Data from 592 litters of pigs farrowed and raised at the
Oregon Agricultural Experiment Station at Corvallis from the spring
of 1961 through the spring of 1968 were analyzed for effects of year
and season of birth, breed, sex, inbreeding and age of dam on
measures of fecundity, growth rate...
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...
The investigations were based on a complete diallel cross
among three inbred lines of Suffolk sheep. Line of sire effects were
assumed to be an estimate of general combining ability effects while
sire x dam interaction was assumed to be an estimate of specific
combining ability. The line of dam...
The studies described here introduce a model for residue preservation on stone tools. They simulate stone tool manufacture in order to define parameters important for the study of DNA residues. Microscopic examination of stone tools has identified microcracks that trap DNA and protein from animal blood cells. Thorough investigation of...
Maize defective kernel (dek) mutants identify genes necessary for the
successful passage of embryos through the embryogenic and maturation
phases of embryo development. The goal of this thesis was to characterize the
developmental potential of three dek mutants that appeared to be
morphologically blocked prior to the maturation phase of...
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...