bluuebunny/crossref_metadata_2025 huggingface dataset:
PSVII-9 Heterosis Effects on Reproductive Traits in a Multibreed Beef Cattle Herd in Panama
Authors: Murray Roderick Alexander Gonzalez , Thomas Milton G , Enns R Mark , Speidel Scott E
Published: November 2023

The aim of this study was to estimate the influence of heterosis and breed percentage on calving interval (CI) and gestation length (GL), and the correlation between age at first calving (AFC) and CI, in beef cows. Data included 1,291 repeated observations of CI and GL from 502 cows with 2,840 individuals in the pedigree, including 3 generations from the multi-breed herd of the livestock experimental station of the Panama Agricultural Innovation Institute (IDIAP) in Gualaca, Panama. The herd was composed of the following genetic groups based on their breed percentage: tropically adapted Brahman (BR), Nellore (Ne), Undefined Bos indicus (BI), Guaymi Creole (CR), Senepol (SP) and Romosinuano (RS); Bos taurus (BT), Simmental (SM), Angus (A), Red Angus (AR), Limousin (LM), Charolais (CH), Wagyu (Wa), and Others (Oth); crossbreeds (cx), Beefmaster (BF), Three CX (F1 x different BT), R1(Backcross BR), R2 (Backcross BT), Composite (combination of at least 4 different breeds with less than 25% of Zebu), Upgrade (87.5% BR 12.5% BT), B1 (62.5% Zebu + 37.5% BT), and B2 (62.5% BT + 37.5% Zebu). The Zebu influenced breed group represents 50.03% of this population, followed by the F1, the three CX, composites, and R1, representing 22%, 13.89%, 6.11%, and 5.34%, respectively. The other breed groups represented less than 2.5% of the population. A repeated records animal model was used to estimate variance components for both CI and GL. A bivariate animal model was used to estimate the genetic correlation between CI and age at first calving (AFC). Fixed effects for all models consisted of contemporary group, age of dam, calf sex, degree of outcross, and breed percentage. Contemporary group was defined by calving year and season of birth. The average CI was 572.6 ± 140 d, with a range of 315 d to 910 d; and the average GL was 284.2 ± 6.3 d. The estimated regression coefficient for CI on heterosis was -0.114 ± 0.10 d/heterosis % (P = 0.266), and for GL was -0.01 ± 0.052 d/heterosis %. A shorter CI was observed for the F1, and three CX, with 558.7 days and 567.2 days, representing a 2.3% and 1.3% reduction in CI, respectively, when compared with the Zebu group. A larger CI was observed for the Nellore and Romosinuano breeds % with 0.17 ± 1.23 d, (P = 0.373) and 0.64± 0.13 d (P = 0.406), respectively. A low heritability (0.037 ± 0.026) for CI was estimated, with a positive genetic trend over the duration of the study. The analysis between CI and AFC revealed a moderate genetic correlation (0.49 ± 0.36) that allows the establishment of a selection program to improve AFC and CI, which would improve the fertility of this multi-breed herd in Panama.
PSXII-7 Characterization of Runs of Homozygosity Islands in American Mink Using Whole-Genome Sequencing Data
Authors: Davoudi Pourya , Do Duy Ngoc , Colombo Stefanie , Rathgeber Bruce , Sargolzaei Mehdi , Plastow Graham , Wang Zhiquan , Miar Younes
Published: November 2023

The genome-wide analysis of runs of homozygosity (ROH) islands can be an effective strategy to detect the variants shared among the individuals of a population, and thereby to reveal important genomic regions for complex traits. The current study performed ROH analysis to characterize the genome-wide patterns of homozygosity, ROH islands, and the gene content of those candidate regions using whole-genome sequencing data of 100 American mink (Neogale vison). After sequence processing, variants were called using GATK and Samtools pipelines. After quality control, 8,373,854 bi-allelic variants identified by both pipelines remained for subsequent analysis. A total of 34,652 ROH segments were identified in all individuals, among which shorter segments (0.3–1 Mb) were abundant throughout the genome, approximately accounting for 84.39% of all ROH. We identified 63 ROH islands that harbored 156 annotated genes. The genes located in ROH islands were associated with fur quality (EDNRA, FGF2, FOXA2, SLC24A4, SLC24A3, PDE5A), body size/body weight (MYLK4, PRIM2, FABP2, BBS7, EYS, PHF3), immune capacity (IL2, PTP4A1, SEMA4C, CD274, JAK2, MAD2L1, CCNA2, TNIP3), and reproduction (ADAD1, KHDRBS2, INSL6, PGRMC2, LARP1B, HSPA4L, CAMK2D). Furthermore, Gene Ontology and KEGG pathway enrichment analyses revealed multiple significant terms (P ≤ 0.05), among which cGMP-PKG signaling pathway, regulation of actin cytoskeleton, and calcium signaling pathway were highlighted due to their functional roles in growth and fur characteristics. This is the first study to present ROH islands in American mink. The candidate genes from ROH islands and functional enrichment analysis suggest possible signatures of selection in response to the mink breeding targets, such as increased body length, reproductive performance and fur quality. These findings contribute to an understanding of genetic characteristics, and provide complementary information to assist with implementation of breeding strategies for genetic improvement in American mink.
PSIV-30 Exploring the Prebiotic Activities of Proanthocyanidins on a Platform Using the Three-Dimensionally (3D)-Cultured Organoids
Authors: Xi Lin , Wang Feng , Cagle Daisy , Zhu Yue , Odle Jack , Xie Deyu
Published: November 2023

Using antibiotics, the antimicrobial substance active against bacteria and promoting growth efficiency, in feedstuffs and food supply has been attracting great attention due to its side effects and contribution to antibiotic resistance. Therefore, exploring talternatives to antibiotics is of great significance and urgent need for human health and animal industries with a sustainable high efficiency. The objective of this study is to evaluate the biological and medicinal activities of the monomers of proanthocyanidins (PAs), such as epicatechin, epigallocatechin gallate, and flavanols such as quercetin, isoquercetrin, and rutin generated from engineered plants. The evaluations were performed in intestinal organoids isolated from ileum of neonatal piglets. The organoids after expended in vitro were incubated with or without the candidate compounds for 24 hours, and then treated with or without polyinosinic-polycytidylic acid [Poly (I:C), 10 µg/mL] for another 24 hours, a synthetic analog of double-stranded RNA (can induce a molecular pattern associated with viral infections). Cell proliferation, barrier function, toll-like receptor pathway and apoptosis as well as organic cation transporters were assessed by measuring the abundance of the corresponding genes. Concentration gradient (0 to 200 µM) measurements showed that isoquercetrin and epigallocatechin gallate might stimulate the intestinal cell proliferation, promote the uptake of L-carnitine, and increase barrier function and mucin secretion (P < 0.05). Epigallocatechin gallate and epicatechin might affect the inflammation responses via modifying expression of Interleukins but not induce apoptosis. Interactions between the examined these compounds and Poly (I: C) were not observed (P > 0.05), but the influence on the challenged pattern were tested for some of the measured genes (P < 0.05). Based on the data collected from this in vitro study, we conclude that epigallocatechin gallate is a potential PA monomer with all prebiotic characteristics and its applicable values in feedstuff and food supply should be studied in vivo studies in domestic (food) animals with and without antigen challenges. Supported by NC Biotechnology Center project (1107)2022-3082 and the North Carolina Agricultural Research Hatch Projects 02780.
PSIV-28 Evaluation of Possible Interactions Between Platelets and Neutrophil in Cow Blood
Authors: Pande Priyanka , Inupala SreeNavya , Jagana Sowmya , Uzzaman Md. Rasel , Worku Mulumebet
Published: November 2023

Neutrophils have a central role in the inflammatory response and fight infection. Platelets are essential for hemostasis and thrombosis and fighting vascular damage. Studies in man show that the interaction between these cells can modulate their function. We aimed to assess the effect of possible relationships between the platelet count in whole blood on neutrophil activation. Blood samples (50 mL) from five clinically healthy Holstein Friesian cows at the NC A&T Dairy research unit were collected. Differential white blood cell counts were conducted using a VetScan (Zoetis). Neutrophils were isolated through differential centrifugation and hypotonic lysis of red blood cells. Duplicate samples of neutrophils were maintained in phosphate-buffered saline for 30 minutes at 37 °C. The total and viable neutrophil count was evaluated using TC20 (Bio-Rad). Samples were centrifuged. The supernatant was used to determine the concentration of total secreted protein using the Bicinchoninic acid assay (Pierce). Enumeration of bovine blood platelets and white blood cells was accomplished using the Vetscan study found that there was no significant difference observed in the total cell count or percent viability in neutrophils between the five cows (P > 0.05). However, protein concentration showed a significant change between animals. Correlations between total platelet count, neutrophil count, viability, and protein secretion were evaluated. No correlation was found between neutrophil count, protein secretion in isolated neutrophils and concentration of platelets in whole cow blood. The number of circulating platelets was not related to neutrophil viability or protein secretion. This approach can be used in further investigation using imaging and is needed to evaluate the effect and functional consequences of interactions between platelets and neutrophils in cow blood.
PSV-20 The Effect of Bacillus Spp. Supplementation on Performance and Immune Function of Heifers Grazing Tall Fescue Pastures
Authors: Bailey Eric , Ellis Anita , Cappellozza Bruno I , McCorkill Andy , Petzel Emily A , Brake Derek W
Published: November 2023

Probiotics are purported to improve gastrointestinal tract health across a variety of species. Thus, we evaluated the effects of supplementing a blend of Bacillus spp. on performance and immune function in immature beef cattle. Crossbred heifers (n = 192) were stratified by initial body weight (196 ± 15.4 kg) and randomly assigned to 1 of 24 pastures (1.8 ha each) of Kentucky 31 tall fescue. Heifers were offered 2.84 kg daily of a commodity feed blend and the supplement contained either no probiotic (CON) or of Bacillus spp. (BAC). Bacillus spp. was offered at 3 grams per head per day. Heifers were weighed on consecutive days on d 0 and 1, along with d 84 and 85 to establish initial and final body weight. Interim weights were taken every 28 d. A humoral response to chicken egg albumin (OVA) was established following a subcutaneous injection with OVA. To assess heifers’ immune responses, plasma was taken from two heifers per pasture on d 1, 15, 29, 43, and 57. Plasma samples were measured for the presence of anti-OVA IgG, proinflammatory cytokines, anti-inflammatory cytokines, and chemokines. There were no trt*day interactions (P ≥ 0.30) for plasma response variables. Concentrations of pro-inflammatory cytokines IL-1α and IFN-γ decreased (P ≤ 0.01) in heifers supplemented with BAC. The anti-inflammatory cytokine IL-1 F5 decreased (P = 0.02) with BAC supplementation. Chemokines MIG and MIP-1β also decreased (P ≤ 0.03) with BAC supplementation. Heifers fed BAC tended to display (P = 0.09) greater titers of anti-OVA IgG than the control. Body weight and average daily gain did not differ (P ≥ 0.53) throughout the experiment. Under the conditions of this experiment, heifers supplemented with Bacillus spp. demonstrated modulated immune responses.
PSV-18 Host Transcriptional Changes Detected in the Feces of Dairy Calves Supplemented with Condensed Solubles from Milk Permeate
Authors: dos Santos Rafaela Rodrigues , Osorio Johan S , Senevirathne Nirosh , Sunkesula Venkateswarlu , Rosa Fernanda T
Published: November 2023

Newborn dairy calves are exposed to an environment characterized by multiple challenges, such as pathogen load and nutrient delivery adaptations. Nutritional strategies can help young animals to face these challenges. Hence, we proposed that feeding a type of oligosaccharides (condensed solubles from milk permeate; CS) to dairy calves from birth to postweaning will improve their inflammatory response. This study aimed to perform real-time (RT)-qPCR in RNA isolated from fecal samples to assess the molecular changes relative to inflammation in dairy calves. To address this, 2-days old (d) Holstein calves were randomly assigned into two groups (n = 12/group): control with no supplement; or treatment with 50 g/d of CS. Both groups were fed pasteurized waste milk during the preweaning period. Calves were fed pasteurized waste milk 2×/d during week 1-5, 1×/d in week 6, and weaned at week 7. For the CS-treated calves, at each milk feeding during week 1-5, 25 g of CS was added to the pasteurized milk. At week 6, 25 g of CS was added to the milk morning feeding and 25 g were top-dressed on the starter pellets. Starting at week 7 until the end of the trial at week 12, 50 g of CS were top-dressed on the starter pellets offered to CS calves. Healthy scores were recorded daily. Fresh fecal samples were collected weekly and immediately frozen until RNA extraction. Statistical analysis was performed using MIXED procedures (SAS 9.4) with repeated measures. Significant differences were declared at P < 0.05. The average fecal score postweaning was less in the CS calves relative to the control. Overall, the mRNA expression of the transcription factor of inflammation, NFKB, was less in the feces of the CS group compared with the control. However, the membrane receptor for gram-positive bacteria, TLR2, was upregulated in CS calves relative to control during the postweaning stage (week 8). The fecal gene expression of the membrane receptor for gram-negative bacteria, TLR4, and the proinflammatory cytokines, IL1B and TNFA, did not differ between groups. In summary, the lack of difference in the gene expression of proinflammatory cytokines IL1B and TNFA, along with the TLR4 expression in the feces of the calves, indicate that there was no severe inflammation during the trial. In contrast, TLR2 gene expression findings suggest that some mild local infection might have affected those calves. In conclusion, feeding oligosaccharides to dairy calves might improve the response to inflammation.
PSI-4 Soybean-Supplemented Nursing Ewes Showed Better Performance and Health Status Than Corn-Supplemented Ewes Stocked in Woodlands
Authors: Chaudhary Santoshi , Karki Uma , Shrestha Bhuwan , Lamsal Sadikshya
Published: November 2023

Previous woodland-grazing studies recommended nutritional supplementation to young, growing goats and sheep as well as lactating does. However, information is limited on the role of supplement type to improve the performance and health status of nursing ewes raised in woodlands. This study tested a hypothesis that nursing ewes would remain healthy and perform equally well either with corn or soybean supplements. The study objective was to evaluate the performance and blood parameters of the nursing ewes when stocked in woodlands with corn or soybean supplements. Eighteen Katahdin-St. Croix cross-nursing ewes were divided into two groups. Each group was stocked in a separate set of woodland plots (3 plots/group) and rotated among those plots throughout the study period along with ad libitum hay from May to August 2022. Group-1 ewes were supplemented with whole corn and Group-2 ewes with whole soybean (0.5% of body weight). Animal performance data [body weight, FAMACHA score, and body condition score (BCS)] were measured on day 1, fortnightly during the study, and at the end of the study. For assessing the health status, blood samples were collected on days -1, 45, and 80 and analyzed for hematological and biochemical parameters using ProCyte-Dx Analyzer and Catalyst One (Table 1). Animal performance and blood parameter data were analyzed using the GLM procedure in SAS 9.4. Soybean-supplemented nursing ewes had greater body weight (22%, P < 0.05), and better FAMACHA score (13%, P < 0.01) and BCS (8%, P < 0.001) in comparison to corn-supplemented nursing ewes. Similarly, blood urea nitrogen, alkaline phosphate, cholesterol, and calcium concentration were greater in soybean-supplemented vs. corn-supplemented ewes (P < 0.05). Results suggest that soybean is a better supplement than corn for enhancing the performance and health status of nursing ewes grazing in woodlands.
PSI-11 Phyllanthus Urinaria Water Extract Ameliorates Lipid Accumulation and Oxidative Stress in Primary Chicken Hepatocytes
Authors: Lai Hsiao-Yin , Ding Shih-Torng
Published: November 2023

Fatty liver syndrome is a common metabolic disease that causes decrease in egg production and sudden death of laying hens. Phyllanthus urinaria (PU), a traditional herbal medicine, is widely used as anti-inflammatory and hepatoprotective medicine in Asia. The aim of this study was to investigate the effect of PU water extract on lipid accumulation and oxidative stress in an in vitro fatty liver syndrome model. Primary hepatocytes were isolated from 18 days of Lohmann embryonic chicks. Hepatocytes were cultured in medium with oleic acid (OA, 500 μM) or palmitic acid (PA, 200 μM) to induce lipid accumulation and oxidative stress respectively. Both experiments were treated with different concentration of PU water extract (0, 2, 10, 50 μg/mL) for 24 h. Metformin hydrochloride (1 mM) was used as a positive control. Cell viability, total triglycerides, TBARS, Oil red O staining, and mRNA expression of lipid metabolism-related genes were determined. The results indicated that PU water extract significantly decreased total triglycerides level (P < 0.05) in OA induced lipid accumulation. Moreover, treatment of PU water extract could down-regulate the mRNA abundance of sterol regulatory element-binding protein 1 (SREBP1c), up-regulate the mRNA expression of carnitine palmitoyltransferase 1A (CPT1A) and peroxisome proliferator-activated receptor alpha (PPARα) in lipid accumulated hepatocytes. In oxidative stress experiment, PU water extract at the doses above 10 μg/mL of attenuated increase of malondialdehyde (MDA) abundance induced by PA (P < 0.05). We speculated that PU water extract effectively ameliorate lipid accumulation in primary chicken hepatocytes through decreasing of lipogenesis and increasing of beta-oxidation. PU water extract reduced lipid peroxidase, showing antioxidant effects. These results provide preliminary evidence for supporting PU water extract as a potential therapeutic agent to prevent and treat fatty liver syndrome in chickens.
PSI-15 In-Situ Ruminal Dry Matter Degradability of Three Hydroponic Fodders and Corn Silage in Lactating Holstein Cows
Authors: Salas-Solis Gerald K , Arce-Cordero Jose A , Silva-Vicente Ana C , Vinyard James R , Siregar Martha U , Johnson Mikayla L , Sarmikasoglou Efstathios , Katz Lana M , Ranathunga Sanjeewa , Harding Rob , Blackett Brady , Faciola Antonio P
Published: November 2023

Climate change may have an adverse effect on feed production. Hydroponic fodders produced in controlled environments are alternative feeds that may be used for dairy cattle. The objective of this study was to evaluate in-situ dry matter ruminal degradability of hydroponic fodders and corn silage. Two rumen-canulated lactating Holstein cows were used in a complete randomized block design with four treatments and 9 times (0, 2, 4, 8, 12, 24, 48, 72, and 240 h). Treatments were corn silage (CS), hydroponic sprouts of barley, wheat, and triticale. Quadruplicate samples were placed in Dacron bags (10 x 20 cm, 50 μm porosity) and incubated in the rumen. After incubation, samples were washed and dried in an air-forced oven set at 60°C for 48 h and DM recovery was weighted. Ingredients nutrient composition were CS (32.3% NDF, 8.4% CP, and 41.6% starch, 1.3% WSC; % of DM), barley (34.3% NDF, 17.1% CP, and 4.2% starch, 32.9% WSC; % of DM), wheat (23.7% NDF, 23.3% CP, and 8.5% starch, 32.7% WSC; % of DM), triticale (20.0% NDF, 16.2% CP, and 21.7% starch, 33.2% WSC; % of DM). Model included fixed effects of treatment and random effects of cow and replicate(cow). Data were analyzed using PROC MIXED of SAS. Degradation fractions were calculated based on DM disappearance. There were treatment effects (P < 0.01) on fraction A (degradable), fraction B (potentially degradable), fraction C (undegradable), effective ruminal degradability (ERD), and rate of degradation (kd: %/h). Fraction A was greater for triticale (74.1%) compared with wheat (70.2%), CS (63.1%), and barley (55.0%). Fraction B was greater for barley (28.5%) compared with CS (23.2%), wheat (19.1%), and triticale (13.9%). Fraction C was less for wheat (10.6%) than triticale (12.0%), CS (13.7%), and barley (16.4%). The ERD was greater for wheat (90.8%) compared with triticale (89.0%), CS (88.0%), and barley (85.6%). The kd for barley (2.4%) was less than triticale (4.9%). The kd for CS (1.8%) was less than triticale (4.9%). Overall, triticale had the greatest fraction A, barley had the greatest fraction B, and wheat had the least fraction C and the greatest ERD and kd.
PSIII-13 Effects of Weather, Body Weight, and Feed Intake on Total and Liquid Water Intake in Beef Bulls
Authors: Kovarna Madison , Gonda Michael , Djira Gemechis , Smith Zachary K , Wright Cody
Published: November 2023

Research conducted in the 1950s to determine water requirements used cattle that vary greatly from the animals being raised today. Changes in lean composition and growth rate in young cattle and milk production and mature size in cows have likely altered water requirements. Furthermore, most of the research has been conducted on animals being fed for slaughter, rather than bulls or reproductive females. The objective of this study was to analyze the effect of weather variables, dry matter intake (DMI), and body weight (BW) on total daily water intake (TDWI) in growing beef bulls. Angus (n = 15) and Simmental x Angus bulls (n = 29) with an average initial BW of 362.5 ± 27.0 kg were housed in an open front, monoslope building at the SDSU Cow-Calf Education and Research Facility (CCERF) from November 9, 2021, to March 1, 2022. Bulls were provided with ad libitum access to feed (1.15 Mcal NEg/kg dry matter, 14% crude protein, 52.2% dry matter) and water using the Insentec Roughage Intake Control system (Hokofarm, Marknesse, Netherlands). Feed and water disappearance were assumed to be caused by intake. Water intake was measured in kg; however, the data were converted to L based on a correction factor determined by weighing a known amount of water. Body weights were taken every 28 d to determine ADG and predict daily BW during the duration of the study. Daily weather variables were collected from the South Dakota Mesonet station located 3.86 km from the CCERF. Weather variables analyzed included: average windchill (°C), solar radiation (W/m2), and wind speed (km/h); and minimum, maximum, and average relative humidity (%) and average temperature (°C). R-studio (R-4.1.2.pkg) was used to develop a linear mixed effects model with random intercept and slope used to account for the within subject correlations. Total daily water intake increased with increasing DMI (1.921 L TDWI per kg DMI; P < 0.0001), BW (0.025 L TDWI per kg BW; P = 0.0055), and maximum daily temperature (0.171 L TDWI per 1°C; P = 0.0023). For every 1% increase in the minimum relative humidity, TDWI tended to increase by 0.041 L (P = 0.0616). Warmer wind chill also tended to increase TDWI (0.463 L per 1°C; P = 0.0707). The effects of DMI, BW, maximum daily temperature, minimum relative humidity, and wind chill were predictive of TDWI in growing beef bulls fed during the winter months in South Dakota. This model will be useful for predicting TDWI in growing beef bulls that are raised in areas that experience similar winter weather conditions.
PSIII-3 Effects of Milk Replacer Composition on Beef X Dairy Calf Growth and Muscle Fiber Cross-Sectional Area
Authors: Carter Rachel , Zinn Steven A , Govoni Kristen E , Emenheiser Joe , Felix Tara L , Reed Sarah A
Published: November 2023

Increased availability of female-sexed semen for the generation of replacement heifers within the dairy industry has expanded the opportunity for production of crossbred beef x dairy (BxD) calves. However, data evaluating feeding strategies for BxD calves are limited. The objective of this study was to determine the effects of two different milk replacers on muscle growth of BxD calves compared with dam-reared Angus calves. We hypothesized that both male and female BxD calves fed added fat and protein through milk replacer would have muscle fiber cross-sectional area (CSA) similar to that of purebred Angus calves. SimAngus x Holstein calves (n = 40) were assigned to one of two treatments: a) additional 32.0% crude protein (CP), 30% crude fat (CF) milk replacer (ADD, n = 10 males, 10 females), or b) control 22% CP, 20% CF milk replacer (CON, n = 10 males, 10 females). BxD calves were fed milk replacer 3 times daily from 0 to week 8 of age. BxD calves received starter grain and hay ad libitum at ±3 days of age. Twenty Angus calves (n=10 males, 10 females) were group housed in cow-calf pairs with ad libitum access to maternal milk. Calves were weighed within 24 h of birth. Longissimus muscle biopsies were performed on week 2 and 8. Samples were cryosectioned, stained with wheat germ agglutinin, and analyzed for muscle fiber CSA. Body weight and CSA were analyzed with PROC MIXED of SAS with animal as the subject and fixed effects of treatment, breed, age, sex, and their interactions. Repeated measures analysis was used for CSA. At birth, Angus calves were 24% lighter than BxD (P < 0.0001). Females were 8% lighter than males for both breeds (P ≤ 0.02). At week 2 of age, CSA of ADD BxD calves was 16% smaller than Angus or CON BxD calves (P ≤ 0.07). At week 8 of age, relative to CON, Angus calves had 22% larger CSA (P = 0.02) and ADD BxD calves had 17 % larger CSA (P = 0.07). There was no difference detected in CSA between Angus and ADD calves (P = 0.54). In conclusion, feeding milk replacer with additional CF and CP may increase muscle growth in BxD calves.
PSIII-1 Effect of Cannabidiol Extraction on the Cell Wall Carbohydrate Composition of Hemp Inflorescences
Authors: Agbana Miranda R , Schoch Anna , Altman Alexander , Harmon David L , McLeod Kyle R , Vanzant Eric , Schendel Rachel
Published: November 2023

Since the 2018 Farm Bill, US growers have been allowed to cultivate hemp (Cannabis sativa L.), prompting interest in exploring the use of hemp products in ruminant diets. Extraction of cannabidiol (CBD) oil from hemp biomass generates spent inflorescent material that could be upcycled as a feedstuff, yet little is known about its fiber composition. A recent study measured in vitro true digestibility and fermentation parameters of multiple hemp cultivars, some intact and some CBD-extracted (Altman et al., 2022). Both categories of hemp inflorescence material had similar or greater total digestible nutrients (TDN) than an alfalfa cube control, supporting hemp’s potential as a feedstuff. However, comparisons between non-extracted and CBD-extracted samples could not be made, and the fiber content was only described as neutral detergent fiber (NDF). Fiber composition can significantly impact ruminal digestibility, and in-depth characterizations of cell wall carbohydrate composition can provide further insight into the digestibility of a specific plant-based feed. Therefore, in the present study, we examined the effect of CBD oil extraction on the cell wall carbohydrate composition of the inflorescent material of two hemp cultivars. Intact (Biomass) and CBD-extracted (Spent) inflorescent material from two hemp cultivars, Mary and Zelios, were analyzed. The scell wall monosaccharides of the samples were released via two complementary acid hydrolyses, methanolysis and Saeman (sulfuric acid) hydrolysis, and separated and quantified using high-performance anion-exchange chromatography coupled with pulsed amperometric detection (HPAEC-PAD). Additionally, the carbohydrate linkage patterns were assessed by generating partially methylated alditol acetates (PMAAs). Student’s unpaired t-tests were run in GraphPad Prism, and no differences (P > 0.05) in monosaccharide concentrations based upon treatment (CBD extraction) or cultivar were found with either hydrolysis method except for the methanolysis glucose concentration between the biomass forms of the two cultivars where Mary Biomass possessed more glucose than Zelios Biomass (P <b0.001). In the Saeman hydrolysates, glucose was the dominant monosaccharide (38.75 ± 1.44 molar %), indicating a large amount of cellulose, supported by the presence of 1,4-Glcp in the linkage analysis. Linkage analysis also revealed the presence of xyloglucans and rhamnogalacturonan Type 1 pectins in all materials. The data showed no effect of CBD oil extraction on the monosaccharide composition, suggesting that the extraction process leaves the fiber components mostly intact, but there may be differences in glucose concentration (and consequently cellulose content) between cultivars of hemp. Future studies may benefit more from investigating the impact of hemp cultivar on fiber digestibility rather than impact of the CBD extraction process.
PSIII-4 Effect of Photobiomodulation Treatment on Atp Concentrations in Bovine Oocytes During Maturation
Authors: Richey Kendall D , Hannah Culler , Hersom Matt J , Bridges William C , Checura Celina M
Published: November 2023

Oocyte cytoplasmic maturation is critical in determining the success of subsequent embryo development. It has been proposed that light in the red-to-near infrared optical region (~600–1000 nm) enhances cellular metabolic activity through activation of the mitochondrial respiratory chain, increasing intracellular ATP concentrations, and has the potential to modify the oocyte metabolome. Previous research indicated a greater cleavage rate and similar blastocyst rates for bovine oocytes treated with photobiomodulation at hours 16 and 20 from the start of maturation compared with control. For the present study, two separate experiments were conducted to determine ATP concentration in oocytes during maturation after photobiomodulation treatment. A standardized in vitro maturation (IVM) protocol and commercial media (IVF Bioscience) were used. Briefly, bovine ovaries were obtained at a local slaughterhouse, cumulus oocyte complexes (COCs) were collected by aspiration of small (2 to 6 mm) follicles. For experiment 1, compact COCs were cultured in in vitro maturation media (n = 30/well) and treated with no light (control); light (660-665nm) for 10 minutes at hour 16 from start of maturation (L-16) and light for 10 minutes at hour 20 from the start of maturation (L-20). At hour 24 of in vitro maturation, COCs were vortexed to remove cumulus, stained with BioTracker ATP-Red Live Cell Dye (Sigma-Aldrich SCT045), imaged with Cytation-1 (Agilent Technologies Inc.) in 6 replicates. For experiment 2, COCs were cultured in in vitro maturation media (n = 40/well) and treated with no light (control) and light (660-665nm) for 10 minutes at hour 16 from start of maturation (L-16). At hours 18, 20, 22 and 24 of in vitro maturation, COCs were vortexed to remove cumulus, stained with BioTracker ATP-Red Live Cell Dye, and imaged with Cytation-1 in 4 replicates. For experiment 1, one-way ANOVA and Student’s T-Test were performed (JMP software 16.0); in experiment 2, each well was considered as an experimental unit in a model of repeated measures, main effects of time and treatment, blocked by replicate (Mixed procedure, SAS Institute Inc.). In experiment 1, there was a significant (P < 0.05) effect of treatment; ATP concentrations were greater in L-16 than control, and L-20 was intermediate. ATP concentrations were 19,579.3a ± 596.5, 21,652.0b ± 602.7 and 19,710.9ab ± 570.6 relative fluorescence units (RFU) for control, L-16, and L-20 respectively. In experiment 2, there was a significant (P < 0.05) effect of treatment and no significant effect of time. Overall ATP concentrations were 25,668 ± 894.6 and 28,332 ± 894.6 RFU for control and L-16 respectively. In conclusion, photobiomodulation treatment with LED 660-665nm for 10 minutes at hour 16 from start of oocyte maturation increases intracellular ATP concentrations from hour 18 to 24 of maturation.
PSIII-12 The Effects of PGF2 and PGF2 Plus Gnrh on Estrous Behavior and Pregnancy Outcomes in Dairy Goats
Authors: Kolikapongu Ramya Sri , Namani Sharath Chandra , Shaik Arshad , Neha Ayesha , Chelkapally Sai Chandan , Perry Courtney , Woodard Joshua , Schauston Miller , Whitley Niki C , Kouakou Brou , Moawad Adel R R
Published: November 2023

Artificial insemination protocols depend on efficient behavioral estrus detection and insemination time in dairy goats. Here we examined the effects of two synchronization protocols, prostaglandin F2α (PGF2α; protocol 1) and PGF2 plus gonadotropin-releasing hormone (GnRH; protocol 2) on estrus behavior, body temperature, pulse frequency, pregnancy protein B (PPB) concentrations, and pregnancy rates in Alpine and Saanen goats. Forty does (3.9 ± 0.28 year) were divided into two groups (20 each) with 10 Alpine and 10 Saanen females in each group. In protocol 1 goats were injected with 10 mg/goat PGF2α on day 0 and 11. In protocol 2, each goat was injected with 10 mg PGF2α on day 0, and 43 µg GnRH on day 9 and then 10 mg PGF2 α on day 11. Estrus signs were detected 24 to 36 hours after the second dose of PGF2α. Body temperature and pulse frequency were recorded on days 11, 12, 13, and 14 after the second dose of PGF2α. Goats that showed estrus signs were naturally bred with the same breed mature buck. Blood samples were collected on days 28, 35, and 42 post-breeding (PB) to assess PPB concentrations, and ultrasonography was performed on day 50 (PB) to confirm pregnancy. The percentage of female showed estrous was higher in protocol 1 than in 2 (70% vs. 60%). Irrespective of the breed, rectal and vulval temperature was higher in the protocol 2 than 1 at day 11 after PGF2 α injection; however, it was the opposite at days 12, 13, and 14. However, the pulse frequency was greater (P < 0.05) in protocol 2 at all the time point. Pregnancy rates were 71.4% and 75.0% for protocols 1 and 2, respectively. Irrespective to the synchronization protocols, the pregnancy rates were greater (P < 0.05) in Alpine than Saanen goats. In conclusion, both PGF2 and PGF2-GnRH protocols were effective in synchronizing estrus in Alpine and Saanen goats, with minor differences in estrus response rates and pregnancy outcomes. Breed-specific variations were observed within the protocols, indicating a potential influence of breed on the efficacy of estrous synchronization. This study contributes valuable insights to goat breeding programs and promotes more efficient and sustainable livestock management practices.
PSIII-7 Effect of Time of Estrus on Conception Rate for a Sexed Semen Artificial Insemination Protocol in Multiparous Beef Cows
Authors: Efird Emily E , Lawrence Ty E , Richeson John T , Weber Wyatt E , Looney Charles R , Perkins Tommy L
Published: November 2023

Sexed semen artificial insemination is a breeding technique that allows producers to shorten breeding seasons, optimize genetics through use of superior semen, create calves based on sex preference, and increase profitability. Sexed semen is a technology that sorts semen by differences in DNA content between X (female) and Y (male) bearing sperm. However, sexed semen practices have yet to be widely used in beef cows due to reduced sperm numbers, low conception rates, and increased costs. The objective of this study was to determine the effect of time of estrus upon fixed-time artificial insemination (FTAI) of sex-sorted semen on conception rate using two different estrous synchronization protocols. Multiparous commercial beef cows (n = 73) were randomized by age, body condition score (BCS), and days post-partum at the University of Arkansas Livestock and Forestry Research Station in Batesville. Both synchronization treatments (TRT) used a controlled internal drug releasing device (Eazi-breed CIDR; 1.38g progesterone) inserted intravaginally on d -14 of the protocol simultaneous to administration of prostaglandin F2α (PGF; 500µg cloprostenol sodium; Estrumate). In the first treatment (TRT 1; 7&7 Synch), gonadotropin-releasing hormone (GnRH; 86µg gonadorelin; Fertagyl) was administered on d -7. In the second treatment (TRT 2; 8&6 Synch), GnRH was administered on d -6. Both treatments were then administered PGF simultaneous to CIDR removal on d 0, 66 ± 2h before FTAI and administration of GnRH. Standing heat (estrus) was visually detected every 3 h for 30 min intervals between CIDR removal and FTAI. Heat detection patches were used in conjunction with visual detection of estrus. Time of estrus was signified as time of standing immobile when mounted in combination with presenting a patch score of 4 (>75% color removed). Time of estrus (TD) was deviated from time of FTAI and categorized into three equal time groups (Grp 1 = 0 to 11.0 h; Grp 2 = 11.01 to 22.0 h; and Grp 3 = 22.01 to 33.0 h). Conception rate (CR) was determined via ultrasound 37 ± 2 d after FTAI. Data were analyzed using the GLIMMIX procedure of SAS 9.4. CR did not differ by age of dam (P = 0.58), BCS (P = 0.48), or TRT (P = 0.83). However, TD had an effect on CR (P = 0.002); and resulted in CR of 45% (Grp 1), 87% (Grp 2), and 42% (Grp 3). In conclusion, these results indicate artificially inseminating cows with sexed semen between 11.01 and 22.0 h after time of standing estrus will increase pregnancy rates for multiparous commercial beef cattle.
PSIII-2 Pediococcus Acidilactici Demonstrates Probiotic Properties and Inhibits the Growth of Enterotoxigenic Escherichia Coli
Authors: Brown Rebecca , Zheng Rui , Jacobi Sheila K
Published: November 2023

Lactic acid bacteria are recognized to possess probiotic properties including modulating host physiology. Probiotics are used as direct-fed microbials in the swine industry to optimize pig performance and production efficiency. In the nursery, probiotics have been shown to mitigate post-weaning diarrhea caused by enterotoxigenic Escherichia coli (ETEC). Studies show beneficial effects of supplementing probiotics and the data were inconsistent. Microbial genome sequencing could help better define the mechanisms of probiotic mode of action and dose required to improve probiotic efficacy. The aim of this study was to determine if Pediococcus acidilactici PECh3A (PA) that has been genome sequenced for determining gut physiology mechanisms expresses probiotic properties in-vitro. The growth curve of PA was conducted to determine colony forming units (CFU)/mL concentrations in 2-hour intervals until plateau at 15 hours. Based on the results of the growth curve dose response analysis were performed for acid and bile tolerance and antimicrobial activity against ETEC (3030-2: K88ac LT and STb). Doses investigated were 1010, 109, and 108 CFU/mL. For the acid and bile tolerance experiment PA was grown to concentration 1010 CFU/mL and was centrifuged and inoculated in De Mab, Rogosa, and Sharpe broth (MRS Broth) at pH 2, 4, or 6.5 (control) or MRS ± 0.3% oxgall (wt/vol), respectively, and incubated for 4 h. Following the 4 h incubation samples were serially diluted, plated, and incubated at 37°C for 24 h to determine percent survival. Antimicrobial inhibition of ETEC was assessed by the agar zone of inhibition (ZOI) methods. PA was grown to previously defined CFU/mL concentrations and 100 µL of the culture and filtered supernatant were plated into wells on nutrient agar plates spread with 107 ETEC CFU/mL. ZOI were measured in mm. Data were analyzed according to a factorial design using PROC MIXED procedures in SAS. Survival in acidic media relative to control media was observed in all doses (108,109, and 1010) at pH 4 and minimally at pH 2 (81.8, 90.6, and 89.5% or 33.8, 28.0, and 0% ±7.7, respectively; P < 0.01). PA survival in 0.3% oxgall increased with increasing dose (74.3, 83.3, and 91.7% ±0.67; P < 0.01). PA culture exhibited antimicrobial activity against ETEC at all doses tested, and the PA filtered supernatant exhibited antimicrobial activity from 109 CFU/mL (4.260 mm ± 0.9437, P < 0.01). Taken together the findings indicate that PA PECh3A exhibits functional probiotic properties to potentially improve swine intestinal physiology. Further in vitro and in vivo experiments will access Pediococcus acidilactici PECh3A function and interaction within the host environment.
PSV-8 Maternal Live Yeast Supplementation Improved Gut Health in Suckling and Weaned Piglets
Authors: Fu Yuechi , Li Enkai , Casey Theresa M , Johnson Timothy A , Adeola Olayiwola , Ajuwon Kolapo M
Published: November 2023

Recent studies have highlighted the importance of maternal nutritional intervention in modulating the gastrointestinal development and health of offspring. The objective of this study was to determine the effects of live yeast supplementation to sows during late gestation and lactation periods on the gut health of piglets pre-weaning and immediately post-weaning. Based on parity and expected farrowing dates, on d 77 of gestation, 40 sows were allotted to 2 dietary treatments: without (CON) or with (LY) live yeast supplementation at 0.05% of diet during gestation and 0.1% during lactation. On postnatal days (PND) 0, 10, 18, and post-weaning days (PWD) 7 and 14, one piglet from 10 sows per treatment was selected for intestinal tissue collection (n = 10). Results showed that maternal LY supplementation increased mRNA expression of interleukin (IL)-6 on PND 18 and IL-1β on PWD 14 in the ileal mucosa (P < 0.05), with a tendency for greater IL-10 on PND 18 (P = 0.08). Additionally, LY piglets had increased mRNA expression of superoxide dismutase 1 on PND 10, 18, and PWD 14 (P < 0.05) and tended to have a greater mRNA abundance of catalase on PND 14 in the ileal mucosa (P = 0.09). Compared with CON piglets, LY piglets had an increased protein abundance of E-cadherin on PND 0, PWD 7, and 14 in the jejunal mucosa (P < 0.05). The LY piglets also had a greater protein abundance of occludin and claudin-4 in the jejunal mucosa on PWD 14 (P < 0.05). However, no differences were found for jejunal histomorphological measurements between treatments (P > 0.05). In conclusion, maternal LY supplementation may have a long-term protective effect on gut health of offspring by regulating the expression of tight junction proteins, inflammatory response, and antioxidant capacity.
PSV-6 The Impacts of Heat Stress on Litter Traits of Landrace Population in Taiwan
Authors: Lin Kai-Hsiang , Lin En-Chung
Published: November 2023

Global warming becomes a serious issue in the swine industries of most countries. Sow reproduction suffers the brunt of heat stress problems in tropical and subtropical zones, such as in Taiwan. Litter traits, total number born (TNB) and number born alive (NBA), are essential for sow stability and farm economics. However, these traits are influenced by management, facilities, and environmental conditions. Adjustments to management practices and facilities must be considered environmental conditions, including temperature and relative humidity, particularly in Taiwan under oceanic climates. Such specific climate with high temperature and relative humidity caused heat stress for sows around Taiwan over six months in a year. Therefore, the impact of heat stress at different stages of pregnancy in sows had been analyzed using the best linear unbiased prediction model with heterogeneous residuals. A total of 11,074 records for TNB and NBA from 3,080 Landrace sows were collected from two farms between 2008 and 2021. Simultaneously, weather data were obtained from those weather stations closest to the farms. Sows from mating to farrowing, about four months, had been classified into cool (C) or hot (H) climate condition in each month based on temperature-humidity index equals 70. Hence, there were eight combinations (CCCC, CCCH, CCHH, CHHH, HHHH, HHHC, HHCC, HCCC) of the climate effect in this study. The results of climate effect showed that there was not significant difference among the groups of CCCC, CCCH, CCHH, and CHHH in TNB and NBA, while no significant difference (P > 0.05) was found among the groups of HHHH, HHHC, HHCC, and HCCC in both traits. However, the climate effects of CCCH, CCHH, and CHHH were greater (P < 0.05) than those of HHHC, HHCC, and HCCC in TNB. The climate effects of CCCH and CCHH were greater than those of HHHH, HHHC, HHCC, and HCCC in NBA (P < 0.05). These fluctuations generally indicated when sows experience heat stress on mating and early stage of pregnancy (HHHH, HHHC, HHCC, HCCC), could decrease litter sizes. In the heterogeneous residual variances, the groups of CCCC, CCCH, CCHH, and CHHH were less than the groups of HHHH, HHHC, and HHCC in TNB, significantly, while the groups of CCCC, CCCH, and CHHH were less than the groups of HHHH, HHHC, and HHCC in NBA (P < 0.05). The greatest estimated residual variances were shown in HHCC in both TNB and NBA. These changing of trends indicated high heterogeneous residual variance was discovered when heat stress happened during mating and early pregnancy of sows (HHHH, HHHC, HHCC). In conclusion, heat stress at mating and early stage of sow pregnancy decreased the average and increased the residual variances of TNB and NBA.