Abstract
Summary
The level of parthenogenesis was determined in unfertilized eggs of 2 similar groups of unselected Beltsville Small White turkeys. Birds of one group were re-vaccinated for fowl pox (live virus) at approximately 36 weeks of age. The others serving as controls had received only one vaccination when 6-8 weeks of age. The treated group produced 1091 eggs and the controls 1099 eggs during the 90-day test period. Approximately 28% of the eggs from the treated group and about 17% of the control group underwent some degree of parthenogenetic development during 10 days of incubation. Twenty-four embryos (2.7%) were encountered in eggs of the treated hens as compared to 4 (0.36%) in eggs of the controls.
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