Modeling the two-locus architecture of divergent pollinator adaptation: how variation in SAD paralogs affects fitness and evolutionary divergence in sexually deceptive orchids
- Publikationstyp:
- Zeitschriftenaufsatz
- Metadaten:
-
- Autoren
- Shuqing Xu
- Philipp M Schlueter
- Autoren-URL
- https://www.webofscience.com/api/gateway?GWVersion=2&SrcApp=fis-test-1&SrcAuth=WosAPI&KeyUT=WOS:000348853300022&DestLinkType=FullRecord&DestApp=WOS_CPL
- DOI
- 10.1002/ece3.1378
- Externe Identifier
- Clarivate Analytics Document Solution ID: CA4DB
- PubMed Identifier: 25691974
- ISSN
- 2045-7758
- Ausgabe der Veröffentlichung
- 2
- Zeitschrift
- ECOLOGY AND EVOLUTION
- Schlüsselwörter
- Divergent selection
- ecological speciation
- molecular basis of adaptation
- plant fitness
- plant-pollinator interaction
- sexually deceptive orchids
- speciation genes
- stearoyl-ACP desaturases
- Paginierung
- 493 - 502
- Datum der Veröffentlichung
- 2015
- Status
- Published
- Titel
- Modeling the two-locus architecture of divergent pollinator adaptation: how variation in <i>SAD</i> paralogs affects fitness and evolutionary divergence in sexually deceptive orchids
- Sub types
- Article
- Ausgabe der Zeitschrift
- 5
Datenquelle: Web of Science (Lite)
- Andere Metadatenquellen:
-
- Abstract
- <jats:title>Abstract</jats:title><jats:p>Divergent selection by pollinators can bring about strong reproductive isolation via changes at few genes of large effect. This has recently been demonstrated in sexually deceptive orchids, where studies (1) quantified the strength of reproductive isolation in the field; (2) identified genes that appear to be causal for reproductive isolation; and (3) demonstrated selection by analysis of natural variation in gene sequence and expression. In a group of closely related <jats:italic>Ophrys</jats:italic> orchids, specific floral scent components, namely <jats:italic>n</jats:italic>‐alkenes, are the key floral traits that control specific pollinator attraction by chemical mimicry of insect sex pheromones. The genetic basis of species‐specific differences in alkene production mainly lies in two biosynthetic genes encoding stearoyl–acyl carrier protein desaturases (<jats:styled-content style="fixed-case">SAD</jats:styled-content>) that are associated with floral scent variation and reproductive isolation between closely related species, and evolve under pollinator‐mediated selection. However, the implications of this genetic architecture of key floral traits on the evolutionary processes of pollinator adaptation and speciation in this plant group remain unclear. Here, we expand on these recent findings to model scenarios of adaptive evolutionary change at <jats:italic><jats:styled-content style="fixed-case">SAD</jats:styled-content>2</jats:italic> and <jats:italic><jats:styled-content style="fixed-case">SAD</jats:styled-content>5</jats:italic>, their effects on plant fitness (i.e., offspring number), and the dynamics of speciation. Our model suggests that the two‐locus architecture of reproductive isolation allows for rapid sympatric speciation by pollinator shift; however, the likelihood of such pollinator‐mediated speciation is asymmetric between the two orchid species <jats:italic>O. sphegodes</jats:italic> and <jats:italic>O. exaltata</jats:italic> due to different fitness effects of their predominant <jats:italic><jats:styled-content style="fixed-case">SAD</jats:styled-content>2</jats:italic> and <jats:italic><jats:styled-content style="fixed-case">SAD</jats:styled-content>5</jats:italic> alleles. Our study not only provides insight into pollinator adaptation and speciation mechanisms of sexually deceptive orchids but also demonstrates the power of applying a modeling approach to the study of pollinator‐driven ecological speciation.</jats:p>
- Autoren
- Shuqing Xu
- Philipp M Schlüter
- DOI
- 10.1002/ece3.1378
- eISSN
- 2045-7758
- ISSN
- 2045-7758
- Ausgabe der Veröffentlichung
- 2
- Zeitschrift
- Ecology and Evolution
- Sprache
- en
- Online publication date
- 2015
- Paginierung
- 493 - 502
- Datum der Veröffentlichung
- 2015
- Status
- Published
- Herausgeber
- Wiley
- Herausgeber URL
- http://dx.doi.org/10.1002/ece3.1378
- Datum der Datenerfassung
- 2023
- Titel
- Modeling the two‐locus architecture of divergent pollinator adaptation: how variation in <i><scp>SAD</scp></i> paralogs affects fitness and evolutionary divergence in sexually deceptive orchids
- Ausgabe der Zeitschrift
- 5
Datenquelle: Crossref
- Abstract
- Divergent selection by pollinators can bring about strong reproductive isolation via changes at few genes of large effect. This has recently been demonstrated in sexually deceptive orchids, where studies (1) quantified the strength of reproductive isolation in the field; (2) identified genes that appear to be causal for reproductive isolation; and (3) demonstrated selection by analysis of natural variation in gene sequence and expression. In a group of closely related Ophrys orchids, specific floral scent components, namely n-alkenes, are the key floral traits that control specific pollinator attraction by chemical mimicry of insect sex pheromones. The genetic basis of species-specific differences in alkene production mainly lies in two biosynthetic genes encoding stearoyl-acyl carrier protein desaturases (SAD) that are associated with floral scent variation and reproductive isolation between closely related species, and evolve under pollinator-mediated selection. However, the implications of this genetic architecture of key floral traits on the evolutionary processes of pollinator adaptation and speciation in this plant group remain unclear. Here, we expand on these recent findings to model scenarios of adaptive evolutionary change at SAD2 and SAD5, their effects on plant fitness (i.e., offspring number), and the dynamics of speciation. Our model suggests that the two-locus architecture of reproductive isolation allows for rapid sympatric speciation by pollinator shift; however, the likelihood of such pollinator-mediated speciation is asymmetric between the two orchid species O. sphegodes and O. exaltata due to different fitness effects of their predominant SAD2 and SAD5 alleles. Our study not only provides insight into pollinator adaptation and speciation mechanisms of sexually deceptive orchids but also demonstrates the power of applying a modeling approach to the study of pollinator-driven ecological speciation.
- Addresses
- Department of Molecular Ecology, Max Planck Institute for Chemical Ecology Hans-Knöll-Straße 8, D-07745, Jena, Germany.
- Autoren
- Shuqing Xu
- Philipp M Schlüter
- DOI
- 10.1002/ece3.1378
- eISSN
- 2045-7758
- Externe Identifier
- PubMed Identifier: 25691974
- PubMed Central ID: PMC4314279
- Funding acknowledgements
- Swiss National Science Foundation: 31003A_130796
- Swiss National Science Foundation: 130796
- European Commission: IEF 328935
- Swiss National Science Foundation: PEBZP3-142886
- Swiss National Science Foundation: 142886
- Open access
- true
- ISSN
- 2045-7758
- Ausgabe der Veröffentlichung
- 2
- Zeitschrift
- Ecology and evolution
- Sprache
- eng
- Medium
- Print-Electronic
- Online publication date
- 2015
- Open access status
- Open Access
- Paginierung
- 493 - 502
- Datum der Veröffentlichung
- 2015
- Status
- Published
- Publisher licence
- CC BY
- Datum der Datenerfassung
- 2015
- Titel
- Modeling the two-locus architecture of divergent pollinator adaptation: how variation in SAD paralogs affects fitness and evolutionary divergence in sexually deceptive orchids.
- Sub types
- research-article
- Journal Article
- Ausgabe der Zeitschrift
- 5
Files
https://onlinelibrary.wiley.com/doi/pdfdirect/10.1002/ece3.1378 https://europepmc.org/articles/PMC4314279?pdf=render
Datenquelle: Europe PubMed Central
- Abstract
- Divergent selection by pollinators can bring about strong reproductive isolation via changes at few genes of large effect. This has recently been demonstrated in sexually deceptive orchids, where studies (1) quantified the strength of reproductive isolation in the field; (2) identified genes that appear to be causal for reproductive isolation; and (3) demonstrated selection by analysis of natural variation in gene sequence and expression. In a group of closely related Ophrys orchids, specific floral scent components, namely n-alkenes, are the key floral traits that control specific pollinator attraction by chemical mimicry of insect sex pheromones. The genetic basis of species-specific differences in alkene production mainly lies in two biosynthetic genes encoding stearoyl-acyl carrier protein desaturases (SAD) that are associated with floral scent variation and reproductive isolation between closely related species, and evolve under pollinator-mediated selection. However, the implications of this genetic architecture of key floral traits on the evolutionary processes of pollinator adaptation and speciation in this plant group remain unclear. Here, we expand on these recent findings to model scenarios of adaptive evolutionary change at SAD2 and SAD5, their effects on plant fitness (i.e., offspring number), and the dynamics of speciation. Our model suggests that the two-locus architecture of reproductive isolation allows for rapid sympatric speciation by pollinator shift; however, the likelihood of such pollinator-mediated speciation is asymmetric between the two orchid species O. sphegodes and O. exaltata due to different fitness effects of their predominant SAD2 and SAD5 alleles. Our study not only provides insight into pollinator adaptation and speciation mechanisms of sexually deceptive orchids but also demonstrates the power of applying a modeling approach to the study of pollinator-driven ecological speciation.
- Date of acceptance
- 2014
- Autoren
- Shuqing Xu
- Philipp M Schlüter
- Autoren-URL
- https://www.ncbi.nlm.nih.gov/pubmed/25691974
- DOI
- 10.1002/ece3.1378
- Externe Identifier
- PubMed Central ID: PMC4314279
- ISSN
- 2045-7758
- Ausgabe der Veröffentlichung
- 2
- Zeitschrift
- Ecol Evol
- Schlüsselwörter
- Divergent selection
- ecological speciation
- molecular basis of adaptation
- plant fitness
- plant–pollinator interaction
- sexually deceptive orchids
- speciation genes
- stearoyl–ACP desaturases
- Sprache
- eng
- Country
- England
- Paginierung
- 493 - 502
- Datum der Veröffentlichung
- 2015
- Status
- Published
- Datum, an dem der Datensatz öffentlich gemacht wurde
- 2015
- Titel
- Modeling the two-locus architecture of divergent pollinator adaptation: how variation in SAD paralogs affects fitness and evolutionary divergence in sexually deceptive orchids.
- Sub types
- Journal Article
- Ausgabe der Zeitschrift
- 5
Datenquelle: PubMed
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