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A computer model of speciation by founder effects

Published online by Cambridge University Press:  14 April 2009

B. Charlesworth  and
D. B. Smith
B. Charlesworth
Affiliation:
School of Biological Sciences, University of Sussex, Brighton BN1 9QG
D. B. Smith
Affiliation:
School of Biological Sciences, University of Sussex, Brighton BN1 9QG
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Summary

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A computer model of a two-locus genetic system with epistatic selection was used to investigate factors influencing the probability of the origin of reproductive isolation, due to a genetic revolution following a founder event (Mayr, 1954; Carson, 1975). Restricted population size can sometimes cause such a system to drift from one equilibrium to another, which can result in loss of fitness to hybrids with the ancestral population. The chance of such an event was found to be low unless the bottleneck in population size associated with the founder event was preceded by many generations of relaxed selection. It is highest when the bottleneck is not prolonged and when the population size during the bottleneck is not too small. It seems to be difficult to achieve a high degree of reproductive isolation in one step by this method, and it is concluded that it is unlikely to be a major cause of rapid speciation, although it could be a contributory factor.

Type
Research Article
Information
Genetics Research , Volume 39 , Issue 3 , June 1982 , pp. 227 - 236
Copyright
Copyright © Cambridge University Press 1982

References

REFERENCES

Avery, P. J. (1978). The effects of finite population size on models of linked overdominant loci. Genetical Research 31, 239–254.Google Scholar
Avery, P. J. & Hill, W. G. (1979). Distribution of linkage disequilibrium with selection and finite population size. Genetical Research 33, 29–48.Google Scholar
Avise, J. C. (1977). Genic heterozygosity and the rate of speciation. Paleobiology 3, 422–432.CrossRefGoogle Scholar
Bengtsson, B. O. & Bodmer, W. F. (1976). On the increase of chromosome mutations under random mating. Theoretical Population Biology 9, 260–281.CrossRefGoogle ScholarPubMed
Carson, H. L. (1968). The population flush and its consequences. In Population Biology and Evolution (ed. Lewontin, R. C.), pp. 123–137. Syracuse, N.Y.: Syracuse University Press.Google Scholar
Carson, H. L. (1970). Chromosome tracers of the origin of species. Science 168, 1414–1418.CrossRefGoogle ScholarPubMed
Carson, H. L. (1975). The genetics of speciation at the diploid level. American Naturalist 109, 83–92.Google Scholar
Craddock, E. M. & Johnson, W. E. (1979). Genetic variation in Hawaiian Drosophila. V. Chromosomal and allozymic diversity in Drosophila silvestris and its homosequential species. Evolution 33, 137–155.Google Scholar
Dobzhansky, T. (1951). Genetics and the Origin of Species. New York: Columbia University Press.Google Scholar
Felsenstein, J. (1974). Uncorrelated genetic drift of gene frequencies and linkage disequilibrium in some models of linked overdominant polymorphisms. Genetical Research 24, 281–294.Google Scholar
Franklin, I. & Lewontin, R. C. (1970). Is the gene the unit of selection ? Genetics 65, 707–734.CrossRefGoogle ScholarPubMed
Gould, S. J. & Eldredge, N. (1977). Punctuated equilibria: the tempo and mode of evolution reconsidered. Paleobiology 3, 115–151.CrossRefGoogle Scholar
Kaneshiro, K. (1976). Ethological isolation and phylogeny in the planitibia subgroup of Hawaiian Drosophila. Evolution 30, 740–745.CrossRefGoogle ScholarPubMed
Lande, R. (1979). Effective deme sizes during long-term evolution estimated from rates of chromosomal rearrangement. Evolution 33, 234–251.CrossRefGoogle ScholarPubMed
Lande, R. (1980). Genetic variation and phenotypic evolution during allopatric speciation. American Naturalist 116, 463–479.CrossRefGoogle Scholar
Lande, R. (1981). Models of speciation by sexual selection on polygenic traits. Proceedings of the National Academy of Sciences, U.S.A. 78, 3721–3725.CrossRefGoogle ScholarPubMed
Lewontin, R. C. (1974). The Genetic Basis of Evolutionary Change. New York: Columbia University Press.Google Scholar
Lewontin, R. C. & Kojima, K-I. (1960). The evolutionary dynamics of complex polymorphisms. Evolution 14, 458–472.Google Scholar
Mayr, E. (1942). Systematics and the Origin of Species. New York: Columbia University Press.Google Scholar
Mayr, E. (1954). Change of genetic environment and evolution. In Evolution as a process (eds. Huxley, J. S., Hardy, A. C. & Ford, E. B.), pp. 157–180. London: Allen & Unwin.Google Scholar
Mayr, E. (1963). Animal Species and Evolution. Cambridge, Mass: Harvard University Press.CrossRefGoogle Scholar
Mukai, T., Cardellino, R. A., Watababe, T. K. & Crow, J. F. (1974). The genetic variance for viability and its components in a local population of Drosophila melanogaster. Genetics 78, 1195–1208.Google Scholar
Muller, H. J. (1940). Bearings of the Drosophila work on systematics. In The New Systematics (ed. Huxley, J. S.), pp. 185–268. London: Systematics Association.Google Scholar
Slatkin, M. (1981). Fixation probabilities and fixation times in a subdivided population. Evolution 35, 477–488.CrossRefGoogle Scholar
Stanley, S. M. (1979). Macroevolution: Pattern and Process. San Francisco: W. H. Freeman.Google Scholar
Templeton, A. R. (1980 a). The theory of speciation via the founder principle. Genetics 94, 1011–1038.Google Scholar
Templeton, A. R. (1980 b). Modes of speciation and inferences based on genetic distances. Evolution 34, 719–729.CrossRefGoogle ScholarPubMed
Wills, C. J. (1977). A mechanism for rapid allopatric speciation. American Naturalist 111, 603–605.Google Scholar
Wright, S. (1932). The roles of mutation, inbreeding, crossbreeding and selection in evolution. Proceedings of the 6th International Congress of Genetics, 1, 356–366.Google Scholar
Wright, S. (1941). On the probability of fixation of reciprocal translocations. American Naturalist 75, 513–522.Google Scholar
Wright, S. (1978). Review of Modes of Speciation (M. J. D. White). Paleobiology 4, 373–379.Google Scholar