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Serum T₄ and liver NAD and NADP as performance indicators in beef cattle

Creator:: Brokaw, Bryan Edward
Abstract:: The relationships of serum T₄ (thyroxine) levels and liver nicotinamide nucleotide coenzyme (NAD and NADP) levels with production of traits of beef cattle were investigated at both weaning (182 kg) and following performance testing (363 kg). In addition, the value of these parameters as selection criteria for improved performance was...
Resource Type:: Dissertation
Full Text:: another means of testing for differences due to age, a paired t-test was made between the T 4 levels at

Effectiveness of index and elite selection methods

Creator:: Douglass, Larry W.
Abstract:: Mice were used to compare the index and elite selection methods for simultaneous selection of four traits. Selection was for litter size, birth weight, weaning weight and post-weaning gain. Progress was evaluated by examining total phenotypic merit. The standard deviations from the cycle mean for the four traits were summed...
Resource Type:: Dissertation

Estimates of combining abilities, heterotic effects and phenotypic correlations among in-bred lines of beef cattle and their line-crosses

Creator:: Humes, Paul Edwin
Abstract:: The investigations were based on a complete diallel cross among three inbred lines of Hereford cattle. Records of Angus calves born during the same period were used to obtain more accurate estimates of environmental effects and to determine breed differences among the various traits included in the study. Estimates of...
Resource Type:: Dissertation
Full Text:: members Dr, Rod V. Frakes, Fredrick L. Hisaw, Jr. and W. R. Furtick for the time and competent advice

Genetic and physiological relationships of growth hormone and growth in goats

Creator:: Simms, Danny Dale
Abstract:: An F₁ population resulting from mating pygmy and normal goats (local commercial breeds) was crossed to give an F₂ population. Analysis of wither height and body weight indicated that the F₂ population was intermediate between the parental types (pygmy and normal) with little overlap of phenotypic values for body size...
Resource Type:: Dissertation
Full Text:: . Frakes, Donald L. MacDonald, and Morris W. Montgomery are gratefully acknowledged. These men and Drs

Electrocardiograms and related variables of dwarf beef cattle

Creator:: Pinjani, Moti, 1939-
Abstract:: Electrocardiograms from 12 compressed male (CM), 16 compressed female (CF), ten synthetic compressed female (SCF), nine brachycephalic female (BF), and 15 dolichocephalic female (DF) dwarfs from Davis, California, taken in the scapular lead S-II (prescapular position positive and right forelimb negative) were analyzed, The data on dwarf electrocardiograms were compared...
Resource Type:: Dissertation
Full Text:: and Manning at Corvallis, Oregon. The average R-R, P--R, Q-T, and T-Q intervals, and the QRS

Morphology of epididymal spermatozoa from inbred and linecross bulls

Creator:: Turner, H. A.
Abstract:: Data were presented on epididymal spermatozoa from 29 inbred and linecross bulls raised at Oregon State University in connection with the Western Regional Beef Cattle Breeding Project, W-1. The inbred bulls came from four inbred lines. Three of these inbred lines were Herfords and the other line was Angus. The...
Resource Type:: Masters Thesis
Full Text:: Beef Cattle Breeding Project, W -1. The inbred bulls came from four inbred lines. Three of these

Performance of three inbred lines of Herford cattle and their linecrosses

Creator:: Munji, Marcus Tebid
Abstract:: Three inbred and relatively unrelated lines of Hereford cattle (1. Lionheart, 2. Prince, and 3. David) developed at the Corvallis branch of the Oregon Agricultural Experiment Station as part of the W-1 project of the Western States were crossed annually from 1963 through 1965 inclusive. Data on 137 inbred and...
Resource Type:: Masters Thesis
Full Text:: appreciation go to Dean W. T. Cooney for his very special interest in the writer's education at O. S. U

Gonadotropins in pituitaries of inbred and linecross beef bulls and effects of irradiation of mammalian pituitary glands on their ability to induce in vitro ovulation of frog ovaries

Creator:: North, Warren Arthur
Abstract:: There were two studies involved in the thesis research. In the first study, variation in the amount of adenohypophysis gonadotropins among 22 individual beef bulls were investigated. These bulls represented four inbred lines, and six linecrosses. The bulls were raised in the Oregon State University purebred herd. The bulls were...
Resource Type:: Dissertation
Full Text:: male and female mice were used to assay for gonadotropic potency. T -test values showed all bull

The inheritance of medullation in wool

Creator:: Young, Sing Sze
Resource Type:: Masters Thesis
Full Text:: % medullation Figure 7. Heavily-medullated ram x Non-medullated ewe i$ w X Lamb Ewe Medium

Analyses of physical sources of variation in estimated genetic growth parameters in beef cattle

Creator:: Sabin, Samuel Waybright
Resource Type:: Dissertation
Full Text:: r t r ) r rt. .. t t .,.. + fi 0 10 1b 1' I6 L? ur, 2' w ,a 3e 62 n Sebl* l. 2. 7

ScholarsArchive@OSU

Serum T₄ and liver NAD and NADP as performance indicators in beef cattle

Effectiveness of index and elite selection methods

Estimates of combining abilities, heterotic effects and phenotypic correlations among in-bred lines of beef cattle and their line-crosses

Genetic and physiological relationships of growth hormone and growth in goats

Electrocardiograms and related variables of dwarf beef cattle

Morphology of epididymal spermatozoa from inbred and linecross bulls

Performance of three inbred lines of Herford cattle and their linecrosses

Gonadotropins in pituitaries of inbred and linecross beef bulls and effects of irradiation of mammalian pituitary glands on their ability to induce in vitro ovulation of frog ovaries

The inheritance of medullation in wool

Analyses of physical sources of variation in estimated genetic growth parameters in beef cattle

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