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Journal of Dairy Science Vol. 41 No. 8 1061-1064
© 1958 by American Dairy Science Association ®
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An Intra-Herd Contemporary Comparison of the Production of Artificially and Naturally Sired Dairy Cows in Georgia1

E. W. Hahn2, J. L. Carmon and W. J. Miller

Dairy Department, University of Georgia, Athens

ABSTRACT

Milk production, fat production, and fat percentage data from 715 Dairy Herd Improvement Association records, of Holstein, Guernsey, and Jersey cattle were studied to estimate the amount of genetic change resulting from the artificial breeding program as compared to the natural breeding program in Georgia. The contemporary comparison method was utilized on a within breed, herd, season and year basis.

The A. I. Holsteins produced a significantly higher percentage of fat (0.16%) than their N. I. contemporaries. No other differences were significant.

FOOTNOTES

1 Journal Paper No. 57 of the Georgia Agricultural Experiment Station.

2 Present address—Department of Dairy Science, University of Illinois, Urbana.






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Copyright © 1958 by the American Dairy Science Association ®.