J. Anim Sci.
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J. Anim Sci. 1965. 24:313-318.
© 1965 American Society of Animal Science
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Cattle Transferrins and Their Relation to Fertility and Milk Production1

S. P. Datta2, W. H. Stone, W. J. Tyler and M. R. Irwin

University of Wisconsin, Madison

Abstract

Transferrin types of 473 Holstein-Friesian cattle of two herds were determined. The observed and expected distribution of transferrin types closely agreed in one herd, whereas in the other there was a nonsignificant excess of heterozygotes. Normal segregation ratios were observed among offspring from 212 matings, except for a nearly significant excess of A/A offspring from matings of one A/A bull to A/D dams. We do not know the explanation for this discrepancy. Analysis of first lactation production records of 215 cows did not show an association between transferrins and either milk yield or percent butterfat. However, there was a definite tendency for TfD/TfD cows to have a slightly higher average milk yield than cows of the other genotypes. The results of 686 inseminations were randomly distributed among matings involving the various transferrin groups, suggesting that the transferrin locus does not affect fertility.

Footnotes

1 Paper from the Division of Genetics No. 1023 and the Department of Dairy Science, published with the approval of the Director of the Agricultural Experiment Station. This research was supported in part by a Public Health Service Research Grant (AI 03204) from the National Institute of Allergy and Infectious Diseases. The authors thank L. E. Casida and P. M. Conneally for invaluable help with various phases of this work. Thanks are due to Vince Sasche, E. Zehner and Kent McLaughlin, who collected the blood and recorded much of the data.

2 Present address: Department of Pathology, Monash University Medical School, Alfred Hospital, Prahran, Victoria, Australia.






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Copyright © 1965 by the American Society of Animal Science.