Hostname: page-component-78c5997874-m6dg7 Total loading time: 0 Render date: 2024-11-09T07:34:57.053Z Has data issue: false hasContentIssue false
  • English
  • Français

Relations of yolk, albumen and egg weight in inbred lines of brown leghorns

Published online by Cambridge University Press:  27 March 2009

J. E. Erasmus
J. E. Erasmus
Affiliation:
Poultry Research Centre, West Mains Road, Edinburgh and Elsenburg College of Agriculture, Stellenbosch, South Africa
Get access Rights & Permissions [Opens in a new window]

Extract

1. The relations of yolk, albumen and egg weight were studied in seven inbred lines of Brown Leghorns and reciprocal crosses of two of these lines.

2. In all the lines the eggs produced by hens had a bigger proportion of yolk than those produced by pullets.

3. Besides changes in both components accompanying differences in egg size the line means for albumen weight still differ significantly after adjustment is made for its covariance with yolk weight. This independent variation leads to differences in the yolk-albumen ratio of the hens.

4. Within the lines there is a significant negative association between egg size and the yolk/albumen ratio.

5. The wide differences in egg size, dividing the pure lines into two groups characterized by large and small eggs respectively, resulted from a marked decrease in the amount of albumen in the eggs of the latter group. Yolk weights, on the other hand, could be ranked in a fairly regular series with adjacent lines differing by 2 g. or less.

6. There is some source of variation in the yolk/ albumen ratio for line means which is not accounted for by differences in egg size.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 45 , Issue 1 , October 1954 , pp. 32 - 35
Copyright
Copyright © Cambridge University Press 1954

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

Asmundson, V. S. (1933). Proc. Vth World's Poult. Congr. Rome, pp. 1–2, 344.Google Scholar
Asmundson, V. S., Baker, G. A. & Emlen, J. T. (1943). Auk, 60, 34.CrossRefGoogle Scholar
Asmundson, V. S. & Pinsky, P. (1935). Poult. Sci. 14, 99.CrossRefGoogle Scholar
Godfrey, A. B. (1936). Poult. Sci. 15, 294.CrossRefGoogle Scholar
Jull, M. A. (1924). Poult. Sci. 3, 77.CrossRefGoogle Scholar
Olsson, Nils (1936). Proc. VIth World's Poult. Congr. Berlin, pp. 1, 310.Google Scholar
Philpott, D. (1933). Proc. Vth World's Poult. Congr. Rome, pp. 1–2, 479.Google Scholar
Romanoff, A. L. & Romanoff, A. J. (1949). The Avian Egg. New York: John Wiley and Sons, Inc.Google Scholar
Saieh, Y. (1948). Thesis, University of Edinburgh.Google Scholar
Scott, H. M. & Warren, D. C. (1941). Poult. Sci. 20, 75.CrossRefGoogle Scholar