Browsing by Author "Riley, David G"
Now showing items 1-20 of 26
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Cook, Christian L (2017-09-05)The studies described herein were designed to characterize measures of immune responsiveness in weaned Brahman calves, breeding bulls and cows. Experiment 1 included 55 weaned bull and 57 weaned heifer Brahman calves. ...
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Mickey, Dana Marie (2021-07-19)The objectives of this study were to analyze calf performance traits and female reproductive traits in reciprocal F2 Nellore-Angus calves (n = 539) born 2010-2015 and calves out of these F2 females through 4 yr age (n = ...
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Knowles, Arthur James (2019-05-21)Bovine Viral Diarrhea Virus (BVDV) is a component of bovine respiratory disease complex, which has been reported to cause the largest loss in productivity in feedlot cattle in the U.S., with annual economic losses in excess ...
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Baker, Emilie Clare (2022-12-13)Stress-induced epigenetic modifications and the accompanying shifts in gene expression could be a potential mechanism behind the performance differences seen in prenatally stressed offspring. Two groups of cows were used ...
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O'Daniel, Sydney Elizabeth (2019-07-25)Two experiments were conducted to evaluate the effects of acute inflammation (Experiment 1) and parity (Experiment 2) on peripheral blood leukocyte telomere length (TL) in Brahman cattle. Experiment 1 utilized 11 heifers ...
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Schmidt, Sarah Erin (2014-04-24)Stress incurred due to standard management practices applied to pregnant cattle may affect the health and productivity of the offspring. Separate studies were conducted to determine: 1) the extent to which transportation ...
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Littlejohn, Brittni Paige (2018-03-08)This project consisted of two main objectives. Objective 1 assessed the influences of prenatal stress on 1) postnatal physiological functions and 2) the postnatal presence and prevalence of epigenetic differences, specifically ...
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Holland, Paul Wesley (2018-07-24)Ewe reproductive life traits such as longevity and stayability (the probability that a ewe will avoid removal from the flock due to reproductive performance or health) are economically important because of the relationship ...
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Woolfolk, Matthew (2014-08-18)The objectives of this study were to estimate heritability of performance traits in Brahman and Brahman-influenced (¼ or ½ Brahman) stocker cattle on cool-season (n = 1,732) and warm-season (n = 1,199) forages. Cattle were ...
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Pena, Carlos Raul (2020-01-14)The genetics of longevity in beef cattle production is a critical aspect of efficiency, thus making it an economically important trait. Variation in longevity has been observed between different breeds, and is dependent ...
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Bauer, Lance William (2022-12-12)The goal of this study was to assess the correspondence between feed efficiency and maternal traits, feed efficiency and carcass traits, and carcass traits and maternal traits. Two sets of data from Beefmaster Breeders ...
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Tolleson, Mallory Williams (2016-04-22)The objective of this study was to conduct a genome-wide association study for udder traits for crossbred cows. Average teat diameter, average teat length, and udder support score were evaluated in cows (n = 295) from 13 ...
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Cilkiz, Kubra (2018-08-06)Increasing demand for poultry meat has encouraged production of the maximum possible yield from chicken, which resulted in broiler chickens being subjected to intense selection for increased Pectoralis major (P. major) ...
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Wilson, Kyle Everett (2021-04-14)The objective of the study was to evaluate genomic based inbreeding within a closed population of Nellore-Angus crossbred cows and the effect it has on growth and reproductive traits. From 2003 to 2018, cows were evaluated ...
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Engle, Bailey (2019-05-30)Beef cow reproductive longevity represents the cumulation of a lifetime of fertility and production traits and is an important contributor to a producer’s profitability. Stayability is a component of longevity, and is often ...
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Langdon, John Michael (2019-10-17)Sufficiently accounting for genotype-environment interactions would enhance genetic merit prediction and parameter estimation for traits of economic prominence in beef cattle. The objective of this work was to utilize ...
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Bohac, Jennifer Kay (2015-12-01)Calf crop born, calf crop weaned, calf birth weight, calf weaning weight, and calf preweaning average daily gain (ADG) were evaluated from 1997 to 2009 in Brahman (B) and Angus (A) straightbred and crossbred cows (n = 194). ...
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Hulsman Hanna, Lauren L; Sanders, James O; Riley, David G; Abbey, Colette A; Gill, Clare A (Genetics Selection Evolution, 2014)
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Holland, Paul W (2015-05-05)The genetics of coat color for cattle are important to breeders and breed associations because phenotypes of these animals are used for breed recognition and premiums or discounts can be given due to the phenotypes. The ...
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Dillon, Jasmine Ashley (2013-12-04)Brahman cross calves exhibit unusual inheritance of birth weight: Brahman-sired crossbreds out of Bos taurus females are heavier with greater difference between sexes than calves of the reciprocal cross. The objective of ...