COMPARING MATE QUALITY BETWEEN PROVEN AND UNPROVEN DAIRY BULLS
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Published:1989-03-01
Issue:1
Volume:69
Page:57-60
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ISSN:0008-3984
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Container-title:Canadian Journal of Animal Science
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language:en
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Short-container-title:Can. J. Anim. Sci.
Author:
McEWEN P. L.,SCHAEFFER L. R.
Abstract
Holstein service sire information was obtained from Eastern Breeders Incorporated to compare mate quality between proven and unproven sires. Proven sires were mated to females having higher conformation scores for final classification, mammary system, feet and legs and rump. Size score of mates favored unproven bulls. Advantages in mate estimated transmitting ability value for milk and fat index favored proven sires by 0.60 and 0.63 BCA points, respectively. In general, the difference in mate quality between the two sire groups was relatively small. However, proven sires showed a slight advantage in mate quality for the majority of traits studied. Key words: Dairy, sire, mate
Publisher
Canadian Science Publishing
Subject
Animal Science and Zoology,Food Animals