Divergent selection for shape of growth curve in Japanese quail. 2. Embryonic development and growth

British Poultry Science
L HyánkováS Horácková

Abstract

1. Embryonic growth and development were analysed using meat type lines of Japanese quail, HG and LG, divergently selected for shape of the growth curve. A total of 1020 embryos of generations 9, 10 or 13 were used for analysis. 2. Considerable inter-line differences were observed in the rate of embryonic development. When compared to HG, LG embryos appeared to be developmentally accelerated during the first 42 h of incubation (larger blastoderm diameter, more somites and higher frequency of more advanced Hamburger-Hamilton stages) as well as at the end of the prenatal period (more embryos with the yolk sac inside the body cavity, shorter incubation period). This corresponded with the trend in postnatal development. 3. Embryonic growth of both lines exhibited an exponential trend. However, considerable inter-line differences were noted in the rate of embryonic growth. Initial growth retardation compensated subsequently by a higher growth rate of HG vs LG quail, characterised the lines after hatching. The same growth pattern repeated three times during the prenatal period (between d 0 and 3, 3 and 8, and 8 and 16). 4. The repeated occurrence of transient decreases in growth rate of the developmentally delayed HG line could be as...Continue Reading

References

May 1, 1978·British Poultry Science·W K Al-Murrani
Nov 1, 1975·Poultry Science·M A Coleman, R A McNabb
Mar 1, 1990·British Poultry Science·T MuramatsuJ Okumura
Jan 1, 1972·Poultry Science·R T Hardin
Aug 1, 1967·Analytical Biochemistry·D J WatsonD B Bartosik
Apr 27, 1999·Zygote : the Biology of Gametes and Early Embryos·A Malewska, B Olszańska
Jul 27, 2001·Poultry Science·S Mignon-GrasteauF H Ricard
Jan 1, 1951·Journal of Morphology·V HAMBURGER, H L HAMILTON

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Citations

Jul 25, 2015·Journal of Experimental Zoology. Part A, Ecological Genetics and Physiology·Veronika JavůrkováLudmila Hyánková
Apr 5, 2020·Veterinary Medicine and Science·Collins AsiamahYing Su

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