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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

REFERENCES

Allard, R. W. (1975). The Mating System and Microevolution. Genetics, 79, 115–126.Google ScholarPubMed
Angseesing, J. P. A. (1974). Selective eating of the acyanogenic form of Trifolium repens. Heredity, 32, 73–83.CrossRefGoogle Scholar
Angseesing, J. P. A. & Angseesing, W. J. (1973). Field observations on the cyanogenesis polymorphism in Trifolium repens. Heredity, 31, 276–282.CrossRefGoogle Scholar
de Araujo, A. M. (1976). The relationship between altitude and cyanogenesis in white clover (Trifolium repens L.). Heredity, 37, 291–293.CrossRefGoogle Scholar
Atwood, S. S. (1942 a). Oppositiona! alleles causing cross-incompatability in Trifolium repens. Genetics, 27, 333–338.CrossRefGoogle Scholar
Atwood, S. S. (1942 b). Genetics of self-compatability in Trifolium repens. Journal of the American Society of Agronomy, 34, 352–364.CrossRefGoogle Scholar
Atwood, S. S. (1942 c). Genetics of pseudo-self-compatability and its relation to cross-incompatability in Trifolium repens. Journal of Agricultural Research, 64, 699–709.Google Scholar
Atwood, S. S. & Sullivan, J. T. (1943). Inheritance of a cyanogenetic glucoside and its hydrolysing enzyme in Trifolium repens. Journal of Heredity, 34, 311–320.CrossRefGoogle Scholar
Bennett, J. H. & Binet, F. E. (1956). Association between mendelian factors with mixed selfing and random mating. Heredity, 10, 51–55.CrossRefGoogle Scholar
Bishop, J. A. & Korn, M. E. (1969). Natural selection and cyanogenesis in white clover, Trifolium repens. Heredity, 24, 423–430.CrossRefGoogle Scholar
Brown, A. H. D. (1979). Enzyme polymorphism in plant populations. Theoretical Population Biology, 15, 1–42.CrossRefGoogle Scholar
Clegg, M. T. (1980). Measuring plant mating systems. BioScience, 30, 814–818.CrossRefGoogle Scholar
Clegg, M. T., Kahler, A. L. & Allard, R. W. (1978). Estimation of life cycle components of selection in an experimental plant population. Genetics, 89, 765–792.CrossRefGoogle Scholar
Corkill, L. (1943). Cyanogenesis in white clover (Trifolium repens L.). V. The inheritance of cyanogensis. New Zealand Journal of Science and Technology, 23B, 178–193.Google Scholar
Dritschilo, W., Krummel, J., Nafus, D. & Pimentel, D. (1979). Herbivorous insects colonising cyanogenic and acyanogenic Trifolium repens. Heredity, 42, 49–56.CrossRefGoogle Scholar
Ennos, R. A. (1981 a). Detection of selection in populations of white clover (Trifolium repens L.). Biological Journal of the Linnean Society, 15, 75–82.CrossRefGoogle Scholar
Ennos, R. A. (1981 b). Manifold effects of the cyanogenic loci in white clover. Heredity, 46, 127–132.CrossRefGoogle Scholar
Harper, J. L. (1977). Population Biology of Plants. London, Academic Press.Google Scholar
Hendrick, P., Jain, S. & Holden, L. (1978). Multilocus systems in evolution. Evolutionary Biology, 11, 101–184.Google Scholar
Hill, W. G. (1974). Estimation of linkage disequilibrium in randomly mating populations. Heredity, 33, 229–239.CrossRefGoogle ScholarPubMed
Hill, W. G. & Robertson, A. (1968). Linkage disequilibrium in finite populations. Theoretical and Applied Genetics, 38, 226–231.CrossRefGoogle ScholarPubMed
Jones, D. A. (1966). On the polymorphism of cyanogenesis in Lotus corniculatus. Selection by animals. Canadian Journal of Genetics and Cytology, 8, 556–567.CrossRefGoogle Scholar
Karlin, S. & Feldman, M. W. (1970). Linkage and selection: Two-locus symmetric viability model. Theoretical Population Biology, 1, 39–71.CrossRefGoogle ScholarPubMed
Lewontin, R. C. & Kojima, K. (1960). The evolutionary dynamics of complex polymorphisms. Evolution, 14, 458–472.Google Scholar
Miller, J. D., Gibson, P. B., Cope, W. A. & Knight, W. E. (1975). Herbivore feeding on cyanogenic and acyanogenic white clover seedlings. Crop Science, 15, 90–91.CrossRefGoogle Scholar
Nei, M. & Li, W. H. (1973). Linkage disequilibrium in subdivided populations. Genetics, 75, 213–219.CrossRefGoogle ScholarPubMed
Turner, J. R. G. (1968). On supergenes. II. The estimation of gametic excess in natural populations. Genetica, 39, 82–93.CrossRefGoogle ScholarPubMed
Williams, W. (1954). An emasculation technique for certain species of Trifolium. Agronomy Journal, 46, 182–184.CrossRefGoogle Scholar
Zouros, E. & Johnson, W. (1976). Linkage disequilibrium between functionally related enzyme loci of Drosophila mojavensis. Canadian Journal of Genetics and Cytology. 18, 245–254.CrossRefGoogle ScholarPubMed