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Role of preovulatory estradiol in uterine and luteal function
(University of Missouri--Columbia, 2018)
) was examined in Angus heifers having low (5.0 [plus or minus] 0.6; pg/mL n=6) or high (10.2 [plus or minus] 1.0 pg/mL; n=6) preovulatory concentrations of E2 on day 0 (P< 0.0005). In vivo produced embryos (n=5 per heifer) were transferred on day 7...
Developmental exposure to bisphenol a (BPA) and ethinyl estradiol (EE) and effects on F1 parental care and F2 pup parameters in California mice (Peromyscus californicus)
(University of Missouri--Columbia, 2017)
[ACCESS RESTRICTED TO THE UNIVERSITY OF MISSOURI AT REQUEST OF AUTHOR.] Environmental exposure during the perinatal period can promote health and disease in offspring, otherwise coined developmental origins of health and disease (DOHaD). Endocrine...
Factors affecting neonatal beef calf metabolism and vigor
(University of Missouri--Columbia, 2021)
were investigated in beef cattle. Colostrum volume and weight from nutrient restricted dams was 40 percent less compared with control dams. Although gestational nutrition did not affect gestation length or calf birth weight, calves born to control dams...
Potential diagnostic methods and nutritional changes to combat bovine respiratory disease in receiving cattle
(University of Missouri--Columbia, 2017)
alike. Experiments were conducted in 2 studies to investigate aspects of nutrition and animal health in receiving cattle. Blood chemistry and immune components of sick and healthy cattle, along with feed intake, growth, and feed efficiency were evaluated...
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 work describing the taxonomic...
Genetic and nutritional effects on reproduction in lactating dairy cows
(University of Missouri--Columbia, 2020)
background but are influenced by maternal nutrition. Study four investigated the association between milk PAG S-N in early gestation with variables related to the dam, sire and gestating fetus. Dam genetic merit for milk production did not have a large effect...
Factors affecting neonatal and peripartum maternal metabolism and behavior in beef cattle and horses
(University of Missouri--Columbia, 2018)
Three studies were conducted to investigate perinatal changes in metabolism and behavior of beef cattle and horses. In the first study, effects of parity on perinatal nutrient availability assessed through calf size and ...
Effects of the bovine slick mutation on heat stress responses and hair growth in mice
(University of Missouri--Columbia, 2020)
[degrees]C WT/WT mice (4.41 [plus or minus] 0.08) consumed a higher FD than WT/MUT (4.19 [plus or minus] 0.06) and MUT/MUT (4.13 [plus or minus] 0.12) (P<0.05). Males and females showed different TT (F= 28.84 [plus or minus] 0.0.05 vs. M= 29.07 [plus...
Investigation of mechanisms associated with establishment and maintenance of pregnancy in beef cattle
(University of Missouri--Columbia, 2020)
were either estrual (Adequate endogenous E2 for estrus expression; n = 105) and assigned to the Positive Control group or nonestrual and randomly assigned to either no treatment (Low endogenous E2; Negative Control; n = 112) or administration of a 2 m...
Effects of heat stress on leukocyte function and gene expression in lactating dairy cows
(University of Missouri--Columbia, 2018)
[ACCESS RESTRICTED TO THE UNIVERSITY OF MISSOURI AT AUTHOR'S REQUEST.] The effects of heat stress in animal agriculture are expected to become more serious as global temperatures continue to increase. Negative effects on production, reproduction...
Evaluation and development of early pregnancy diagnosis in dairy cattle
(University of Missouri--Columbia, 2018)
Early chemical pregnancy tests for use in dairy cattle are necessary to aid in reducing the costs associated with days the animal is not pregnant. Identifying non-pregnant dairy cattle sooner would allow for efficient ...
Estimates of correlation between estrus behavior and estradiol concentrations during estrus
(University of Missouri--Columbia, 2020)
rump touches and number of steps during estrus. Holstein-Friesian cows (n = 1197; Study 1) across five pasture-based grazing dairy herds were fitted with a capacitive touch sensing (CTS) device on the rump (FlashMate; Farmshed Labs Limited, Hamilton, NZ...
Applications of ancestry estimation in cattle population genetics
(University of Missouri--Columbia, 2019)
Accounting for ancestry and cryptic population structure is important in population genetic data analysis. The estimation of ancestry can help elucidate the effects of admixture or stratification on allele and genotype ...
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 ...
Systemic effects of mastitis in the dairy cow : identifying mechanisms underlying impaired lactation in non-inflamed glands
(University of Missouri--Columbia, 2020)
-treatments: in T cows, infusion of 50 [micrograms] LPS (T-L) or saline (T-S); in C cows, infusion of saline (C-S) or no infusion (C-N). Front quarters were sampled for milk production and composition while rear quarters were biopsied at 0, 3, and 12 h, relative...
Evaluation of the 7 and 7 synch protocol for control of the estrous cycle among beef cows prior to fixed-time artificial insemination with sex-sorted or conventional semen
(University of Missouri--Columbia, 2021)
Experiment 1 was conducted to compare 7 and 7 Synch and the 7-day CO-Synch + controlled internal drug release (CIDR[copyright]) protocols prior to fixed-time artificial insemination (FTAI) of beef cows with conventional or sex-sorted semen. Cows (n...
Genetics in practice : applications of quantitative genetics to environment and educational pursuits
(University of Missouri--Columbia, 2018)
"The ability to elucidate quantitative trait architecture and introduce potentially beneficial traits makes introgression a useful tool. Unfortunately, due to the nature of inheritance there are certainly limitations to ...
Investigating the role of a lncRNA (4833427F10Rik) in mouse placental development and function
(University of Missouri--Columbia, 2022)
Long non-coding RNAs (lncRNAs) have traditionally been viewed as transcriptional noise. However, experimental evidence of their cell-type-specific expression, presence of functional genetic elements, along with their role ...
Ablation of conceptus PTGS2 provides a new understanding of early pregnancy events in the pig
(University of Missouri--Columbia, 2019)
Pig conceptuses produce and secrete estrogens (E[2]), interleukin 1 beta 2 (IL1B2), and prostaglandins (PGs) during the period of rapid trophoblast elongation and establishment of pregnancy. Previous studies established ...
Digestible lysine and threonine requirements of male turkeys and their effects on performance of male turkeys fed practical diets to market age
(University of Missouri--Columbia, 2008)
Seven experiments were conducted to determine the minimum requirements of digestible lysine (dLys) and digestible threonine (dThr) from 1 to 21 weeks of age for male turkeys. Requirement values were similar to NRC (1994) ...