period was evaluated to determine the effects of lifetime exposure to distillers grains on meat characteristics. Finishing diets with distillers grains increased discoloration in steaks following six days of retail display for steaks aged seven days, and after four days of retail display for steaks aged 21 days. Supplementation during summer grazing increased discoloration when cattle were not finished using distillers grains. There were no differences in oxidative rancidity among dietary treatments. Supplementing with distillers grains prior to finishing was not additive in impacting the color …
Differences In Fecal Bacterial Community Composition Between Beef Steers Which Are High-Shedders And Low-Shedders Of Shiga Toxin-Producing Escherichia Coli (Stec), Nirosh D. Aluthge, Yoshitha A. Wanniarachchi, Brandon L. Nuttelman Nuttelman, Cody J. Schneider, Terry J. Klopfenstein, Galen E. Erickson, Samodha C. Fernando
Differences In Fecal Bacterial Community Composition Between Beef Steers Which Are High-Shedders And Low-Shedders Of Shiga Toxin-Producing Escherichia Coli (Stec), Nirosh D. Aluthge, Yoshitha A. Wanniarachchi, Brandon L. Nuttelman Nuttelman, Cody J. Schneider, Terry J. Klopfenstein, Galen E. Erickson, Samodha C. Fernando
Nebraska Beef Cattle Reports
The community composition of the fecal microbiota was compared between beef steers which were high-shedders and low-shedders of Shiga toxin-producing Escherichia coli. Based on Shannon and Chao 1 diversity indices, the high-shedders had a more diverse fecal bacterial community than the low-shedding steers. Members of the genus Prevotella were observed as being more abundant in the low-shedders compared to the high-shedders, while Succinivibrio were more abundant in the high-shedders. Isolation of specific bacteria which are significantly more abundant in low-shedders may pave the way to developing direct-fed microbials which are effective in reducing STEC shedding among high-shedding beef steers.
Follicular Vascular Endothelial Growth Factor A Expression Before And After The Lh Surge, Renee M. Mcfee, Robin A. Artac, Adam F. Summers, William E. Pohlmeier, Vanessa M. Brauer, Scott G. Kurz, Robert A. Cushman, Jennifer R. Wood, Andrea S. Cupp
Follicular Vascular Endothelial Growth Factor A Expression Before And After The Lh Surge, Renee M. Mcfee, Robin A. Artac, Adam F. Summers, William E. Pohlmeier, Vanessa M. Brauer, Scott G. Kurz, Robert A. Cushman, Jennifer R. Wood, Andrea S. Cupp
Nebraska Beef Cattle Reports
Granulosa cell expression of VEGFAisoforms in dominant bovine follicles was evaluated. Collection of granulosa cells via follicle aspiration revealed altered expression of the proangiogenic VEGFA_164 isoform but not the antiangiogenic VEGFA_164B isoform prior to and after the LH surge. Expression of VEGFA_164 declines as both the LH surge and ovulation approaches. In addition, VEGFA_164 and VEGFA_164B expression prior to the LH surge was positively correlated with FSHR and CYP19A1 expression, suggesting that VEGFA expression may be regulated by FSH. These data indicate differential expression of VEGFA isoforms may be an important feature of bovine dominant follicle development.
Androgen Excess In Beef Cows Results In Altered Theca Cell Gene Expression And Fertilityand, Adam F. Summers, William E. Pohlmeier, Vanessa M. Brauer Brauer, Kevin M. Sargent, Renee M. Mcfee, Scott G. Kurz, Robert A. Cushman, Jennifer R. Wood, Andrea S. Cupp
Androgen Excess In Beef Cows Results In Altered Theca Cell Gene Expression And Fertilityand, Adam F. Summers, William E. Pohlmeier, Vanessa M. Brauer Brauer, Kevin M. Sargent, Renee M. Mcfee, Scott G. Kurz, Robert A. Cushman, Jennifer R. Wood, Andrea S. Cupp
Nebraska Beef Cattle Reports
Within the University of Nebraska–Lincoln physiology herd, two sub-populations of cows with different concentrations of androstenedione have been identified. Androstenedione is a precursor for estradiol production, and androstenedione concentration is increased 24.5-fold in the high androstenedione cows. Our objective was to determine the cause of increased androstenedione production in high androstenedione cows and the effects on theca cell and oocyte gene expression. High androstenedione cows had increased steroidogenic enzyme abundance in theca cells and altered oocyte mRNA abundance. Increased androgen production in high androstenedione cows is associated with altered gene expression and/or mRNA stability during oocyte growth and maturation, which …
Effect Of Pubertal Status And Number Of Estrous Cycles Prior To The Breeding Season On Pregnancy Rate In Beef Heifers, Rebecca A. Vraspir, Adam F. Summers, Andrew J. Roberts Roberts, Rick N. Funston
Effect Of Pubertal Status And Number Of Estrous Cycles Prior To The Breeding Season On Pregnancy Rate In Beef Heifers, Rebecca A. Vraspir, Adam F. Summers, Andrew J. Roberts Roberts, Rick N. Funston
Nebraska Beef Cattle Reports
Three experiments were conducted to evaluate whether pubertal status and number of estrous cycles prior to breeding influences pregnancy rate in beef heifers. Pubertal heifers were heavier and older at the start of breeding and had greater AI and overall pregnancy rate than non-pubertal heifers. Second season pregnancy rate was greater for heifers reaching puberty prior to first breeding and for heifers having ≥ 2 estrouscycles prior to breeding compared with non-pubertal heifers. Pregnancy rate was greater for heifers achieving puberty prior to breeding; however, earlier onset of puberty did not significantly improve first pregnancy rates.
Economics Of Distillers Grains Supplementation In A Forage System With Spayed Heifers, Kari L. Gillespie, Terry J. Klopfenstein, James C. Macdonald Donald, Brandon L. Nuttelman, Cody J. Schneider, Galen Erickson, J. D. Volesky
Economics Of Distillers Grains Supplementation In A Forage System With Spayed Heifers, Kari L. Gillespie, Terry J. Klopfenstein, James C. Macdonald Donald, Brandon L. Nuttelman, Cody J. Schneider, Galen Erickson, J. D. Volesky
Nebraska Beef Cattle Reports
In a two-year study, spayed heifer calves were backgrounded on cornstalks with 2 lb or 5 lb wet distillers grains with solubles supplemented daily. During the summer, heifers grazed native range and received no summer supplementation or were supplemented with modified distillers grains with solubles at 0.6% BW daily. Heifers were finished on a common regimen, and an economic scenario was applied to each phase of production and overall. Supplementing more in winter increased profit, but summer supplementation did not impact overall profitability. Numerically, heifers not supplemented during the summer were more profitable than supplemented heifers.
Distillers Grains Supplementation In A Forage System With Spayed Heifers, Kari L. Gillespie, Terry J. Klopfenstein, James C. Macdonald Donald, Brandon L. Nuttelman, Cody J. Schneider, Jerry D. Volesky, Galen Erickson
Distillers Grains Supplementation In A Forage System With Spayed Heifers, Kari L. Gillespie, Terry J. Klopfenstein, James C. Macdonald Donald, Brandon L. Nuttelman, Cody J. Schneider, Jerry D. Volesky, Galen Erickson
Nebraska Beef Cattle Reports
Spayed heifers were developed into yearlings by grazing corn residue and bromegrass, followed by native range, and were finished on a common diet. Treatments were 2 lb or 5 lb of wet distillers grains with solubles (WDGS; DM basis) supplement on corn residue daily, and modified distillers grains with solubles (MDGS) fed at 0.6% BW daily or no MDGS during summer grazing. Feeding 5 lb increased winter ADG by 0.68 lb (year 1) or 0.40 lb (year 2) compared to 2 lb, and increased HCW after finishing. Summer supplementation increased summer ADG by 0.50 lb (year 1) or 0. 44 …