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Apparent heterozygote excess at the amylase I locus in cattle

Published online by Cambridge University Press:  02 September 2010

R. L. Spooner ,
N. K. Mazumder ,
T. K. Griffin ,
R. G. Kingwill ,
W. V. S. Wijeratne  and
C. D. Wilson
R. L. Spooner
Affiliation:
ARC Cattle Blood Typing Service, Animal Breeding Research Organisation, West Mains Road, Edinburgh EH9 3JQ
N. K. Mazumder
Affiliation:
ARC Cattle Blood Typing Service, Animal Breeding Research Organisation, West Mains Road, Edinburgh EH9 3JQ
T. K. Griffin
Affiliation:
National Institute for Research in Dairying, Shinfield, Reading RG2 9AT
R. G. Kingwill
Affiliation:
National Institute for Research in Dairying, Shinfield, Reading RG2 9AT
W. V. S. Wijeratne
Affiliation:
Ministry of Agriculture, Fisheries and Food, ADAS Central Veterinary Laboratory, New Haw, Weybridge, Surrey
C. D. Wilson
Affiliation:
Ministry of Agriculture, Fisheries and Food, ADAS Central Veterinary Laboratory, New Haw, Weybridge, Surrey
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Summary

The amylase (Am I) genotypes have been determined in sera from 834 cows comprising 562 Friesians, 77 Ayrshires, 106 Guernseys, 62 Jerseys and 27 crossbred cows. All of these cows had completed their third lactation and many were much older. There was a highly significant excess of heterozygotes at the Am I locus. This excess of heterozygotes was highest in high-yielding Friesian herds and there was a significant correlation between percentage heterozygotes and herd yield in the Friesians.

Type
Research Article
Information
Animal Production , Volume 16 , Issue 3 , June 1973 , pp. 209 - 214
Copyright
Copyright © British Society of Animal Science 1973

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References

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