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Creator:: Sadjadi, Morteza
Resource Type:: Dissertation
Full Text:: . Genetic improvement in poultry might be accomplished more easily and rapidly by selection for single

Creator:: Spiller, Robert James
Abstract:: A series of 8 experiments was conducted to investigate various methods of delaying the sexual maturity of developing White Leghorn (W. L.) pullets grown during a period of increasing day length and to control the feed intake of W. L. layers. In the first five experiments W. L. pullets were...
Resource Type:: Dissertation
Full Text:: degree DOCTOR OF PHILOSOPHY (Name) (Degree) in POULTRY SCIENCE presented on September 4, 1974 (Major

Creator:: Ngam, Joe Eric Tosah
Abstract:: The records of a population of sex-linked dwarf layers at the Oregon State Agricultural Experiment Station subjected to an accelerated selection for hen-housed egg production at 40 weeks of age for a period of over 11 years were analyzed for selection response, and for the estimation of genetic parameters. The...
Resource Type:: Dissertation
Full Text:: The genetic parameters associated with egg production and

Creator:: Cáceres, Oscar
Abstract:: The records of a population of White Leghorns at the Oregon State Agricultural Experiment Station, submitted to accelerated selection for hen-housed egg production on an individual and a family basis at 40 weeks of age for 18 years, were studied. An analysis was made to determine the relative efficiency of...
Resource Type:: Dissertation
Full Text:: - tive in obtaining genetic gains in hen -housed annual production by increasing the part -year or egg

Creator:: Nahashon, Samuel N.
Abstract:: Six experiments were carried out with Single Comb White Leghorn laying chickens to assess the effect of feeding a source of direct-fed microbials (Lactobacillus; Lacto) and its carrier [condensed cane molasses solubles (CCMS)] on the retentions of fat, nitrogen and several minerals; on the status of the pH of the...
Resource Type:: Dissertation
Full Text:: comb white leghorn chickens AN ABSTRACT OF THE THESIS OF Samuel N. Nahashon for the degree of Doctor

Creator:: Huang, Hsuan-Jen
Abstract:: This research was initiated to investigate a high mortality problem occurring in market age broiler chickens in Oregon. Initial field investigations revealed that mortality was due to the systemic bacterial infections. The subsequent laboratory experiments suggested that suppressed short-term, non-specific innate immunity rather than pathogenic properties of bacteria caused the...
Resource Type:: Dissertation
Full Text:: infection in white leghorn chickens AN ABSTRACT OF THE THESIS OF Hsuan-Jen Huang for the degree of Doctor

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