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Repeatability of Milk Yield and Birth Weights of Goats in Malaya

I. Milk Yield and Length of Lactation

Published online by Cambridge University Press:  03 October 2008

Anuwar Bin Mahmud  and
C. Devendra
Anuwar Bin Mahmud
Affiliation:
Faculty of Agriculture, University of Malaya
C. Devendra
Affiliation:
College of Agriculture, Malaya, Serdang.
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Summary

Repeatability estimates of milk yield and length of lactation of local, ½ Anglo-Nubian × local and ¾ Anglo-Nubian × local cross-bred goats were calculated. There were highly significant differences in the effect of dams on milk yields for the third, fourth and fifth lactations for local goats, when considered together. No significant differences were found for the first two lactations. For the ½ Anglo-Nubian cross-bred goats significant differences were also found for the first and second lactations, but not for the third lactation. No significant differences were found for the two lactations in the case of the ¾ Anglo-Nubian cross-bred goats. The effect of lactation periods were not significant for the three types of goats. The mean repeatability estimates for local goats were 0·47, 0·42 for ½ Anglo-Nubian and 0·54 for ¾ Anglo-Nubian cross-bred goats, which were comparable to those reported for cattle. The between-dam effect was highly significant when three lengths of lactations were combined in local goats, and the interval between lactations were also significant, but these two effects were not significant for the ½ Anglo-Nubian and ¾ Anglo-Nubian cross-bred goats. The estimates of repeatability for length of lactation averaged 0·29 for local goats, 0·17 for ½ Anglo-Nubian and 0·53 for ¾ Anglo-Nubian cross-bred goats. The correlation coefficients between milk yield and length of lactation were positive and statistically significant for all the three types of goats, ranging from 0·59 to 0·93. The similarity of the genetics of goats to those of cattle and sheep is mentioned.

Type
Research Article
Information
Experimental Agriculture , Volume 2 , Issue 3 , July 1966 , pp. 211 - 216
Copyright
Copyright © Cambridge University Press 1966

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References

REFERENCES

Anuwar Bin, Mahmud (1965). Rep. 13th Ann. Conf., Malaysian Vet. Assoc., Kuala Lumpur.Google Scholar
Devendra, C. (1962). Malay. agric. J. 43, 265.Google Scholar
Devendra, C. (1964). Malay. Agriculturist, 4, 33.Google Scholar
Devendra, C. (1966). Malay. agric. J. (in press).Google Scholar
Falconer, D. S. (1961). Introduction to Quantitative Genetics. New York: Ronald Press.Google Scholar
Mahadevan, P. (1953). Emp. J. exp. Agric. 21, 55.Google Scholar
Mahadevan, P. (1955). J. Dairy Sci. 38, 1231.Google Scholar
Mahadevan, P. (1956). J. Agric. Sci. 48 164.Google Scholar
Mahadevan, P. (1958). Dairy Cattle Breeding in the Tropics. Comm. Agric. Bur. Tech. Comm. 49.Google Scholar
Mason, I. L. (1964). Brit. Coat Soc. Yearb. 58, 3.Google Scholar
Robertson, A. (1950). Conf. on Improvement of Livestock under Tropical Conditions., Edinburgh (Mimeo).Google Scholar
Snedecor, G. W. (1961). Statistical Methods. Ames: Iowa State Univ. Press.Google Scholar
Sikka, L. C. (1931). Indian J. vet. Sci. 1, 63.Google Scholar
Sikka, L. C. (1933). Indian J. vet. Sci. 3, 240.Google Scholar