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Evidence for phenotypic change at the amylase I locus in cattle—an explanation of the apparent heterozygote excess

Published online by Cambridge University Press:  02 September 2010

A. L. Archibald ,
J. S. Bradley  and
R. L. Spooner
A. L. Archibald
Affiliation:
ARC Animal Breeding Research Organisation, West Mains Road, Edinburgh EH9 3JQ
J. S. Bradley
Affiliation:
ARC Animal Breeding Research Organisation, West Mains Road, Edinburgh EH9 3JQ
R. L. Spooner
Affiliation:
ARC Animal Breeding Research Organisation, West Mains Road, Edinburgh EH9 3JQ
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Abstract

The amylase (Ami) phenotypes have been determined in sera collected from 244 heifers before 6 months and after 2 years of age. Fifty of these animals exhibited a change in phenotype from Ami C to an apparent Ami BC with age. Using a modified electrophoretic technique these apparent heterozygotes were reclassified as Ami C(E). Eight hundred and nineteen cows, which had previously been shown to have a highly significant excess of heterozygotes at the Ami locus, were also retyped by this modified technique. The apparent heterozygote excess was not found as it was now possible to differentiate between Ami C(E) and Ami BC.

Type
Research Article
Information
Animal Production , Volume 28 , Issue 3 , June 1979 , pp. 337 - 345
Copyright
Copyright © British Society of Animal Science 1979

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References

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