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Effects of fescue toxicosis and chronic heat stress on murine hepatic gene expression
(University of Missouri--Columbia, 2006)
Fescue toxicosis affects domestic animals grazing fescue pasture infected with the endophytic fungus, Neotyphodium coenophialum. Signs of fescue toxicosis include increased body temperature and respiration rate and decreased ...
Selection for placental efficiency in swine
(University of Missouri--Columbia, 2004)
With the overall goal of increasing profitability by increasing litter size, two lines of pigs were divergently selected for four generations on an index of reproductive traits (n = 193 litters). The selection index (SI) ...
Effect of dry matter intake restriction on energy balance, ruminal fermentation, and nutrient retention by beef steers
(University of Missouri--Columbia, 2005)
Two studies were conducted to determine the effects of DMI restriction on digestion and metabolism by feedlot steers. In Trial 1, 12 Angus X steers (BW [almost equal to] 450 [plus or minus] 18 kg) were assigned randomly ...
Effects of continous administration of low-dose of Escherichia coli lipopolysaccharide in chicks and poults fed non toxic doses of aflatoxin B1 and T-2 toxin
(University of Missouri--Columbia, 2005)
Six studies (three with broilers and three with turkeys) were conducted to determine if E. coli lipopolysaccharide (LPS) would enhance the effects of aflatoxin B1 (AFB1) and the T-2 toxin (T-2) in chicks and poults fed ...
Impacts of late gestational tall fescue forage systems on preweaning calves
(University of Missouri--Columbia, 2015)
A 2 year experiment was conducted researching the impact of common lower Midwestern beef cattle winter forage systems on late gestation, spring-calving beef cows and their subsequent calves. We hypothesized that cows grazing ...
Development of a pregnancy associated glycoprotein assay to detect late embryonic mortality in cattle
(University of Missouri--Columbia, 2015)
[ACCESS RESTRICTED TO THE UNIVERSITY OF MISSOURI AT REQUEST OF AUTHOR.] Embryonic mortality (EM) decreases profitability of a beef or dairy operation because of the impact that it is has on delaying the time of conception ...
Strategic progesterone testing as a method to predict conception and manage reproduction in dairy cows
(University of Missouri--Columbia, 2015)
Timed AI (TAI) programs have increased reproductive efficiency in dairy herds, but conception rates to TAI remain below 50% for most herds. The low TAI pregnancies per AI (P/AI) is partially explained by cows that do not ...
A survey of relationships among rare breeds of swine
(University of Missouri--Columbia, 2014)
Swine production has evolved over the last century resulting in the loss of biodiversity among breeds utilized by commercial producers. Only a handful of breeds are used extensively by these producers, with many swine ...
Determining best predictors of animal performance in feedlot steers
(University of Missouri--Columbia, 2015)
Two studies were performed in a feedlot environment to determine the long-term effects of heat events on animal performance and well-being. Experiments in this thesis were designed to pinpoint ambient variables that most ...
Strategies to improve corn residue utilization
(University of Missouri--Columbia, 2015)
Two experiments investigated methods to increase corn residue utilization by forage processing, water and supplement addition, and harvest method. In the first experiment, feeding high-moisture, lower fiber corn stover ...
Efficacy of adsorbents and antioxidants in reducing the effects of mycotoxins in broilers and pigs
(University of Missouri--Columbia, 2015)
Feed is the most expensive aspect of livestock production, accounting for around 69% of total cost (Donohue and Cunningham, 2009). This high cost drives the incentive to offer a properly balanced diet, which supplies the ...
Improved cloning efficiency by chemically induced metabolic reprogramming of donor cells used for porcine somatic cell nuclear transfer
(University of Missouri--Columbia, 2019)
The use of somatic cell nuclear transfer (SCNT) to create agricultural and biomedical models is extremely useful for understanding how we can improve the efficiency of production agriculture, as well as how we can better ...
Evaluating progestin-based protocols to control estrous cycles of beef heifers prior to timed artificial insemination
(University of Missouri--Columbia, 2018)
The recent development of split-time artificial insemination as a breeding strategy improved reproductive outcomes following treatment with the 14d CIDR[copyright]-PG protocol; however, STAI has not been evaluated with ...
Estimates of correlation between estrus behavior and estradiol concentrations during estrus
(University of Missouri--Columbia, 2020)
Estrus traits have economic value in dairy production systems and can potentially be incorporated into genomic selection. Three studies were performed to further understand selection responses. Study one and two explored ...
Exploration of fecal microbial transfer and the competitive exclusion concept in broilers as a possible alternative to antibiotic growth promoters
(University of Missouri--Columbia, 2021)
Four studies were conducted to explore the effects of early life Fecal Microbiota Transfer (FMT) from healthy feed efficient finished broilers into day-old broiler chicks on growth performance indices, changes and or ...
Effect of preovulatory estradiol and(or) postovulatory progesterone on the establishment of pregnancy in beef cattle
(University of Missouri--Columbia, 2018)
Preovulatory secretion of estradiol and postovulatory secretion of progesterone are essential for preparing the uterine environment for pregnancy in cattle. In a previous study, circulating concentrations of preovulatory ...
Paternal effects on pre-implantation embryo development in cattle
(University of Missouri--Columbia, 2021)
Currently, sire fertility is measured using sire conception rate (SCR), which is not always indicative of embryo development. Since the majority of pregnancy loss in dairy cattle occurs during the early embryonic period, ...
Investigation of methods and factors influencing mouse oocyte quality, in vitro fertilization and embryo development
(University of Missouri--Columbia, 2018)
Mice are one of the most commonly used rodent species as a model for biomedical research to better understand molecular, genetic, and cellular causes of human disease and disorders. The production of good quality oocytes ...
Taxonomic and metagenomic approaches to diet, health, and breeds of ruminants
(University of Missouri--Columbia, 2020)
Ruminant mammals maintain a symbiotic relationship with their gut microbiome, the organisms of which break complex plant matter into metabolites that are absorbed by the host animal for its nutrition. Building on prior ...
Effects of the bovine slick mutation on heat stress responses and hair growth in mice
(University of Missouri--Columbia, 2020)
The bovine slick mutations result from more than one allele variant causing a slick hair phenotype and improved thermotolerance to elevated ambient temperatures in cattle. These mutations result in the truncation of the ...