Early embryogenesis in eggs of different weights, from a commercial strain of White Leghorn chickens, was studied. Observations were limited to unincubated blastoderms and embryos after 38 hours of incubation. Large eggs were found to be associated with high frequency of "degenerating" blastoderms as compared to medium and small eggs. Mean width of the unincubated blastoderms was directly related to the egg size. Such a direct relationship was, however, not so obvious in 38-hour embryos, probably because of a high degree of developmental variability associated with large eggs. Embryonic development in medium sized eggs was consistently superior and invariably more uniform. The incidence of early embryonic mortality and abnormal embryogenesis was also higher in large eggs. These results were discussed in light of the observations from eggs subjected to prolonged preincubation storage.
Proceedings of the Iowa Academy of Science
© Copyright 1968 by the Iowa Academy of Science, Inc.
Arora, K. L. and Matsumoto, L. H.
"Early Emhryogenesis in Chicken Eggs of Different Weights,"
Proceedings of the Iowa Academy of Science, 75(1), 405-415.
Available at: https://scholarworks.uni.edu/pias/vol75/iss1/55