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Transferrin (β-globulin) type and milk and butterfat production in dairy cows

Published online by Cambridge University Press:  27 March 2009

G. C. Ashton ,
G. R. Fallon  and
D. N. Sutherland
G. C. Ashton
Affiliation:
Cattle Research Laboratory, C.S.I.B.O., Rockhampton, Queensland; Veterinary School, University of Queensland; and Department of Agriculture and Stock, Brisbane, Queensland
G. R. Fallon
Affiliation:
Cattle Research Laboratory, C.S.I.B.O., Rockhampton, Queensland; Veterinary School, University of Queensland; and Department of Agriculture and Stock, Brisbane, Queensland
D. N. Sutherland
Affiliation:
Cattle Research Laboratory, C.S.I.B.O., Rockhampton, Queensland; Veterinary School, University of Queensland; and Department of Agriculture and Stock, Brisbane, Queensland
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Extract

1. The transferrin types of 225 Jersey cows in thirteen herds, and 433 Australian Illawarra Shorthorn cows in twenty-four herds in Queensland were determined. The effect of transferrin type on lactation length, milk yield, butterfat yield and butterfat percentage was assessed by a leastsquares multiple linear regression analysis.

2. The results for the two breeds did not differ significantly. Combining the data from both breeds, it was found that on average D/D cows had lactations 13·9 days longer than A/A cows (P < 0·01), and yielded 449·7 lb. more mills (P < 0·01). The results for A/D cows were intermediate.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 62 , Issue 1 , February 1964 , pp. 27 - 34
Copyright
Copyright © Cambridge University Press 1964

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