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Super-Dosed Phytase Improves Rate And Efficiency Of Gain In Nursery Pigs, John F. Patience, Stacie A. Gould, Dean Koehler, Brian Corrigan, Amanda Elsbernd, Cassie L. Holloway Jan 2015

Super-Dosed Phytase Improves Rate And Efficiency Of Gain In Nursery Pigs, John F. Patience, Stacie A. Gould, Dean Koehler, Brian Corrigan, Amanda Elsbernd, Cassie L. Holloway

Animal Industry Report

The performance and growth of four hundred forty newly weaned nursery pigs were observed over a 35-day trial at the Iowa State University Swine Nutrition Farm. Pigs were allotted to one of four treatments: an NRC derived positive control [PC], a negative control with 10% lower SID lysine with relative lowering of all other essential amino acids and 1% reduced fat [NC], and two phytase levels: 0 vs 2,500 FTU Quantum Blue, with the 2,500 FTU being considered ‘super-dosed’. Pigs started with an average initial body weight of 6.27 ± 0.01 kg., and received feed and water ...


A Comparison Of The Genetic Factors Influencing Host Response To Infection With One Of Two Isolates Of Porcine Reproductive And Respiratory Syndrome Virus, Andrew S. Hess, Nicholas Boddicker, Bob Rowland, Joan Lunney, Graham Plastow, Jack C. M. Dekkers Jan 2015

A Comparison Of The Genetic Factors Influencing Host Response To Infection With One Of Two Isolates Of Porcine Reproductive And Respiratory Syndrome Virus, Andrew S. Hess, Nicholas Boddicker, Bob Rowland, Joan Lunney, Graham Plastow, Jack C. M. Dekkers

Animal Industry Report

Host genetic differences in viral load (VL) and weight gain (WG) during porcine reproductive and respiratory syndrome virus (PRRSV) challenge were assessed for thirteen trials of ~200 commercial crossbred piglets each, from several different commercial suppliers. Piglets were experimentally infected with PRRSV isolates NVSL-97-7895 (NVSL) or KS-2006-72109 (KS06). VL and WG were moderately heritable and were antagonistically related for both virus isolates. The genetic correlation of host response to NVSL with host response to KS06 was high for both VL and WG. Consistent with previous findings, animals that were heterozygous (AB) for the WUR10000125 (WUR) marker on Chromosome 4 (SSC4 ...


Genome-Wide Association Study Of Birth And Weaning Weights In Brangus Beef Cattle, Ziqing Weng, Hailin Su, Jungjae Lee, Dorian J. Garrick Jan 2015

Genome-Wide Association Study Of Birth And Weaning Weights In Brangus Beef Cattle, Ziqing Weng, Hailin Su, Jungjae Lee, Dorian J. Garrick

Animal Industry Report

The objective of this study was to map quantitative trait loci (QTL) associated with birth weight and weaning weight in Brangus beef cattle. A total of 6 significant QTL over 4 chromosomes were identified. Two QTL were common to both traits. The genome-wide association study (GWAS) results could help us understand the biological process of growth in Brangus. Further analyses are needed to find and validate the casual mutations responsible for these QTL.


Snp Discovery And Genomic Architecture Of Highly Inbred Leghorn And Fayoumi Chicken Breeds Using Whole Genome Resequencing, Damarius S. Fleming, James E. Koltes, Eric R. Fritz-Waters, James M. Reecy, Susan J. Lamont Jan 2015

Snp Discovery And Genomic Architecture Of Highly Inbred Leghorn And Fayoumi Chicken Breeds Using Whole Genome Resequencing, Damarius S. Fleming, James E. Koltes, Eric R. Fritz-Waters, James M. Reecy, Susan J. Lamont

Animal Industry Report

Advances in the use of next generation sequencing (NGS) and ability to pool individuals into groups that represent distinct livestock populations has made it possible to examine trait differences between breeds of chicken. The breeds examined are very divergent when compared on their history of laying ability and immune response. The long-term objective is to understand the genetic differences between the Leghorn and Fayoumi breeds for use in developing more productive and disease resistant chickens. Statistical testing of the sequence of the two breeds along with Gene set enrichment analysis (GSEA) to make connections between the genetic variation seen in ...


Genome-Wide Association Analyses Of Biological Responses To Heat Stress In Pigs, Kwan-Suk Kim, Eui-Soo Kim, Jacob T. Seibert, Aileen F. Keating, Lance H. Baumgard, Jason W. Ross, Max F. Rothschild Jan 2015

Genome-Wide Association Analyses Of Biological Responses To Heat Stress In Pigs, Kwan-Suk Kim, Eui-Soo Kim, Jacob T. Seibert, Aileen F. Keating, Lance H. Baumgard, Jason W. Ross, Max F. Rothschild

Animal Industry Report

With genetic selection for rapid, lean tissue accretion, pigs are becoming increasingly sensitive to heat stress (HS) due to their physiological limitations such as the lack of functional sweat glands to effectively dissipate heat. Increased respiration rate and reduced feed intake are immediate and conserved biological responses to HS in pigs and other livestock species. Genetic differences in how animals respond to high ambient temperatures have been previously reported, but genetic factors contributing to the response variability remain ill-defined. In this study, porcine high density single nucleotide polymorphism (SNP) beadchips were used to genotype 236 female pigs who had been ...


Neonatal Calf Umbilical Cord Healing And Infection Rates After Treatment With Four Different Antiseptics, Amanda L. Robinson, Leo L. Timms, Kenneth J. Stalder, Howard D. Tyler Jan 2015

Neonatal Calf Umbilical Cord Healing And Infection Rates After Treatment With Four Different Antiseptics, Amanda L. Robinson, Leo L. Timms, Kenneth J. Stalder, Howard D. Tyler

Animal Industry Report

Federal regulations regarding the sale and storage of 7% iodine solutions have increased the interest in exploring the effectiveness of alternative antiseptics for umbilical cord dipping. There are few studies documenting the effectiveness of alternative umbilical antiseptics. Four antiseptic solutions (7% iodine-, 4% chlorhexidine-, citrate-methylene blue-parabens (Zuralac), and 1000 ppm chlorine-based products) were compared to determine their impact on umbilical healing and 24-h infection rates in a field trial with dairy calves. There were no differences between treatments, suggesting all four dips tested were effective in preventing umbilical infections and permitting healing of the umbilical cord when used within 30 ...


Update From The Animal Science Undergraduate Teaching Section—2014, Jodi A. Sterle Jan 2015

Update From The Animal Science Undergraduate Teaching Section—2014, Jodi A. Sterle

Animal Industry Report

Undergraduate student enrollment in the Animal Science department continues to increase. A total of 1,077 undergraduate students set another new record this fall. Placement numbers also remain high, with over 97% of graduates either entering graduate or professional school or gaining employment within six months of graduation.


June Dairy Month Open Houses: Learning Events To Improve Consumer Understanding Of Modern Animal Agriculture, Leo L. Timms, Jennifer A. Bentley, Megan Kregel Jan 2015

June Dairy Month Open Houses: Learning Events To Improve Consumer Understanding Of Modern Animal Agriculture, Leo L. Timms, Jennifer A. Bentley, Megan Kregel

Animal Industry Report

Three dairy open houses as part of June Dairy Month events were conducted to provide the public the opportunity to experience and learn first-hand about the efforts made daily on modern dairies to achieve cow care, cow comfort and health, hygienic milking procedures, local cropping systems that provide quality feed for the dairy herd, manure management and land stewardship, respect for family and non-family workers, and overall quality and safety of milk and dairy products. These events were a product of industry partnerships. The three events reached 4800+ participants. Surveys performed at two events showed many participants had trust in ...


Rooster’S Genetic Response To Immune Stimulation, Melissa S. Herrmann, Michael G. Kaiser, Susan J. Lamont Jan 2015

Rooster’S Genetic Response To Immune Stimulation, Melissa S. Herrmann, Michael G. Kaiser, Susan J. Lamont

Animal Industry Report

Lipopolysaccharide (LPS), commonly used to mimic bacterial infection without using live bacteria, was injected into roosters from three genetically diverse lines and gene expression was measured at two time points post-injection. TLR4, MD-2, and MyD88 are three genes that are responsible for initiating the major immune pathway that responds to LPS. Results showed significant differences in gene expression at different times post-stimulation for both MyD88 and TLR4. The three chicken lines had different expression levels of TLR4 in response to LPS. This shows that there are genetic differences in this immune pathway. Further studies are needed, but it may be ...


Separation Of Ovotransferrin From Chicken Egg White Without Using Organic Solvents, Sandun Abeyrathne, Hyunyong Lee, Dong U. Ahn Jan 2015

Separation Of Ovotransferrin From Chicken Egg White Without Using Organic Solvents, Sandun Abeyrathne, Hyunyong Lee, Dong U. Ahn

Animal Industry Report

Ovotransferrin from chicken egg white was separated without using organic solvents. Egg white was diluted with 1 vol. of distilled water (DW), and then homogenized. After removing ovomucin by centrifugation after adjusting the pH to 4.5-5.0, the resulting supernatant was added with ammonium sulfate and citric acid, and then centrifuged after holding overnight at 4 oC. The precipitant, which contains ovotransferrin, was dissolved in DW and the ovotransferrin was re-precipitated using ammonium sulfate and citric acid. The precipitant collected after centrifugation was dissolved with DW, and then desalted and concentrated. The purity of ovotransferrin was determined, the protein ...


Breed Differences In Physiologic Response To Embryonic Thermal Conditioning And Post-Hatch Heat Stress In Chickens, Susan J. Lamont, Michael G. Kaiser, Max F. Rothschild, Michael E. Persia, Chris Ashwell, Carl Schmidt Jan 2015

Breed Differences In Physiologic Response To Embryonic Thermal Conditioning And Post-Hatch Heat Stress In Chickens, Susan J. Lamont, Michael G. Kaiser, Max F. Rothschild, Michael E. Persia, Chris Ashwell, Carl Schmidt

Animal Industry Report

The long range global forecast is for greater numbers of chickens being reared in extreme heat conditions; thus, genetic stocks will need to be selected for performance in warmer production environments. Eggs from three genetic lines were either incubated by conventional “normal” or thermal conditioning (elevated) and the hatched chickens were reared in either normal temperature or heat-stressed environments. Biological and genetic data were collected to identify biomarkers that could be used for genetic selection. The differences observed among lines indicate that a portion of heat tolerance is related to genetics. This study also demonstrates that elevated embryonic incubation alters ...


Effects Of Increased Inclusion Of Algae Meal On Lamb Total Tract Digestibility, Rebecca S. Stokes, Megan L. Van Emon, Daniel D. Loy, Stephanie L. Hansen Jan 2015

Effects Of Increased Inclusion Of Algae Meal On Lamb Total Tract Digestibility, Rebecca S. Stokes, Megan L. Van Emon, Daniel D. Loy, Stephanie L. Hansen

Animal Industry Report

Algae meal is a novel coproduct created by the unique combination of soybean hulls and oil-extracted heterotrophic micro algae. Algae meal is highly digestible by ruminants and was readily consumed by lambs when included at up to 60% of the diet dry matter. This suggests that algae meal could potentially replace corn or soybean hulls and serve as a valuable component of feedlot diets.


Chicken Immune-Related Gene Expression After Stimulation With Bacterial Component, Zachary C. Sauer, Michael G. Kaiser, Susan J. Lamont Jan 2015

Chicken Immune-Related Gene Expression After Stimulation With Bacterial Component, Zachary C. Sauer, Michael G. Kaiser, Susan J. Lamont

Animal Industry Report

The RNA expression levels of Caspase 1 and Interleukin 18 were quantified after a lipopolysaccharide (LPS) challenge. The proteins of these two genes are specifically involved with the inflammatory immunological response pathway of the chicken. Collectively, a greater understanding of RNA expression levels of immunologically related genes in the chicken genome under challenging situations could lead to increased effectiveness of future genetic selection and targeted therapeutics against prevalent diseases in the poultry industry. Results demonstrated the effectiveness of the LPS stimulation, and variation in expression among genetic lines.


Differentially Expressed Genes In Blood From Young Pigs Between Two Swine Lines Divergently Selected For Feed Efficiency: Potential Biomarkers For Improving Feed Efficiency, Haibo Liu, Yet T. Nguyen, Daniel S. Nettleton, Jack C. M. Dekkers, Christopher K. Tuggle Jan 2015

Differentially Expressed Genes In Blood From Young Pigs Between Two Swine Lines Divergently Selected For Feed Efficiency: Potential Biomarkers For Improving Feed Efficiency, Haibo Liu, Yet T. Nguyen, Daniel S. Nettleton, Jack C. M. Dekkers, Christopher K. Tuggle

Animal Industry Report

The goal of this study was to find potential gene expression biomarkers in blood of piglets that can be used to predict pigs’ future feed efficiency. Using RNA-seq technology, we found 453 genes were differentially expressed (false discovery rate (FDR) ≤ 0.05) in the blood of two Yorkshire lines of pigs divergently selected for feed efficiency (FE) based on residual feed intake (RFI). Genes involved in several biosynthetic processes were overrepresented among genes more highly expressed in the low RFI line compared to the high RFI line. Weighted gene co-expression network analysis (WGCNA) also revealed genes involved in some of ...


Distance Of Nursery Pig Snout And Tails From A Human Observer During An Approachability Test, Shawna Weimar, Anna K. Johnson, Kenneth J. Stalder, Locke A. Karriker, Thomas Fangman Jan 2015

Distance Of Nursery Pig Snout And Tails From A Human Observer During An Approachability Test, Shawna Weimar, Anna K. Johnson, Kenneth J. Stalder, Locke A. Karriker, Thomas Fangman

Animal Industry Report

The objective of this experiment was to determine the distance of nursery pigs snout and tails from a human observer when classified as touched, orientated to the human or s not-orientated during a human-animal interaction test using a digital image collection methodology. A complete randomized experimental design was utilized in this study where the pen of pigs was the experimental unit. Two methods, a human observer and a digital image, were assigned within rooms to all pens. Two treatments were compared for snout and tail distance (n = 27). There was a difference in proximity between the observer’s index finger ...


Prediction Of Loin, Belly And Jowl Iv Based On Diet Composition Verses Daily Fatty Acid Intake, Trey A. Kellner, Kenneth J. Prusa, John F. Patience Jan 2015

Prediction Of Loin, Belly And Jowl Iv Based On Diet Composition Verses Daily Fatty Acid Intake, Trey A. Kellner, Kenneth J. Prusa, John F. Patience

Animal Industry Report

Iodine value product (IVP) is commonly used to predict carcass fat iodine value (CIV). However, when higher fat diets are employed, IVP tends to emphasize the quantity of fat in the diet more than the composition of that fat. The objective of this experiment was to compare the effectiveness in predicting CIV by IVP versus individual fatty acid content in the diet or their daily intake. Forty-two gilts and 21 barrows (PIC 337 × C22/29) with an average initial weight of 77.8 ± 0.38 kg were allotted based on sex and weight across 7 treatments: a control diet with ...


Icetag™ Devices: Feasibility For Measuring Activity And Postures In Gilts, Rebecca L. Parsons, Suzanne T. Millman, Anna K. Johnson Jan 2015

Icetag™ Devices: Feasibility For Measuring Activity And Postures In Gilts, Rebecca L. Parsons, Suzanne T. Millman, Anna K. Johnson

Animal Industry Report

The objectives of this project were 1) explore the feasibility of securing the IceTag™ device on sexually mature gilts, 2) determine effects of IceTag™ device on gilt behavior, and 3) compare IceTag™ data from gilts against the gold standard-behavioral data manually collected by a trained observer. Four individually housed bred gilts (~200kg) were used. The treatments were as follows: Gilt 1 – both hind legs; Gilt 2 – right hind leg; Gilt 3 – both hind legs; Gilt 4 – left hind leg. Gilts were monitored at least twice daily for signs of inflammation, lameness and lesion development. Behavioral and postural data were collected ...


Barrow And Gilt Vocalizations During A Human Approach Test, Sarah J. Myers, Jessica D. Colpoys, Johanna Sholar, Nicholas K. Gabler, Suzanne T. Millman, Anna K. Johnson Jan 2015

Barrow And Gilt Vocalizations During A Human Approach Test, Sarah J. Myers, Jessica D. Colpoys, Johanna Sholar, Nicholas K. Gabler, Suzanne T. Millman, Anna K. Johnson

Animal Industry Report

The objective of this study was to investigate differences between barrow and gilt vocalizations during a fear test. Twenty barrows and 20 gilts were tested over two consecutive weeks between 1300 and 1900 hours using a human approach test (HAT). Throughout the test, vocalizations were recorded. Gilts expressed a greater number of low calls compared to barrows; however, barrows expressed a greater number of high calls compared to gilts. Further research should be done to better understand vocalization differences between barrows and gilts during a HAT.


Response Rate And Stakeholder Attitude Towards Use Of Interactive Electronic Audience Response (Clickers) In Beef Extension Programming, Patrick J. Gunn, Daniel D. Loy, Grant A. Dewell, Christopher A. Clark, Beth E. Doran, Russell M. Euken, Denise L. Schwab, Joe Sellers, Patrick B. Wall Jan 2015

Response Rate And Stakeholder Attitude Towards Use Of Interactive Electronic Audience Response (Clickers) In Beef Extension Programming, Patrick J. Gunn, Daniel D. Loy, Grant A. Dewell, Christopher A. Clark, Beth E. Doran, Russell M. Euken, Denise L. Schwab, Joe Sellers, Patrick B. Wall

Animal Industry Report

Effectively measuring short-term impact, particularly a change in knowledge resulting from extension programming can prove to be challenging. Clicker-based technology, when used properly, is one alternative that may allow educators to better evaluate this aspect of the logic model. While the potential interface between clicker technology and extension programming has been regularly hypothesized about, the success of use and stakeholder attitude towards such technology in an extension setting has not been well defined to date. Based on data collected during Iowa Beef Center winter extension programming, clicker-based technology yielded increased participant response rates when compared to hand-written program evaluations. Moreover ...


Efficacy Of The 5 Day Co-Synch Estrous Synchronization Protocol With Or Without The Inclusion Of A Controlled Internal Drug Release Device In Beef Cows, Patrick J. Gunn, Ron Lemenager, Allen Bridges Jan 2015

Efficacy Of The 5 Day Co-Synch Estrous Synchronization Protocol With Or Without The Inclusion Of A Controlled Internal Drug Release Device In Beef Cows, Patrick J. Gunn, Ron Lemenager, Allen Bridges

Animal Industry Report

To increase utilization of artificial insemination by beef producers, estrous and ovulation synchronization protocols must be re-evaluated in an attempt to reduce labor, cost, number of handlings, or a combination thereof without negatively impacting pregnancy rates. One potential way to reduce cost in these systems is through the strategic removal of hormones, such as the controlled internal drug release device (CIDR), from the protocol. While this concept has been tested in a 7 day synchronization protocol, it has not been evaluated in the newer 5 day synchronization protocols. The objective of this study was to compare TAI and overall breeding ...


Comparison Of Untreated Mature Switchgrass And Cornstalks As Roughage In Beef Cattle Feedlot Diets, Christopher A. Clark, Garland R. Dahlke, Dallas L. Maxwell, Stephanie K. Clark, Megan Van Emon, Daniel D. Loy, Stephanie L. Hansen Jan 2015

Comparison Of Untreated Mature Switchgrass And Cornstalks As Roughage In Beef Cattle Feedlot Diets, Christopher A. Clark, Garland R. Dahlke, Dallas L. Maxwell, Stephanie K. Clark, Megan Van Emon, Daniel D. Loy, Stephanie L. Hansen

Animal Industry Report

A feeding trial using 121 crossbred steers was conducted to evaluate the utilization of untreated mature switchgrass as a roughage source in feedlot diets. Steers were fed either cornstalks (STALK) or switchgrass (SWITCH) as roughage at 14.2% of diet DM. Performance and carcass characteristics were evaluated relative to roughage source. Cattle fed SWITCH had lesser marbling scores but backfat, HCW, KPH, ribeye area, and yield grade did not differ between treatments. Cattle fed SWITCH had lesser DMI than did STALK cattle but carcass-adjusted ADG and G:F did not differ between treatments. Untreated switchgrass may replace cornstalks at low ...


Influence Of Corn Particle Size On Steer Performance And Carcass Characteristics When Fed Diets With Moderate Inclusions Of Wet Distillers Grains Plus Solubles, Erika L. Lundy, Beth E. Doran, Evan Vermeer, Daniel D. Loy, Stephanie L. Hansen Jan 2015

Influence Of Corn Particle Size On Steer Performance And Carcass Characteristics When Fed Diets With Moderate Inclusions Of Wet Distillers Grains Plus Solubles, Erika L. Lundy, Beth E. Doran, Evan Vermeer, Daniel D. Loy, Stephanie L. Hansen

Animal Industry Report

A large pen study was conducted with a commercial feedlot to investigate the influence of corn particle size on performance of steers fed diets containing 35% (DM basis) wet distillers grains plus solubles (WDGS). Feedlot cattle in the Midwest are often fed distillers grains from ethanol production that are low in starch. Therefore, this study was designed to evaluate a practical question asked by producers if feeding moderate levels of WDGS would reduce the acidosis risk and allow fine grinding of corn to improve cattle performance. While fine grinding of corn did not improve performance compared to cattle fed a ...


Evaluation Of Novel Glycolic Acid Barrier Teat Dips Post Milking Compared To A Commercial Control Barrier Dip On Teat Health And Condition During Winter, Melanie Matti, Leo L. Timms Jan 2015

Evaluation Of Novel Glycolic Acid Barrier Teat Dips Post Milking Compared To A Commercial Control Barrier Dip On Teat Health And Condition During Winter, Melanie Matti, Leo L. Timms

Animal Industry Report

This trial was designed to compare the teat conditioning properties of 4 experimental glycolic acid teat dip formulas over a period of 4-8 weeks, against a chlorine dioxide commercial formula. An 8 week trial was conducted at the ISU dairy to evaluate the teat conditioning efficacy of experimental formulas vs. Vanquish Barrier under winter conditions. Teat skin and teat end roughness was scored at each teat every 3d. Initially, 4 experimental formulas were tested for 3 weeks in trial. After that, 2 of those formulas were selected for continuation of the 8 week study period. Results showed that teat skin ...


Effects Of Increasing Concentrations Of Corn Distiller’S Dried Grains With Solubles On Chemical Composition And Nutrients Content Of Egg, Hongy Sun, Eun Joo Lee, Michael E. Persia, Dong U. Ahn Jan 2015

Effects Of Increasing Concentrations Of Corn Distiller’S Dried Grains With Solubles On Chemical Composition And Nutrients Content Of Egg, Hongy Sun, Eun Joo Lee, Michael E. Persia, Dong U. Ahn

Animal Industry Report

Four diets were formulated to contain 0, 17, 35 or 50% corn DDGS. A total of 240 54-week-old single-comb White Leghorn laying hens were assigned to one of four dietary treatments and fed for a 24-week experimental period. Two sets of the experimental diets were formulated and each diet was fed for 12 weeks. Chemical composition and nutritional components in egg yolk were measured. Egg yolk from hens fed DDGS-containing diet tended to have higher fat content and lower protein content. Total polyunsaturated fatty acids were significantly increased by DDGS diet. The contents of choline and cholesterol were initially higher ...


Influence Of Distillers Grains From A Cellulosic Ethanol Process Utilizing Corn Kernel Fiber On Nutrient Digestibility Of Lambs And Steer Feedlot Performance, Erika L. Lundy, Daniel D. Loy, Stephanie L. Hansen Jan 2015

Influence Of Distillers Grains From A Cellulosic Ethanol Process Utilizing Corn Kernel Fiber On Nutrient Digestibility Of Lambs And Steer Feedlot Performance, Erika L. Lundy, Daniel D. Loy, Stephanie L. Hansen

Animal Industry Report

Two experiments were designed to evaluate the impact of traditional wet distillers grains (T-WDG) compared to wet distillers grains derived from a novel process for conversion of corn kernel fiber into cellulosic ethanol (C-WDG) on nutrient digestibility and animal performance. Experiment 1 utilized 10 wethers in a replicated 5 × 5 Latin square design to evaluate the digestibility of dry matter, fiber, fat, and crude protein in diets containing T-WDG or C-WDG. In experiment 2, 168 crossbred steers were used in a randomized complete block design to determine the impact of T-WDG or C-WDG in finishing diets on performance and carcass ...


Identifying Molecular Differences In Pigs With Extreme Phenotypes For Weight Gain And Viral Load In Response To Prrs, Martine Schroyen, Juan Pedro Steibel, Igseo Choi, James E. Koltes, Christopher J. Eisley, Eric R. Fritz-Waters, James M. Reecy, Jack C. M. Dekkers, Bob R. R. Rowland, Joan K. Lunney, Catherine W. Ernst, Christopher K. Tuggle Jan 2015

Identifying Molecular Differences In Pigs With Extreme Phenotypes For Weight Gain And Viral Load In Response To Prrs, Martine Schroyen, Juan Pedro Steibel, Igseo Choi, James E. Koltes, Christopher J. Eisley, Eric R. Fritz-Waters, James M. Reecy, Jack C. M. Dekkers, Bob R. R. Rowland, Joan K. Lunney, Catherine W. Ernst, Christopher K. Tuggle

Animal Industry Report

Blood transcriptome analyses in the early phase after infection with the Porcine Reproductive and Respiratory Syndrome virus (PRRSv) revealed differential gene expression patterns and regulatory networks between pigs with extreme phenotypes for weight gain and viral load. Understanding these differences could lead to identifying biomarkers that would predict which pigs would be more resistant to PRRS.


Effects Of Blast Chilling On Fresh Pork Quality In Cuts From The Psoas Major, Semimembranosus, And Triceps Brachii, Aaron M. Blakely, Edward M. Steadham, Kenneth J. Prusa, Christine A. Fedler, Elisabeth J. Huff-Lonergan, Steven M. Lonergan Jan 2015

Effects Of Blast Chilling On Fresh Pork Quality In Cuts From The Psoas Major, Semimembranosus, And Triceps Brachii, Aaron M. Blakely, Edward M. Steadham, Kenneth J. Prusa, Christine A. Fedler, Elisabeth J. Huff-Lonergan, Steven M. Lonergan

Animal Industry Report

Carcasses (n=40) with defined fat free lean and carcass weight were selected 45 minutes postmortem. Carcasses were split and sides subjected to conventional chill (CC) or blast chilling (BC) regimens. The Psoas Major (PM) from BC sides had increased purge loss, but was juicier, more tender and less chewy than the PM from CC sides. The Semimembranosus (SM) from BC sides had higher 30 hour pH, darker color scores, and had a lower Hunter a value than the SM from CC sides. No treatment effect was found in the Triceps Brachii.


Development Of Protein Biomarker Identification Protocols, Kyle Grubbs, Christopher K. Tuggle, Jack C. M. Dekkers, Yet T. Nguyen, Elisabeth J. Huff-Lonergan, Daniel S. Nettleton, Steven M. Lonergan Jan 2015

Development Of Protein Biomarker Identification Protocols, Kyle Grubbs, Christopher K. Tuggle, Jack C. M. Dekkers, Yet T. Nguyen, Elisabeth J. Huff-Lonergan, Daniel S. Nettleton, Steven M. Lonergan

Animal Industry Report

Protein biomarkers can be used to predict biological traits or diseases. There is a need for robust methods to identify protein biomarkers that are linked to livestock production traits. Serum from blood is often used for detecting and screening for biomarkers. Albumin is a protein that comprises 50% or more of the total content of serum, and has historically been removed from serum before biomarker development and testing. We have shown that it is possible to successfully identify potential biomarkers without albumin removal, thus reducing steps and potentially cost in both development and routine testing phases.


Relationship Of Fat Quality And Meat Quality Traits Of Fresh Pork, Eric D. Testroet, Chad L. Yoder, Amber L. Testroet, Carmen J. Reynolds, Matthew O'Neil, Soi Meng Lei, Donald C. Beitz, Thomas J. Baas Jan 2015

Relationship Of Fat Quality And Meat Quality Traits Of Fresh Pork, Eric D. Testroet, Chad L. Yoder, Amber L. Testroet, Carmen J. Reynolds, Matthew O'Neil, Soi Meng Lei, Donald C. Beitz, Thomas J. Baas

Animal Industry Report

Barrows and gilts (n=347) of 5 purebred lines and one commercial crossbred line were fed commercial swine diets with dried distillers grains with solubles (DDGS) inclusion at 30% of dry matter. For the final 30 days of feeding, DDGS were removed from the diet. Pigs were harvested at a minimal weight of 111.4 kg. At harvest, fat was collected from the back, belly, and jowl, and meat samples were taken from the longissimus muscle for evaluation of fat and meat quality characteristics. Jowl fat iodine values were significant predictors of back and belly fat iodine values, and increases ...


Effect Of Calcium Hydroxide Treatment On Switch Grass, Garland R. Dahlke, Daniel D. Loy, Stephanie L. Hansen, Stephanie Clark, Megan Van Emon, Christopher A. Clark Jan 2015

Effect Of Calcium Hydroxide Treatment On Switch Grass, Garland R. Dahlke, Daniel D. Loy, Stephanie L. Hansen, Stephanie Clark, Megan Van Emon, Christopher A. Clark

Animal Industry Report

Fully mature switch grass responds favorably in terms of rumen digestibility to an alkali treatment of calcium hydroxide.