Abstract
We consider whether the fixation probability of an allele in a two-allele diploid system is always a monotonic function of the selective advantage of the allele. We show that while this conjecture is correct for intermediate dominance, it is not correct in general for either overdominant or underdominant alleles, and that for some parameter ranges the fixation probability can initially decrease and then increase as a function of the amount of selection. We have partial results that characterize the ranges of parameters for which this happens.
Similar content being viewed by others
References
Carr R.N. and Nassar R.F. (1970). Effects of selection and drift on the dynamics of finite populations. Biometrics 26: 41–49
Crow J. and Kimura M. (1970). An Introduction to Population Genetics Theory. Harper and Row, New York
Ewens W.J. (2004). Mathematical Population Genetics I. Theoretical Introduction. Springer, New York
Ewens W.J. and Thomson C. (1970). Heterozygote selective advantage. Ann. Hum. Genet. 33: 365–376
Fisher R.A. (1922). On the dominance ratio. Proc. R. Soc. Edinb. 42: 321–341
Fisher R.A. (1930). The distribution of gene ratios for rare mutations. Proc. R. Soc. Edinb. 50: 204–219
Fisher R.A. (1930). The Genetical Theory of Natural Selection. Clarendon Press, Oxford
Hartl D.L. and Clark A.G. (1997). Principles of Population Genetics. Sinauer Associates, Sunderland
Kimura M. (1962). On the probability of fixation of mutant genes in a population. Genetics 47: 713–719
Magori K. and Gould F. (2006). Genetically engineered underdominance for manipulation of pest populations: a deterministic model. Genetics 172: 2613–2620
Malécot G. (1952). Les processus stochastiques et la méthode des fonctions génératrices ou caractéristiques. Publ. Inst. Stat. Univ. Paris 1, Fasc 3: 1–116
Nei M. and Roychoudhury A.K. (1973). Probabiility of fixation and mean fixation time of an overdominant mutation. Genetics 74: 371–380
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Chen, C.T.L., Chi, QS. & Sawyer, S.A. Effects of dominance on the probability of fixation of a mutant allele. J. Math. Biol. 56, 413–434 (2008). https://doi.org/10.1007/s00285-007-0121-7
Received:
Revised:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s00285-007-0121-7