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Animal Science

Animal Industry Report

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Genetic Markers Found For Response To Heat Stress In Chickens, Angelica G. Bjorkquist, Max F. Rothschild, Michael E. Persia, Chris Ashwell, Carl Schmidt, Susan J. Lamont Jan 2015

Genetic Markers Found For Response To Heat Stress In Chickens, Angelica G. Bjorkquist, Max F. Rothschild, Michael E. Persia, Chris Ashwell, Carl Schmidt, Susan J. Lamont

Animal Industry Report

A unique line of chickens was evaluated for response to heat stress. We measured body temperature, body weight, breast yield, and digestibility. Genomic (DNA) markers were identified by genotyping on the Affymetric 600K array. We conclude that the traits measured during heat stress do have a genetic component. Genomic markers for the response to heat stress have been identified and may be used for breeding more resilient animals.


Accuracy Of Genomic Prediction For Prrs Antibody Response, Nick V. L. Serão, Bob Kemp, Benny Mote, Philip Willson, John Harding, Steve Bishop, Graham Plastow, Jack C. M. Dekkers Jan 2015

Accuracy Of Genomic Prediction For Prrs Antibody Response, Nick V. L. Serão, Bob Kemp, Benny Mote, Philip Willson, John Harding, Steve Bishop, Graham Plastow, Jack C. M. Dekkers

Animal Industry Report

The accuracy of genomic prediction for antibody response to Porcine Reproductive and Respiratory Syndrome (PRRS), measured as S/P ratio, was evaluated using two independent datasets of Landrace x Large White females. Results demonstrate that antibody response during a PRRS outbreak can be predicted with high accuracy using genetic markers in two regions on chromosome 7. One of these regions includes the Major Histocompatibility Complex. The high accuracy for this region indicates that marker effects are consistent across Landrace x Large White populations.


Sequencing A Shrimp Diversity Panel, Emily Kawaler, Max F. Rothschild, Zhiqiang Du Jan 2015

Sequencing A Shrimp Diversity Panel, Emily Kawaler, Max F. Rothschild, Zhiqiang Du

Animal Industry Report

Eighty-six shrimp (eighty Pacific White, six Tiger shrimp) from ten different geographic regions were sequenced with a twofold goal: first, to better understand and document the genetic makeup of the species, and second, to discover genetic differences between shrimp lines that may facilitate the breeding of shrimp with better performance traits


Development And Use Of A Survey Tool To Determine The Efficacy Of Livestock Truck Washes In Iowa, Amber M. Danielson, Anna K. Johnson, Kenneth J. Stalder, Rodney B. Baker, Troy Bigelow, Daniel S. Andersen Jan 2015

Development And Use Of A Survey Tool To Determine The Efficacy Of Livestock Truck Washes In Iowa, Amber M. Danielson, Anna K. Johnson, Kenneth J. Stalder, Rodney B. Baker, Troy Bigelow, Daniel S. Andersen

Animal Industry Report

The transmission of disease among livestock farms could be addressed by the efficiency of truck washes to clean and disinfect trailers used for transporting animals. Collecting swab samples from trailers and cabs of identified truck wash trailers will help to determine the proper procedures and steps needed to reduce the transmission of disease. Truck washes in the state of Iowa were identified and invited to participate in a questionnaire that will provide helpful information for this research. The main goals of this study are to 1) determine the areas in the truck washing process that pose a high risk to ...


Evaluation Of Teat Coverage Persistency And Teat Health For Three Dry Period Persistent Barrier Teat Sealant Dips, Melanie Matti, Alislinn A. Pomfret, Leo L. Timms Jan 2015

Evaluation Of Teat Coverage Persistency And Teat Health For Three Dry Period Persistent Barrier Teat Sealant Dips, Melanie Matti, Alislinn A. Pomfret, Leo L. Timms

Animal Industry Report

Mastitis research has shown that 40-50% of intramammary infections (IMI) are contracted during the dry or non-lactating period with the greatest percentages of these occurring during the first and last two weeks of the dry period. The ability to develop and apply external persistent barrier teat dip products (like a liquid bandage) that can persist for these 1 week periods could decrease IMI, thus improving animal health and performance, and product quality and safety. The objective of this study was to evaluate and compare 3 persistent barrier dry cow teat sealant dips with particular interest and comparisons of dip persistency ...


Estimation Of Haplotype Diversity And Recombination Rate On Chromosomes 5 And 15 In Layer Chickens, Ziqing Weng, Anna Wolc, Jesus Arango, Petek Settar, Janet E. Fulton, Neil P. O'Sullivan, Rohan L. Fernando, Jack C. M. Dekkers, Dorian J. Garrick Jan 2015

Estimation Of Haplotype Diversity And Recombination Rate On Chromosomes 5 And 15 In Layer Chickens, Ziqing Weng, Anna Wolc, Jesus Arango, Petek Settar, Janet E. Fulton, Neil P. O'Sullivan, Rohan L. Fernando, Jack C. M. Dekkers, Dorian J. Garrick

Animal Industry Report

The objectives of this study were to compare the performance of different haplotype reconstruction approaches, characterize haplotype diversity and identify recombination hotspots on chromosomes 5 and 15 in layer chicken. BEAGLE, DAGPHASE, and fastPHASE software recognized fewer haplotypes than two other methods. In total, 10 and 2 recombination hotspots were identified on chromosomes 5 and 15, respectively. Further study is needed to confirm these regions with high recombination rate and high haplotype diversity.


An Experimental Course: Animal Handling, Safety, And Well-Being, Brady M. Mcneil, Heather A. Jennings, Christen G. Jackson, Anna K. Johnson, Jodi A. Sterle Jan 2015

An Experimental Course: Animal Handling, Safety, And Well-Being, Brady M. Mcneil, Heather A. Jennings, Christen G. Jackson, Anna K. Johnson, Jodi A. Sterle

Animal Industry Report

Students in the Department of Animal Science at Iowa State University are coming from increasingly diverse backgrounds, with little to no experience working with or handling various livestock species. In order to best accommodate these students, additional courses are being developed, one of which is Animal Science 190X: Animal Handling, Safety, and Well-Being. Through the course, students handle all major livestock species; sheep, swine, poultry, horses, beef cattle and dairy cattle, and are required to demonstrate handling knowledge and skills learned as part of a final assessment. This creates an opportunity for students lacking a livestock background to feel more ...


Fatty Acid Snp Interaction Analysis In Angus Sired Beef Cattle, Luke M. Kramer, James E. Koltes, Eric R. Fritz-Waters, Mary Sue Mayes, Alysta Markey, Mahdi Saatchi, Nathan T. Weeks, James M. Reecy Jan 2015

Fatty Acid Snp Interaction Analysis In Angus Sired Beef Cattle, Luke M. Kramer, James E. Koltes, Eric R. Fritz-Waters, Mary Sue Mayes, Alysta Markey, Mahdi Saatchi, Nathan T. Weeks, James M. Reecy

Animal Industry Report

The triacylglyceride (TAG) fatty acid content in meat from Angus-sired cattle was analyzed for non-additive genetic effects. A total of 11,482 significant DNA marker interactions (false discovery rate [FDR] < 0.05) were detected across thirty-seven different TAG fatty acids. Interactions were not evenly distributed amongst all fatty acids analyzed, and types of interactions (additive-by-additive, additive-by-dominance, and dominance-by-dominance) varied within each individual fatty acid. These results indicate that it may be possible to account for additional genetic variance amongst TAG fatty acids over and above individual markers.


Effects Of Blast Chilling On Fresh Pork Quality In Chops From The Longissimus Dorsi, 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 Chops From The Longissimus Dorsi, 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 or blast chilling regimens. Sides that were blast chilled had Longissimus dorsi (LD) chops with slower pH decline, greater cook loss and greater Warner-Bratzler Shear force than chops from conventionally chilled sides. These results demonstrate that current blast chilling practices have the potential to negatively impact pork tenderness.


Characterization Of The F94l Double Muscling Mutation In Pure- And Crossbred Limousin Animals, Jungjae Lee, Hailin Su, Rohan L. Fernando, Dorian J. Garrick, Jeremy Taylor Jan 2015

Characterization Of The F94l Double Muscling Mutation In Pure- And Crossbred Limousin Animals, Jungjae Lee, Hailin Su, Rohan L. Fernando, Dorian J. Garrick, Jeremy Taylor

Animal Industry Report

The objective of this study was to investigate the nature of the effect of the F94L variant in the myostatin (MSTN) gene on economic traits in Limousin and Limousin-Angus crossbred animals in the context of genomic analyses using Illumina BovineSNP50 Bead chip genotypes.


Effect Of Estrus Activity When Evaluating Feed Efficiency In Heifers, Garland R. Dahlke, Patrick J. Gunn Jan 2015

Effect Of Estrus Activity When Evaluating Feed Efficiency In Heifers, Garland R. Dahlke, Patrick J. Gunn

Animal Industry Report

Estrus activity in virgin heifers tends to affect the outcome in measurements observed during performance and feed utilization tests. Prior to any testing it is prudent to identify those females that have shown estrus activity consistently and those which have not, then evaluate animals for feed efficiency grouped by stage of sexual maturity.


Effect Of Trace Mineral Injection And Optaflexx On Growth Performance And Carcass Characteristics Of Finishing Cattle, Olivia N. Genther-Schroeder, Christopher A. Clark, Stephanie L. Hansen Jan 2015

Effect Of Trace Mineral Injection And Optaflexx On Growth Performance And Carcass Characteristics Of Finishing Cattle, Olivia N. Genther-Schroeder, Christopher A. Clark, Stephanie L. Hansen

Animal Industry Report

Utilizing a trace mineral (TM) injection approximately 90 d prior to harvest may improve growth performance and carcass characteristics when the β-agonist Optaflexx is not used. This may provide a unique opportunity for TM injection to be used in natural programs, to avoid the use of β-agonists, but still maintain high rates of growth. However, using a TM-injection only 28 d prior to harvest appears to have no additional benefit, and may decrease carcass quality.


Changes In The Protein Profile Of Porcine Liver In Response To Immune System Stimulation, Amanda C. Outhouse, Kyle Grubbs, Christopher K. Tuggle, Jack C. M. Dekkers, Nicholas K. Gabler, Steven M. Lonergan Jan 2015

Changes In The Protein Profile Of Porcine Liver In Response To Immune System Stimulation, Amanda C. Outhouse, Kyle Grubbs, Christopher K. Tuggle, Jack C. M. Dekkers, Nicholas K. Gabler, Steven M. Lonergan

Animal Industry Report

Immune system function has a direct influence on swine growth. Using lipopolysaccharide (LPS) to stimulate the immune system of pigs provides insight on how they handle immunological stress. Several proteins were shown to be part of the liver’s response to LPS. These proteins included heat shock protein (HSP) 60, HSP70, and peroxiredoxin-2. Changes in the abundance of these proteins indicate the extent to which an animal can respond to this immune system stimulation (ISS). Proteins responsible for cellular rescue were found to be increased in abundance in pigs with stimulated immune systems.


Effects Of Label Dose Permethrin Use In Yearling Angus Beef Bulls On Reproductive Function And Testicular Histopathology, Tyler M. Dohlman, Patrick E. Phillips, Darin M. Madson, Christopher A. Clark, Patrick J. Gunn Jan 2015

Effects Of Label Dose Permethrin Use In Yearling Angus Beef Bulls On Reproductive Function And Testicular Histopathology, Tyler M. Dohlman, Patrick E. Phillips, Darin M. Madson, Christopher A. Clark, Patrick J. Gunn

Animal Industry Report

To eliminate the potential for insect borne diseases and improve productivity in cow-calf operations, many producers use pour-on pyrethroids. However, popular press literature has identified potential links between use of pyrethroids and reproductive function failures in bulls. While literature in mice and rats have reported potential endocrine disruption of sex steroids resulting from pyrethroid exposure, effects of pyrethroid use on bull fertility is still questionable. The objective of this study was to measure reproductive parameters in peripubertal Angus bulls using a commonly used pyrethroid pour-on. We hypothesized that use of a pyrethroid pour-on at labeled dose would have limited effects ...


Evaluation Of Teat Coverage Persistency And Teat Health For Four Dry Period Persistent Barrier Teat Sealant Dips, Melanie Matti, Leo L. Timms Jan 2015

Evaluation Of Teat Coverage Persistency And Teat Health For Four Dry Period Persistent Barrier Teat Sealant Dips, Melanie Matti, Leo L. Timms

Animal Industry Report

Mastitis research has shown that 40-50% of intramammary infections (IMI) are contracted during the dry or non-lactating period with the greatest percentages of these occurring during the first and last two weeks of the dry period. The ability to develop and apply external persistent barrier teat dip products (like a liquid bandage) that can persist for these 1 week periods could decrease IMI, thus improving animal health and performance, and product quality and safety. The objective of this study was to evaluate and compare 4 persistent barrier dry cow teat sealant dips with particular interest and comparisons of dip persistency ...


Effects Of Increasing Supplementation Of Rumen Undegradable Protein On Plasma Essential Amino Acid Concentrations In Beef Cows Consuming Low Quality Forage, Taylor C. Geppert, Allison Meyer, Patrick J. Gunn Jan 2015

Effects Of Increasing Supplementation Of Rumen Undegradable Protein On Plasma Essential Amino Acid Concentrations In Beef Cows Consuming Low Quality Forage, Taylor C. Geppert, Allison Meyer, Patrick J. Gunn

Animal Industry Report

The effects of pairing a low quality forage with increasing metabolizable protein (MP) supplementation from a moderately abundant rumen undegradable protein (RUP) source (corn gluten meal; 62% RUP) on essential plasma amino acid (AA) concentrations were evaluated in a 60-day trial. Non-pregnant, non-lactating cows (n=24) were offered ad libitum access to cornstalks and fed 1 of 3 isocaloric diets (0.48 NEm/lb) and supplemented primarily with corn gluten meal to provide 100% MP requirements (CON), 125% MP requirements (MP125), or 150% MP requirements (MP150). It was observed that increasing concentrations of MP in the diet from a moderately ...


Opportunities And Challenges In A Changing Beef Industry: Results Of A Statewide Needs Assessment In Iowa, Patrick J. Gunn, Daniel D. Loy Jan 2015

Opportunities And Challenges In A Changing Beef Industry: Results Of A Statewide Needs Assessment In Iowa, Patrick J. Gunn, Daniel D. Loy

Animal Industry Report

The U.S. beef industry is poised for growth following increased contraction over the past decade that has resulted in the lowest cattle inventory in over 60 years. However, sustainable, long term growth of the industry is dependent upon early identification of issues that may inhibit profitability. A series of seven listening sessions conducted across Iowa in November and December of 2013 by the Iowa Beef Center identified land access, farm transition, production efficiency, marketing, genetics, data management, feedstuffs, and animal health as “mega-issues” facing producers. Specific issues under each of these overarching categories will guide future extension programming efforts ...


Influence Of Feed Efficiency Ranking On Diet Digestibility And Performance Of Beef Steers, Jason R. Russell, Stephanie L. Hansen Jan 2015

Influence Of Feed Efficiency Ranking On Diet Digestibility And Performance Of Beef Steers, Jason R. Russell, Stephanie L. Hansen

Animal Industry Report

The current study evaluated diet digestibility and finishing phase growth performance in steers previously evaluated for feed efficiency during the growing phase. Based on growing phase feed efficiency, steers were classified as highly or lowly feed efficient. During the finishing phase, the highly feed efficient steers remained more feed efficient. Steers were fed either corn or roughage-based diets during the growing phase and then transitioned to either corn or byproduct-based diets during the finishing phase. Dry matter digestibility was strongly positively correlated in steers grown/finished on corn or grown/finished on high fiber diets (roughage, byproduct). Conversely, there was ...


Accuracy Of Genomic Predictions For Birth, Weaning And Yearling Weights In Us Simmental Beef Cattle, Hailin Su, Rohan L. Fernando, Dorian J. Garrick, Bruce Golden Jan 2015

Accuracy Of Genomic Predictions For Birth, Weaning And Yearling Weights In Us Simmental Beef Cattle, Hailin Su, Rohan L. Fernando, Dorian J. Garrick, Bruce Golden

Animal Industry Report

Direct genomic breeding values (DGV) based on actual or imputed GeneSeek Genomic Profiler HD (GGPHD) genotypes were obtained for birth, weaning and yearling weights using Bayesian regression on about 20,000 US Simmental pure- or cross-bred beef cattle. Accuracies of DGV were quantified using 4-fold cross validation. Accuracies expressed as genetic correlations between DGV and trait ranged from 0.61 to 0.65, and the regressions of phenotype on DGV ranged from 0.61 to 0.66. These results indicate good predictive ability of genomic prediction with GGPHD chips but DGV need to be adjusted for bias.


Optimal Dietary Energy And Protein For Gilt Development: Age At Puberty, Ovulation Rate, And Reproductive Tract Traits, Julia A. Calderón Díaz, Jeffrey L. Vallet, Clay Lents, Danny Nonneman, Jeremy Miles, Elaine Wright, Lea Rempel, Robert Cushman, Bradley Freking, Gary Rohrer, Christina Phillips, Ashley Dedecker, George Foxcroft, Kenneth J. Stalder Jan 2015

Optimal Dietary Energy And Protein For Gilt Development: Age At Puberty, Ovulation Rate, And Reproductive Tract Traits, Julia A. Calderón Díaz, Jeffrey L. Vallet, Clay Lents, Danny Nonneman, Jeremy Miles, Elaine Wright, Lea Rempel, Robert Cushman, Bradley Freking, Gary Rohrer, Christina Phillips, Ashley Dedecker, George Foxcroft, Kenneth J. Stalder

Animal Industry Report

The effect of feeding different lysine and metabolizable energy (ME) levels to 1221 crossbred Large White × Landrace developing gilts housed in groups from 100 d of age until slaughter (approximately 260 d of age) on age at puberty and reproductive tract measurements were evaluated. Gilts were randomly allotted to six corn-soybean diets formulated to provide two standardized ileal digestible lysine levels [100% (high, HL) and 85% (low, LL)] and threemetabolizable energy levels [ME, 90% (low, LME), 100% (medium, MME), 110% (high, HME). Average age at puberty was 193 d of age. There were no effects of the dietary treatments on ...


Improved Accuracy Of Genomic Prediction For Traits With Rare Qtl By Fitting Haplotypes, Xiaochen Sun, Rohan L. Fernando, Dorian J. Garrick, Jack C. M. Dekkers Jan 2015

Improved Accuracy Of Genomic Prediction For Traits With Rare Qtl By Fitting Haplotypes, Xiaochen Sun, Rohan L. Fernando, Dorian J. Garrick, Jack C. M. Dekkers

Animal Industry Report

Genomic prediction estimates breeding values by exploiting linkage disequilibrium (LD) between quantitative trait loci (QTL) and single nucleotide polymorphisms (SNPs). High LD cannot occur when QTL and SNPs have different minor allele frequencies (MAF). Marker panels tend to use SNPs with high MAF and will have limited ability to predict rare QTL alleles. In practice, increasing SNP density has not improved prediction accuracy. A possible reason is that many traits are characterized by rare QTL. In that case, linear models fitting haplotypes could have advantage because haplotypes can be in complete LD with QTL alleles. SNP genotypes were simulated to ...


Effect Of Wur Genotype And Prrs Vaccination On Pigs Co-Infected With Prrs And Pcv2b, Jenelle R. Dunkelberger, Nick V. L. Serão, Maureen Kerrigan, Joan Lunney, Bob Rowland, Jack C. M. Dekkers Jan 2015

Effect Of Wur Genotype And Prrs Vaccination On Pigs Co-Infected With Prrs And Pcv2b, Jenelle R. Dunkelberger, Nick V. L. Serão, Maureen Kerrigan, Joan Lunney, Bob Rowland, Jack C. M. Dekkers

Animal Industry Report

Average daily gain (ADG) and viral load (VL) were evaluated for pigs co-infected with porcine reproductive and respiratory syndrome (PRRS) virus (PRRSV) and porcine circovirus type 2b (PCV2b). Pigs were pre-selected for WUR genotype (a marker on chromosome 4 associated with weight gain and VL under PRRSV-challenge), half were vaccinated for PRRS, and half were not. Results indicate that vaccination for PRRS resulted in slower growth prior to co-infection and that the AB WUR genotype was associated with faster growth prior to co-infection, lower PRRS VL, and lower PCV2b VL in vaccinated pigs.


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 ...