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Sympatric Speciation
Abstract
It is shown that in a heterogeneous environment divided into two "niches," a stable polymorphism can exist between two alleles each conferring a selective advantage in one of the niches, even if adults form a single random-mating population, provided: (1) the population size is separately regulated in the two niches, and (2) the selective advantages are large. The conditions to be satisfied are given; it is difficult to say how often they will be satisfied. A stable polymorphism is favored if females tend to lay eggs in the niche in which they were themselves raised. Four genetic mechanisms--habitat selection, pleiotropic genes, modifying genes, and assortative mating genes--which could cause mating isolation are considered. It is concluded that stable polymorphism could be the first stage in sympatric speciation. The relevance of these mechanisms in allopatric speciation is also discussed.
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Citations
Cited by
Isolation with Migration Models for More Than Two Populations
Hey, J. (2010) · Molecular Biology and Evolution · doi:10.1093/molbev/msp296 · Cited by 894
Endler, J. A. (1973) · Science · doi:10.1126/science.179.4070.243 · Cited by 853
PERSPECTIVE: MODELS OF SPECIATION: WHAT HAVE WE LEARNED IN 40 YEARS?
Gavrilets, S. (2003) · Evolution · doi:10.1111/j.0014-3820.2003.tb00233.x · Cited by 587
Speciation by Natural and Sexual Selection: Models and Experiments
Kirkpatrick, M., & Ravigné, V. (2002) · The American Naturalist · doi:10.1086/338370 · Cited by 586
Jiang, Y., Bolnick, D. I., & Kirkpatrick, M. (2013) · The American Naturalist · doi:10.1086/670160 · Cited by 427
Metadata
- Authors
- Smith, J. M.
- Venue
- The American Naturalist
- Publisher
- University of Chicago Press
- Published
- 1966-11
- Volume
- 100
- Issue
- 916
- Pages
- 637-650
- ISSN
- 0003-0147 (ISSN-L)
- 1537-5323
- OpenAlex
- W4251959437
- Cited by
- 758
- References
- 0
- FWCI
- 2.80
- Type
- journal article
- Language
- en
- Open access
- closed
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