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Epigenetic induction may speed up or slow down speciation with gene flow.
- Source :
-
Evolution; international journal of organic evolution [Evolution] 2022 Jun; Vol. 76 (6), pp. 1170-1182. Date of Electronic Publication: 2022 May 01. - Publication Year :
- 2022
-
Abstract
- Speciation is less likely to occur when there is gene flow between nascent species. Natural selection can oppose gene flow and promote speciation if there is variation in ecological conditions among the nascent species' locations. Previous theory on ecological speciation with gene flow has focused primarily on the role of genetic variation in ecological traits, largely neglecting the role of nongenetic inheritance or transgenerational plasticity. Here, we build and analyze models incorporating both genetic and epigenetic inheritance, the latter representing a form of nongenetic inheritance. We investigate the rate of speciation for a population that inhabits two patches connected by migration, and find that adaptively biased epigenetic induction can speed up or slow down speciation, depending on the form of the map from genotype and epigenotype to phenotype. While adaptively relevant epigenetic variation can speed up speciation by reducing the fitness of migrants and hybrids, it can also slow down speciation. This latter effect occurs when the epialleles are able to achieve adaptation faster than the genetic alleles, thereby weakening selection on the latter.<br /> (© 2022 The Authors. Evolution published by Wiley Periodicals LLC on behalf of The Society for the Study of Evolution.)
- Subjects :
- Alleles
Epigenesis, Genetic
Genetic Speciation
Phenotype
Gene Flow
Selection, Genetic
Subjects
Details
- Language :
- English
- ISSN :
- 1558-5646
- Volume :
- 76
- Issue :
- 6
- Database :
- MEDLINE
- Journal :
- Evolution; international journal of organic evolution
- Publication Type :
- Academic Journal
- Accession number :
- 35482931
- Full Text :
- https://doi.org/10.1111/evo.14494