DEMOGRAPHIC SOURCE-SINK DYNAMICS RESTRICT LOCAL ADAPTATION IN ELLIOTT'S BLUEBERRY (<i>VACCINIUM ELLIOTTII</i>)

Anderson, Jill T.; Geber, Monica A.

doi:10.1111/j.1558-5646.2009.00825.x

Cited by 42 publications

(58 citation statements)

References 88 publications

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“…However, a recent experiment with D. melanogaster in heterogeneous laboratory environments found no evidence that environmental heterogeneity increases genetic variation 105 . Several recent studies of gene flow among plant populations support the prediction that immigration of maladapted alleles may limit the capacity of populations to adapt to local environmental conditions 106,107 . Future progress in understanding the role of migration–selection balance and whether environmental heterogeneity can maintain genetic variation will benefit from experimental studies in natural populations 105 , especially for known QTLs experiencing natural selection.…”

Section: Recombination and Adaptationmentioning

confidence: 89%

Adaptive evolution: evaluating empirical support for theoretical predictions

2012

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Adaptive evolution is shaped by the interaction of population genetics, natural selection and underlying network and biochemical constraints. Variation created by mutation, the raw material for evolutionary change, is translated into phenotypes by flux through metabolic pathways and by the topography and dynamics of molecular networks. Finally, the retention of genetic variation and the efficacy of selection depend on population genetics and demographic history. Emergent high-throughput experimental methods and sequencing technologies allow us to gather more evidence and to move beyond the theory in different systems and populations. Here we review the extent to which recent evidence supports long-established theoretical principles of adaptation.

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Section: Recombination and Adaptationmentioning

confidence: 89%

Adaptive evolution: evaluating empirical support for theoretical predictions

2012

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“…A number of empirical and theoretical studies support the hypothesis that migrational loads can restrict local adaptation in sexual species (e.g., Garcia-Ramos and Kirkpatrick 1997; Kirkpatrick and Barton 1997; Riechert et al 2001; Bolnick and Nosil 2007; Filin et al 2008; Anderson and Geber 2010). This effect can be shown in a discrete-generation model of selection with two alleles A and B at a single diploid locus in a sink habitat, where immigrants are homozygous for allele A (see Gomulkiewicz et al 1999 for more details).…”

Section: Recurrent Dispersalmentioning

confidence: 96%

Theoretical Perspectives on the Statics and Dynamics of Species’ Borders in Patchy Environments

Holt

Barfield

2011

The American Naturalist

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Understanding range limits is a fundamental problem in ecology and evolutionary biology. In 1963, Mayr argued that “contaminating” gene flow from central populations constrained adaptation in marginal populations, preventing range expansion, while in 1984, Bradshaw suggested that absence of genetic variation prevented species from occurring everywhere. Understanding stability of range boundaries requires unraveling the interplay of demography, gene flow, and evolution of populations in concrete landscape settings. We walk through a set of interrelated spatial scenarios that illustrate interesting complexities of this interplay. To motivate our individual-based model results, we consider a hypothetical zooplankter in a landscape of discrete water bodies coupled by dispersal. We examine how patterns of dispersal influence adaptation in sink habitats where conditions are outside the species’ niche. The likelihood of observing niche evolution (and thus range expansion) over any given timescale depends on (1) the degree of initial maladaptation; (2) pattern (pulsed vs. continuous, uni- vs. bidirectional), timing (juvenile vs. adult), and rate of dispersal (and hence population size); (3) mutation rate; (4) sexuality; and (5) the degree of heterogeneity in the occupied range. We also show how the genetic architecture of polygenic adaptation is influenced by the interplay of selection and dispersal in heterogeneous landscapes.

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“…Local adaptation, defined as the condition whereby resident genotypes exhibit higher relative fitness in their local habitat compared to genotypes originating from other habitats (Kawecki and Ebert 2004), has been reported for a number of plant species over the last four decades (e.g., Antonovics and Bradshaw 1970;Schmidt and Levin 1985;Van Tienderen and Van der Toorn 1991;Geber and Eckhart 2005;Anderson and Geber 2009). Based on these results, it has been often assumed that plant local adaptation is a common condition across populations and species.…”

Section: Introductionmentioning

confidence: 98%

Influence of multiple factors on plant local adaptation: soil type and folivore effects in Ruellia nudiflora (Acanthaceae)

et al. 2011

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Different environmental factors can have contrasting effects on the extent of plant local adaptation (LA). Here we evaluate the influence of folivory and soil type on LA in Ruellia nudiflora by performing reciprocal transplants at two sites in Yucatan (Mexico) while controlling for soil source and folivory level. Soil samples were collected at each site and half of the plants of each source at each site were grown with one soil source and half with the other. After transplanting, we reduced folivory by using an insecticide applied to half of the plants of each population source grown on each soil at each site. This resulted in a fully-crossed design with site, population source, soil source and folivory as main effects. We evaluated LA by means of a significant site 9 origin interaction showing a home-site advantage of native plants. Additionally, to test for an effect of soil source and folivores on LA, we estimated the three-way interactions of site 9 origin 9 soil source and site 9 origin 9 folivory. We recorded fruit number and survival throughout an 8-month period. For survival, we found evidence of home-site advantage at one site, while for fecundity we found no evidence of LA and at one site even observed evidence of lower fecundity for local relative to foreign plants. Importantly, folivory had no influence on the degree of home-site advantage for either response variable, while soil source influenced the degree of home-site advantage in fecundity at one site (suggesting some degree of specialization to soil characteristics in R. nudiflora). Our results emphasize the need for simultaneously evaluating multiple factors of influence in tests of LA.

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DEMOGRAPHIC SOURCE-SINK DYNAMICS RESTRICT LOCAL ADAPTATION IN ELLIOTT'S BLUEBERRY (VACCINIUM ELLIOTTII)

Abstract: Environmental heterogeneity results in varying patterns of natural selection across the landscape (e.g

Cited by 42 publications

References 88 publications

Adaptive evolution: evaluating empirical support for theoretical predictions

Adaptive evolution: evaluating empirical support for theoretical predictions

Theoretical Perspectives on the Statics and Dynamics of Species’ Borders in Patchy Environments

Influence of multiple factors on plant local adaptation: soil type and folivore effects in Ruellia nudiflora (Acanthaceae)

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