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Shell porosity and shell thickness in inbred lines of brown leghorn fowls

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
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Extract

1. Egg-shells from six inbred lines of Brown Leghorn fowls were examined for porosity and thickness in March and in July.

2. For both characters studied the variation between-line means was found to be significant.

3. The line means for thickness were with a single exception lower in July.

4. Porosity coefficients increased from March to July.

5. No significant relationship between shell thickness and porosity was found in either season. Line differences in porosity values are therefore attributable to variations in other properties of the shell.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 45 , Issue 1 , October 1954 , pp. 28 - 31
Copyright
Copyright © Cambridge University Press 1954

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References

REFERENCES

Almquist, H. J. & Holst, W. F. (1931). Hilgardia, 6, 61.CrossRefGoogle Scholar
Coles, R. (1936). J. Minist. Agric. 43, 317.Google Scholar
Curtis, M. R. (1914). Abstract in Bull. Me Agric. Exp. Sta. no. 228, 1914.Google Scholar
Godfrey, G. & Jaap, G. (1949). Poult. Sci. 28, 874.CrossRefGoogle Scholar
Landauer, W. (1951). Bull. Storrs Agric. Exp. Sta. no. 262.Google Scholar
Marshall, W. & Cruickshank, D. B. (1938). J. Agric. Sci. 28, 24.Google Scholar
Mueller, C. D. & Scott, H. M. (1940). Poult. Sci. 19, 163.Google Scholar
Murray, H. A. (1925). J. Gen. Physiol. 9, 1.Google Scholar
Olsson, Nils (1936). Proc. VIth World's Poult. Congr. Berlin 1936.Google Scholar
Quinn, J. P., Gordon, C. D. & Godfrey, A. B. (1945). Poult. Sci. 24, 399.CrossRefGoogle Scholar
Rauch, W. (1952). Poult. Sci. 31, 589.CrossRefGoogle Scholar
Smith, A. J. M. (1929). Rep. Fd Invest. Bd, Lond., no. 74.Google Scholar
Taylor, L. & Lerner, M. (1939). J. Agric. Res. 58, 383.Google Scholar
Tyler, C. (1945). J. Agric. Sci. 35, 168.Google Scholar
Tyler, C. (1946). J. Agric. Sci. 36, 111.CrossRefGoogle Scholar
Warren, D. C. & Schnepel, R. (1939). Poult. Sci 19, 67.CrossRefGoogle Scholar
Wilhelm, L. A. (1940). Poult. Sci. 19, 246.Google Scholar