Natural Selection on a Major Armor Gene in Threespine Stickleback

Barrett, Rowan D. H.; Rogers, Sean M.; Schluter, Dolph

doi:10.1126/science.1159978

Cited by 346 publications

(421 citation statements)

References 40 publications

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“…Most recently, Shaw et al [44] introduced aster modelling, which allows one to combine estimates of selection acting through different fitness components in a unifying statistical framework to gain insight into overall fitness. Our understanding of adaptive evolutionary change would also be greatly advanced through more temporally replicated studies that incorporate experimental manipulations [35], studies that quantify selection on the same trait using multiple fitness components, studies that control for environmental biases [46], studies that identify the genetic underpinnings of traits [47][48][49][50] and studies with sufficient statistical power to detect significant but weak selection [51].…”

Section: Discussionmentioning

confidence: 99%

Differences in the temporal dynamics of phenotypic selection among fitness components in the wild

et al. 2010

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The balance of selection acting through different fitness components (e.g. fecundity, mating success, survival) determines the potential tempo and trajectory of adaptive evolution. Yet the extent to which the temporal dynamics of phenotypic selection may vary among fitness components is poorly understood. Here, we compiled a database of 3978 linear selection coefficients from temporally replicated studies of selection in wild populations to address this question. Across studies, we find that multi-year selection through mating success and fecundity is stronger than selection through survival, but varies less in direction. We also report that selection through mating success varies more in long-term average strength than selection through either survival or fecundity. The consistency in direction and stronger long-term average strength of selection through mating success and fecundity suggests that selection through these fitness components should cause more persistent directional evolution relative to selection through survival. Similar patterns were apparent for the subset of studies that evaluated the temporal dynamics of selection on traits simultaneously using several different fitness components, but few such studies exist. Taken together, these results reveal key differences in the temporal dynamics of selection acting through different fitness components, but they also reveal important limitations in our understanding of how selection drives adaptive evolution.

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Section: Discussionmentioning

confidence: 99%

Differences in the temporal dynamics of phenotypic selection among fitness components in the wild

et al. 2010

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“…The increasing availability of genomic data for species in adaptive radiations (e.g., Dar-win's finches: Abzhanov et al 2004Abzhanov et al , 2006 and the ability to combine detailed studies of natural selection and genomics will immeasurably advance our understanding of adaptive radiation; such work is already underway with sticklebacks (Barrett et al 2008) and likely will soon be joined by studies on many other taxa.…”

Section: Future Prospectsmentioning

confidence: 99%

Adaptive Radiation, Ecological Opportunity, and Evolutionary Determinism

Losos

2010

The American Naturalist

559

603

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Adaptive radiation refers to diversification from an ancestral species that produces descendants adapted to use a great variety of distinct ecological niches. In this review, I examine two aspects of adaptive radiation: first, that it results from ecological opportunity and, second, that it is deterministic in terms of its outcome and evolutionary trajectory. Ecological opportunity is usually a prerequisite for adaptive radiation, although in some cases, radiation can occur in the absence of preexisting opportunity. Nonetheless, many clades fail to radiate although seemingly in the presence of ecological opportunity; until methods are developed to identify and quantify ecological opportunity, the concept will have little predictive utility in understanding a priori when a clade might be expected to radiate. Although predicted by theory, replicated adaptive radiations occur only rarely, usually in closely related and poorly dispersing taxa found in the same region on islands or in lakes. Contingencies of a variety of types may usually preclude close similarity in the outcome of evolutionary diversification in other situations. Whether radiations usually unfold in the same general sequence is unclear because of the unreliability of methods requiring phylogenetic reconstruction of ancestral events. The synthesis of ecological, phylogenetic, experimental, and genomic advances promises to make the coming years a golden age for the study of adaptive radiation; natural history data, however, will always be crucial to understanding the forces shaping adaptation and evolutionary diversification.

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“…Schemske & Bierzychudek 2007;Kane et al 2009) and animals (e.g. Hoekstra et al 2006;Joron et al 2006;Storz et al 2007;Barrett et al 2008; other papers in this issue). Yet, identification of causative genetic polymorphisms underlying phenotypic divergence and elucidating the effect of natural selection on the molecular genetic architecture of adaptive traits and reproductive isolation remains a daunting task, particularly in organisms lacking extensive sequence information and other genomic resources.…”

Section: Introductionmentioning

confidence: 99%

On the origin of species: insights from the ecological genomics of lake whitefish

Bernatchez

Renaut

Whiteley

et al. 2010

Phil. Trans. R. Soc. B

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226

317

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In contrast to the large amount of ecological information supporting the role of natural selection as a main cause of population divergence and speciation, an understanding of the genomic basis underlying those processes is in its infancy. In this paper, we review the main findings of a long-term research programme that we have been conducting on the ecological genomics of sympatric forms of whitefish (Coregonus spp.) engaged in the process of speciation. We present this system as an example of how applying a combination of approaches under the conceptual framework of the theory of adaptive radiation has yielded substantial insight into evolutionary processes in a non-model species. We also discuss how the joint use of recent biotechnological developments will provide a powerful means to address issues raised by observations made to date. Namely, we present data illustrating the potential offered by combining next generation sequencing technologies with other genomic approaches to reveal the genomic bases of adaptive divergence and reproductive isolation. Given increasing access to these new genomic tools, we argue that non-model species studied in their ecological context such as whitefish will play an increasingly important role in generalizing knowledge of speciation.

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Natural Selection on a Major Armor Gene in Threespine Stickleback

Cited by 346 publications

References 40 publications

Differences in the temporal dynamics of phenotypic selection among fitness components in the wild

Differences in the temporal dynamics of phenotypic selection among fitness components in the wild

Adaptive Radiation, Ecological Opportunity, and Evolutionary Determinism

On the origin of species: insights from the ecological genomics of lake whitefish

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