The role of linkage disequilibrium in the evolution of premating isolation

Servedio, Maria R.

doi:10.1038/hdy.2008.98

Cited by 77 publications

(92 citation statements)

References 33 publications

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“…Theoretical work suggests that traits under disruptive selection also used as mating cues (i.e. magic traits) may be especially effective in promoting speciation because they will form strong genetic associations with loci underlying premating isolation, and that use these cues as markers [4,5,8,38]. Despite this, it is perhaps often overlooked that the existence of magic traits does not make speciation automatic or inevitable [9].…”

Section: Discussionmentioning

confidence: 99%

Disruptive ecological selection on a mating cue

et al. 2012

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Adaptation to divergent ecological niches can result in speciation. Traits subject to disruptive selection that also contribute to non-random mating will facilitate speciation with gene flow. Such 'magic' or 'multipleeffect' traits may be widespread and important for generating biodiversity, but strong empirical evidence is still lacking. Although there is evidence that putative ecological traits are indeed involved in assortative mating, evidence that these same traits are under divergent selection is considerably weaker. Heliconius butterfly wing patterns are subject to positive frequency-dependent selection by predators, owing to aposematism and Mü llerian mimicry, and divergent colour patterns are used by closely related species to recognize potential mates. The amenability of colour patterns to experimental manipulation, independent of other traits, presents an excellent opportunity to test their role during speciation. We conducted field experiments with artificial butterflies, designed to match natural butterflies with respect to avian vision. These were complemented with enclosure trials with live birds and real butterflies. Our experiments showed that hybrid colour-pattern phenotypes are attacked more frequently than parental forms. For the first time, we demonstrate disruptive ecological selection on a trait that also acts as a mating cue.

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Section: Discussionmentioning

confidence: 99%

Disruptive ecological selection on a mating cue

et al. 2012

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“…Thus, hybridization is both the source of reinforcing selection and a major hindrance to the success of reinforcement (Kirkpatrick, 2000). In order for new alleles conferring assortative mating to evolve, they must remain genetically associated with alleles causing reduced hybrid viability or fertility (for review, see Servedio, 2009). Extensive theoretical research has illustrated that the feasibility of reinforcement is determined by a balance between the evolutionary forces of selection, gene flow, and recombination (Liou and Price, 1994;Servedio and Kirkpatrick, 1997;Kirkpatrick and Servedio, 1999;Kirkpatrick, 2000).…”

Section: Reinforcementmentioning

confidence: 99%

Hybridization in Plants: Old Ideas, New Techniques

2016

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Hybridization has played an important role in the evolution of many lineages. With the growing availability of genomic tools and advancements in genomic analyses, it is becoming increasingly clear that gene flow between divergent taxa can generate new phenotypic diversity, allow for adaptation to novel environments, and contribute to speciation. Hybridization can have immediate phenotypic consequences through the expression of hybrid vigor. On longer evolutionary time scales, hybridization can lead to local adaption through the introgression of novel alleles and transgressive segregation and, in some cases, result in the formation of new hybrid species. Studying both the abundance and the evolutionary consequences of hybridization has deep historical roots in plant biology. Many of the hypotheses concerning how and why hybridization contributes to biological diversity currently being investigated were first proposed tens and even hundreds of years ago. In this Update, we discuss how new advancements in genomic and genetic tools are revolutionizing our ability to document the occurrence of and investigate the outcomes of hybridization in plants.

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“…A challenge for ecological speciation is that gene flow and recombination break up associations between alleles for population-specific adaptive traits, mating traits and mate preference. Ecological speciation is facilitated by mechanisms that reduce recombination [4,5] such as when a single allele leads to assortative mating in both incipient species ('one allele mechanisms') [6] or when traits under divergent selection are also used in mate choice ('magic traits') [7]. Sexual imprinting generates mate preferences based on parental traits [8] and potentially may act as a one-allele mechanism that creates magic traits during speciation.…”

Section: Introductionmentioning

confidence: 99%

Sexual imprinting on ecologically divergent traits leads to sexual isolation in sticklebacks

2011

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During sexual imprinting, offspring learn parental phenotypes and then select mates who are similar to their parents. Imprinting has been thought to contribute to the process of speciation in only a few rare cases; this is despite imprinting's potential to generate assortative mating and solve the problem of recombination in ecological speciation. If offspring imprint on parental traits under divergent selection, these traits will then be involved in both adaptation and mate preference. Such 'magic traits' easily generate sexual isolation and facilitate speciation. In this study, we show that imprinting occurs in two ecologically divergent stickleback species (benthics and limnetics: Gasterosteus spp.). Cross-fostered females preferred mates of their foster father's species. Furthermore, imprinting is essential for sexual isolation between species; isolation was reduced when females were raised without fathers. Daughters imprinted on father odour and colour during a critical period early in development. These traits have diverged between the species owing to differences in ecology. Therefore, we provide the first evidence that imprinting links ecological adaptation to sexual isolation between species. Our results suggest that imprinting may facilitate the evolution of sexual isolation during ecological speciation, may be especially important in cases of rapid diversification, and thus play an integral role in the generation of biodiversity.

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The role of linkage disequilibrium in the evolution of premating isolation

Cited by 77 publications

References 33 publications

Disruptive ecological selection on a mating cue

Disruptive ecological selection on a mating cue

Hybridization in Plants: Old Ideas, New Techniques

Sexual imprinting on ecologically divergent traits leads to sexual isolation in sticklebacks

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