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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

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:: male normal goats decreased significantly (P < .005) while serum GH levels in the male pygmy goats

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:: in percent calves born and weaned (P < . 01). All other preweaning and weaning traits did not

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:: . To Dr. W. P. Gregory for providing data on the dwarf animals and for valuable suggestions. To Drs

Effect of certain blood enzymes and cellular constituents on growth in different genetic groups of sheep

Creator:: Hutto, Daniel C.
Abstract:: In the present study, five breeds of ewes and their lambs were utilized. The breeds used were: Border Cheviot, Dorset Horn, Columbia, Suffolk and Willamette. In all, 31 ewes and 42 lambs were involved. The blood constituents which were determined for the ewes and lambs were: acid and alkaline phosphatase,...
Resource Type:: Dissertation
Full Text:: statistically (P <.01) by breed, sex and period, and ewe values were affected (P<.01) by breed, period and

Genetics of sheep transferrins as determined by disc electrophoresis

Creator:: Nix, Carroll Eugene
Abstract:: A total of 902 plasma samples from the Rambouillet, Targhee, Columbia, Lincoln, and Suffolk breeds of sheep were analyzed for transferrin type by disc electrophoresis. Six transferrin types, Tf[superscript A], Tf[superscript B], Tf[superscript C], Tf[superscript p], Tf[superscript E], and Tf[superscript P], were found in the Rambouillet, Targhee, and Columbia breeds...
Resource Type:: Dissertation
Full Text:: . In a mixture of the sera of the two homozygotes, p-globulin C and D, the electrophoretic pattern of

Hormonal stimulation of breeding activity in different genetic groups of ewe lambs

Creator:: West, Dennis Errol, 1942-
Abstract:: An investigation of the effects of exogenous gonadotropic treatments on fertility of various genetic groups of ewe lambs were run over a six-year period. Since hormonal treatments varied and the experimental animals were different from one breeding season to the next, each year comprised a separate study. Hormone treatment included...
Resource Type:: Dissertation
Full Text:: ewe lamb fertility (P<0. 01). This significance was not due to a high positive correlation between

Certain genetic and maternal environmental influences on growth rate and body composition of lambs

Creator:: Addleman, Albert Duane
Abstract:: The present study was designed to investigate the relationship of milk production and milk quality to growth rate and certain organ-oleptic measurements of lambs of mutton breeds, Nine mature ewes in their fourth lactation of the Border Cheviot, Dorset Horn, Columbia, Suffolk, and Willamette breeds were acquired making a total...
Resource Type:: Dissertation
Full Text:: _ ritle_clrBT- INGENE-rr_c_{\r_D}44]P&N!LLlI}vrRoNME}T',r+L___ TNFLrJEI c_EroNGRowrH_RA

A comparison of metabolism of rapidly and slowly gaining beef cattle

Creator:: MacDonald, Malcolm Allan
Resource Type:: Dissertation
Full Text:: M. Williams and George E. Neims, Graduate Assistants, Mrs. P. Touchie and John Kaufmes

Changes in certain blood constituents associated with growth and development of young beef cattle

Creator:: Williams, Charles Melville
Resource Type:: Dissertation
Full Text:: extract, Fvans, Simpson end LI. (38, p.71) demonstrated quite weil that in the rat high dosage of the

ScholarsArchive@OSU

Effectiveness of index and elite selection methods

Genetic and physiological relationships of growth hormone and growth in goats

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

Electrocardiograms and related variables of dwarf beef cattle

Effect of certain blood enzymes and cellular constituents on growth in different genetic groups of sheep

Genetics of sheep transferrins as determined by disc electrophoresis

Hormonal stimulation of breeding activity in different genetic groups of ewe lambs

Certain genetic and maternal environmental influences on growth rate and body composition of lambs

A comparison of metabolism of rapidly and slowly gaining beef cattle

Changes in certain blood constituents associated with growth and development of young beef cattle

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