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Filtering by: Creator Breese, W. P. Remove constraint Creator: Breese, W. P. Contributor advisor sim Bogart, Ralph Remove constraint Contributor advisor sim: Bogart, Ralph

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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

  • Relationship of certain blood nitrogen constituents with growth in different genetic groups of sheep

    Creator:
    Yodseranee, Somchit
    Abstract:
    Market lamb production usually requires a short period of time. The success of production is therefore dependent upon the growth rate of the lambs which is influenced by milk yields of the ewes. Different growth potentials of animals result from a difference in their utilisation of food. Since metabolism affects...
    Resource Type:
    Masters Thesis
    Full Text:
    . Gregory, P. W. and W. E. Castle. Further studies on the embryological basis of size inheritance in the

  • Response of scorbutic guinea pigs to ascorbic acid and adrenocorticotropic hormone (ACTH)

    Creator:
    Riker, Joseph Thaddeus III
    Abstract:
    Thirty-six female guinea pigs were placed on a scorbutogenic diet for 14 days and then divided into groups of four. Three groups received adrenocorticotropic hormone (ACTH) with each group given 10, 20, or 40 units. Three groups each received 50 mg of ascorbic acid and three groups received 50 mg...
    Resource Type:
    Masters Thesis
    Full Text:
    alone there is no difference between the tirne intervaLs, but there is a significant differenc. (p

  • 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:
    W-1 project of the Western States were crossed annually from 1963 through 1965 inclusive. Data on

  • 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

  • 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