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Filtering by: Creator Pinchot, Gifford, 1865-1946 Remove constraint Creator: Pinchot, Gifford, 1865-1946 Advisor England, D. C. Remove constraint Advisor: England, D. C. Degree Name Master of Science (M.S.) Remove constraint Degree Name: Master of Science (M.S.)

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  • Relationship of inbreeding to heterosis in swine

    Creator:
    Liu, Lillian Ling-Ling
    Abstract:
    Records of 889 litters of three populations of swine farrowed between 1962 and 1973 were analyzed by least squares procedures. Estimates were obtained for the effects of age and inbreeding of dam, inbreeding of litter, inbreeding of dam's dam and inbreeding of the sire of the litter on litter size...
    Resource Type:
    Masters Thesis
    Full Text:
    than were inbred litters. These are in close agreement with Dickerson et al. (1946), Hetzer et al

  • Evaluation of responses to selection and association among specific traits in three populations of swine

    Creator:
    Smith, Edward J. M. S.
    Abstract:
    Oregon State University swine herd records of 456 litters farrowed between 1962-73 in three populations were analyzed on a generation basis to compare changes in performance of a Composite population to parental Berkshire and Yorkshire breeds. Analysis was performed in six discrete and overlapping generations on backfat thickness, loin eye...
    Resource Type:
    Masters Thesis
    Full Text:
    gain than barrows. Within Yorkshire pigs, Bennett and Coles (1946) revealed that gilts took longer to