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Herd size and its genetical significance in pedigree cattle breeding

Published online by Cambridge University Press:  27 March 2009

H. P. Donald  and
A. A. El Itriby
H. P. Donald
Affiliation:
Institute of Animal Genetics, University of Edinburgh
A. A. El Itriby
Affiliation:
Institute of Animal Genetics, University of Edinburgh
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Extract

The average numbers of females of all ages (herd size) in pedigree herds of Jerseys, Guernseys, and Red Polls in 1939 were found to be 25, 22 and 42 respectively. Of the herds listed, 15–20% made no herdbook entries and were of much smaller than average size. Excluding these, the average numbers become 29, 26 and 49. The number of females entered in the herdbook during 1939 was about 20% of the total number of females of all ages. The same proportion was found in all herd size groups except the smallest where it was lower. As a general guide, therefore, to breed and regional differences in herd size in all the major breeds, the average number of herdbook entries of females has been multiplied by 5.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 35 , Issue 2 , April 1945 , pp. 84 - 94
Copyright
Copyright © Cambridge University Press 1945

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