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Selection applied, response of traits and combining abilities of inbred lines of beef cattle

Creator:: Hoornbeek, Frank K. (Frank Kent), 1928-
Abstract:: The investigations reported are based on two studies; the first is concerned with the selection practiced for performance in one inbred Angus and three inbred Hereford lines of cattle, the realized responses, levels of inbreeding and associated performance, and heritabilities of the performance traits. Selection differentials for all performance traits...
Resource Type:: Dissertation
Full Text:: Selection applied, response of traits and combining

Influence of chelating agents on cytological exchanges and genetic recombination in Zea mays L.

Creator:: Jones, Donald Dean
Abstract:: The present investigation with the chromosomes of Zea mays was conducted to determine: (1) the effects of chelating agents on the process of cytological exchange, and (2) the effects of chelating agents on genetic recombination. To ascertain the influence of chelating agents on cytological exchange, four known heterozygolis paracentric inversion...
Resource Type:: Dissertation
Full Text:: and genetic recombination in Zea mays L. AN ABSTRACT OF THE THESIS OF DONALD DEAN JONES for the

An analysis of the response to selection for high and low rate of gain in the mouse, Mus musculus

Creator:: Burrill, Melinda Jane
Abstract:: An experiment was conducted to examine the responses to selection for high and low rate of gain in the mouse under a system whereby inbreeding was maximized. Rate of gain was measured by an index designed to include gains in both the pre- and postweaning periods with the gains in...
Resource Type:: Dissertation
Full Text:: and Professor of Animal Genetics, for his great assistance and continued understanding and friendship

Actual and predicted response to selection on maternally influenced traits in the mouse

Creator:: Lind, Ronald Egnard
Abstract:: An experiment was conducted to determine if selection from standardized litters would be effective in separating lines of mice selected for increased and decreased litter weight at 14 days of age, and if response to selection on this maternally influenced trait could be accurately predicted. Data were collected on litter...
Resource Type:: Dissertation
Full Text:: , and weaning over four selected generations. Results of the analyses indicated that, at best, genetic

Association of genetically determined polymorphic blood components with prolificacies of purebred and crossbred pigs

Creator:: Kray, Roger LeRoy
Abstract:: Crossmatings were accomplished among three semi-closed lines within a population of pigs, for the purpose of investigating effects of crossbreeding on reproductive traits. Two of the lines were purebred (Berkshire and Yorkshire); the third line ("Composite") consisted of descendants from inter se matings among offspring of crosses of the Berkshire...
Resource Type:: Dissertation
Full Text:: number of fetuses farrowed at various parities. 114 19 Least squares means and constants for non-genetic

The response of genetically related groups of young beef cattle to administered male hormones

Creator:: Burris, Martin Joe
Resource Type:: Dissertation
Full Text:: Genetics Committee who, directly and indirectly, through their teachings have provided the inspiration

Genetic and environmental factors affecting certain productive characters in sheep

Creator:: McLeroy, G. B. (George B.)
Resource Type:: Dissertation
Full Text:: Genetic and Environmental Factors Affecting Certain

Genetic polymorphism of sheep hemoglobin

Creator:: Templeton, Joe Wayne, 1941-
Abstract:: Five breeds of sheep (Columbia, Targhee, Rambouillet, Lincoln, and Suffolk) were found to possess two hemoglobin types (Hb. A and Hb. B) when their hemoglobins were examined by disc gel electrophoresis. The hemoglobin alleles proved to be co-dominant. Three of the breeds (Columbia, Targhee, and Rambouillet) were maintained at altitudes...
Resource Type:: Dissertation
Full Text:: fleece weight, (11) yearling fleece grade, and (12) yearling index. Genetic Polymorphism of Sheep

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
Full Text:: genetic parameters, and under selection, these para- meters are known to change. Animals selected by use

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:: : GENETIC AND PHYSIOLOGICAL RELATIONSHIPS OF GROWTH HORMONE AND GROWTH IN GOATS Redacted for

ScholarsArchive@OSU

Selection applied, response of traits and combining abilities of inbred lines of beef cattle

Influence of chelating agents on cytological exchanges and genetic recombination in Zea mays L.

An analysis of the response to selection for high and low rate of gain in the mouse, Mus musculus

Actual and predicted response to selection on maternally influenced traits in the mouse

Association of genetically determined polymorphic blood components with prolificacies of purebred and crossbred pigs

The response of genetically related groups of young beef cattle to administered male hormones

Genetic and environmental factors affecting certain productive characters in sheep

Genetic polymorphism of sheep hemoglobin

Effectiveness of index and elite selection methods

Genetic and physiological relationships of growth hormone and growth in goats

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