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Optimum selection intensities in artificial selection programmes: an experimental evaluation

Published online by Cambridge University Press:  14 April 2009

R. Frankham
R. Frankham
Affiliation:
Institute of Animal Genetics, West Mains Boad, Edinburgh EH9 3JN

Summary

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An experimental evaluation of Robertson's (1970) theory concerning optimum intensities of selection for selection of varying durations has been carried out using published results from a long term selection study in Drosophila. Agreement of predicted rankings of treatments with expectations was excellent for low values of t/T (generations/total number scored) but poor for larger values of t/T. This was due to the 20% selection intensity treatments responding worse than expected and the 40% treatments relatively better than expected. Several possible reasons for the discrepancies exist but the most likely explanation is considered to be the greater reduction in effective population size due to selection in treatments with more intense selection.

Type
Research Article
Information
Genetics Research , Volume 30 , Issue 2 , October 1977 , pp. 115 - 119
Copyright
Copyright © Cambridge University Press 1977

References

REFERENCES

Crow, J. F. & Morton, N. E. (1955). Measurement of gene frequency drift in small populations. Evolution 9, 202–214.CrossRefGoogle Scholar
Davies, R. W. (1971). The genetic relationship of two quantitative characters in Drosophila melanogaster. II. Location of the effects. Genetics 69, 363–375.CrossRefGoogle ScholarPubMed
Frankham, R., Jones, L. P. & Barker, J. S. F. (1968 a). The effects of population size and selection intensity in selection for a quantitative character in Drosophila. I. Short-term response to selection. Genetical Research 12, 237–248.Google Scholar
Frankham, R., Jones, L. P. & Barker, J. S. F. (1968 b). The effects of population size and selection intensity in selection for a quantitative character in Drosophila. III. Analyses of the lines. Genetical Research 12, 267–283.CrossRefGoogle Scholar
Jones, L. P., Frankham, R. & Barker, J. S. F. (1968). The effects of population size and selection intensity in selection for a quantitative character in Drosophila. II. Long-term response to selection. Genetical Research 12, 249–266.Google Scholar
MacMillan, I. & Robertson, A. (1974). The power of methods for the detection of major genes affecting quantitative characters. Heredity 32, 349–356.CrossRefGoogle Scholar
Robertson, A. (1960). A theory of limits in artificial selection. Proceedings of the Royal Society of London B 153, 234–249.Google Scholar
Robertson, A. (1961). Inbreeding in artificial selection programmes. Genetical Research 2, 189–194.CrossRefGoogle Scholar
Robertson, A. (1970). Some optimum problems in individual selection. Theoretical Population Biology 1, 120–127.CrossRefGoogle ScholarPubMed
Ruano, R. G., Orozco, F. & López-Fanjul, C. (1975). The effect of different selection intensities on selection response in egg laying of Tribolium castaneum. Genetical Research 25, 17–27.Google Scholar
Smith, C. (1969). Optimum selection procedures in animal breeding. Animal Production 11, 433–442.Google Scholar