Some features of amino acid and lipid metabolism in embryos of meat-type fowl with different yolk weight

Some features of amino acid and lipid metabolism in embryos of meat-type fowl with different yolk... It has been proposed that variations in relative yolk weight in a population of meat-type fowl be used as a model of development of nidicolous and nidifugous birds. During development of the eggs with a high proportion of yolk, an excess of lipids is cleaved at a higher rate and oxidized until day 17 of incubation, while in the embryos developing from the eggs with a low relative yolk weight, amino acids are intensely cleaved during the period preceding the hatching. Significant differences in the body content of cystine were found in 17-day embryos and upon hatching, thus suggesting a delayed activity of the genes encoding keratins in the group corresponding to the seminidicolous type according to the egg content of lipids. These biochemical differences question the widespread concept on the occurrence of dichotomy by the end of embryogenesis and beginning of neonatal growth of nidifugous and nidicolous birds. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Russian Journal of Developmental Biology Springer Journals

Some features of amino acid and lipid metabolism in embryos of meat-type fowl with different yolk weight

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Publisher
Nauka/Interperiodica
Copyright
Copyright © 2005 by MAIK “Nauka/Interperiodica”
Subject
Life Sciences; Developmental Biology; Animal Anatomy / Morphology / Histology
ISSN
1062-3604
eISSN
1608-3326
D.O.I.
10.1007/s11174-005-0001-2
Publisher site
See Article on Publisher Site

Abstract

It has been proposed that variations in relative yolk weight in a population of meat-type fowl be used as a model of development of nidicolous and nidifugous birds. During development of the eggs with a high proportion of yolk, an excess of lipids is cleaved at a higher rate and oxidized until day 17 of incubation, while in the embryos developing from the eggs with a low relative yolk weight, amino acids are intensely cleaved during the period preceding the hatching. Significant differences in the body content of cystine were found in 17-day embryos and upon hatching, thus suggesting a delayed activity of the genes encoding keratins in the group corresponding to the seminidicolous type according to the egg content of lipids. These biochemical differences question the widespread concept on the occurrence of dichotomy by the end of embryogenesis and beginning of neonatal growth of nidifugous and nidicolous birds.

Journal

Russian Journal of Developmental BiologySpringer Journals

Published: Feb 24, 2005

References

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