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Association of the cyanogenic loci in white clover

Published online by Cambridge University Press:  14 April 2009

Richard A. Ennos
Richard A. Ennos
Affiliation:
Department of Genetics, University of Newcastle, Newcastle upon Tyne NE1 7RU
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Summary

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The inheritance of cyanogenesis in Trifolium repens is governed by two unlinked genes, Ac/ac and Li/li which determine the presence/absence of cyanogenic glucosides and their hydrolysing enzyme linamarase respectively. Plants possessing dominant alleles at both loci release hydrogen cyanide when their leaves are damaged. Analysis of phenotype frequencies in ten natural populations showed a significant positive association in phenotypic state between these two loci within populations. Taking into account the results of a subsidiary study which showed no significant deviation from random mating in a natural population of T. repens, the most likely explanation for the observed association in phenotypic state is selection favouring the cyanogenic phenotype.

Type
Research Article
Information
Genetics Research , Volume 40 , Issue 1 , August 1982 , pp. 65 - 72
Copyright
Copyright © Cambridge University Press 1982

References

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