Sexual imprinting leads to speciation in locally adapted populations
Abstract Sexual imprinting is widespread in birds and other species but its existence requires explanation. Our results suggest that sexual imprinting leads to speciation in locally‐adapted populations if a neutral mating cue—e.g., novel plumage coloration—arises through mutation. Importantly, the m...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
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Wiley
2022-11-01
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| Series: | Ecology and Evolution |
| Subjects: | |
| Online Access: | https://doi.org/10.1002/ece3.9479 |
| _version_ | 1811211911138639872 |
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| author | Richard M. Sibly Robert N. Curnow |
| author_facet | Richard M. Sibly Robert N. Curnow |
| author_sort | Richard M. Sibly |
| collection | DOAJ |
| description | Abstract Sexual imprinting is widespread in birds and other species but its existence requires explanation. Our results suggest that sexual imprinting leads to speciation in locally‐adapted populations if a neutral mating cue—e.g., novel plumage coloration—arises through mutation. Importantly, the mating cue locus is not linked to adaptation loci. Local adaptation is a necessary precursor to speciation and occurs when evolution results in stable genetic polymorphisms with one allele predominating in some areas while others predominate elsewhere. Here we use a deterministic two‐niche population genetic model to map the set of migration and selection rates for which polymorphic evolutionary outcomes, i.e., local adaptations, can occur. Approximate equations for the boundaries of the set of polymorphic evolutionary outcomes were derived by Bulmer (American Naturalist, 106, 254, 1972), but our results, obtained by deterministic simulation of the evolutionary process, show that one of Bulmer's equations is inaccurate except when the level of dominance is 0.5, and fails if one of the alleles is dominant. Having an accurate map of the set of migration and selection rates for which polymorphic evolutionary outcomes can occur, we then show using the model of Sibly et al. (Ecology and Evolution, 9, 13506, 2019) that local adaptation in all analyzed cases leads to speciation if a new neutral mating cue arises by mutation. We finish by considering how genome sequencing makes possible testing our model and its predictions. |
| first_indexed | 2024-04-12T05:20:18Z |
| format | Article |
| id | doaj.art-789e7c5b3a2b46f8be945701ac04c237 |
| institution | Directory Open Access Journal |
| issn | 2045-7758 |
| language | English |
| last_indexed | 2024-04-12T05:20:18Z |
| publishDate | 2022-11-01 |
| publisher | Wiley |
| record_format | Article |
| series | Ecology and Evolution |
| spelling | doaj.art-789e7c5b3a2b46f8be945701ac04c2372022-12-22T03:46:29ZengWileyEcology and Evolution2045-77582022-11-011211n/an/a10.1002/ece3.9479Sexual imprinting leads to speciation in locally adapted populationsRichard M. Sibly0Robert N. Curnow1School of Biological Sciences University of Reading Reading UKDepartment of Mathematics and Statistics University of Reading Reading UKAbstract Sexual imprinting is widespread in birds and other species but its existence requires explanation. Our results suggest that sexual imprinting leads to speciation in locally‐adapted populations if a neutral mating cue—e.g., novel plumage coloration—arises through mutation. Importantly, the mating cue locus is not linked to adaptation loci. Local adaptation is a necessary precursor to speciation and occurs when evolution results in stable genetic polymorphisms with one allele predominating in some areas while others predominate elsewhere. Here we use a deterministic two‐niche population genetic model to map the set of migration and selection rates for which polymorphic evolutionary outcomes, i.e., local adaptations, can occur. Approximate equations for the boundaries of the set of polymorphic evolutionary outcomes were derived by Bulmer (American Naturalist, 106, 254, 1972), but our results, obtained by deterministic simulation of the evolutionary process, show that one of Bulmer's equations is inaccurate except when the level of dominance is 0.5, and fails if one of the alleles is dominant. Having an accurate map of the set of migration and selection rates for which polymorphic evolutionary outcomes can occur, we then show using the model of Sibly et al. (Ecology and Evolution, 9, 13506, 2019) that local adaptation in all analyzed cases leads to speciation if a new neutral mating cue arises by mutation. We finish by considering how genome sequencing makes possible testing our model and its predictions.https://doi.org/10.1002/ece3.9479assortative matinggenetic polymorphismmigration selection balanceparapatric speciationsexual imprinting |
| spellingShingle | Richard M. Sibly Robert N. Curnow Sexual imprinting leads to speciation in locally adapted populations Ecology and Evolution assortative mating genetic polymorphism migration selection balance parapatric speciation sexual imprinting |
| title | Sexual imprinting leads to speciation in locally adapted populations |
| title_full | Sexual imprinting leads to speciation in locally adapted populations |
| title_fullStr | Sexual imprinting leads to speciation in locally adapted populations |
| title_full_unstemmed | Sexual imprinting leads to speciation in locally adapted populations |
| title_short | Sexual imprinting leads to speciation in locally adapted populations |
| title_sort | sexual imprinting leads to speciation in locally adapted populations |
| topic | assortative mating genetic polymorphism migration selection balance parapatric speciation sexual imprinting |
| url | https://doi.org/10.1002/ece3.9479 |
| work_keys_str_mv | AT richardmsibly sexualimprintingleadstospeciationinlocallyadaptedpopulations AT robertncurnow sexualimprintingleadstospeciationinlocallyadaptedpopulations |