1,999 results match your criteria Genetics Selection Evolution [Journal]


Inclusive fitness is an indispensable approximation for understanding organismal design.

Evolution 2019 Apr 16. Epub 2019 Apr 16.

St John's College, Oxford University, Oxford, OX1 3JP, United Kingdom.

For some decades most biologists interested in design have agreed that natural selection leads to organisms acting as if they are maximising a quantity known as 'inclusive fitness'. This maximisation principle has been criticised on the (uncontested) grounds that other quantities, such as offspring number, predict gene frequency changes accurately in a wider range of mathematical models. Here we adopt a resolution offered by Birch, who accepts the technical difficulties of establishing inclusive fitness maximisation in a fully general model, while concluding that inclusive fitness is still useful as an organising framework. Read More

View Article

Download full-text PDF

Source
https://onlinelibrary.wiley.com/doi/abs/10.1111/evo.13739
Publisher Site
http://dx.doi.org/10.1111/evo.13739DOI Listing
April 2019
1 Read

Antagonistic selection and pleiotropy constrain the evolution of plant chemical defenses.

Evolution 2019 Apr 5. Epub 2019 Apr 5.

University Program in Genetics and Genomics, Duke University, Durham, North Carolina, 27708.

When pleiotropy is present, genetic correlations may constrain the evolution of ecologically important traits. We used a quantitative genetics approach to investigate constraints on the evolution of secondary metabolites in a wild mustard, Boechera stricta. Much of the genetic variation in chemical composition of glucosinolates in B. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1111/evo.13728DOI Listing
April 2019
1 Read

A multiple peak adaptive landscape based on feeding strategies and roosting ecology shaped the evolution of cranial covariance structure and morphological differentiation in phyllostomid bats.

Evolution 2019 Mar 12. Epub 2019 Mar 12.

Department of Genetics and Evolutionary Biology, Biosciences Institute, University of São Paulo, São Paulo, Brazil.

We explored the evolution of morphological integration in the most noteworthy example of adaptive radiation in mammals, the New World leaf-nosed bats, using a massive dataset and by combining phylogenetic comparative methods and quantitative genetic approaches. We demonstrated that the phenotypic covariance structure remained conserved on a broader phylogenetic scale but also showed a substantial divergence between interclade comparisons. Most of the phylogenetic structure in the integration space can be explained by splits at the beginning of the diversification of major clades. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1111/evo.13715DOI Listing

Characterizing morphological (co)variation using structural equation models: Body size, allometric relationships and evolvability in a house sparrow metapopulation.

Evolution 2019 Mar 17;73(3):452-466. Epub 2019 Jan 17.

Department of Biology, Centre for Biodiversity Dynamics (CBD), Norwegian University of Science and Technology (NTNU), N-7491, Trondheim, Norway.

Body size plays a key role in the ecology and evolution of all organisms. Therefore, quantifying the sources of morphological (co)variation, dependent and independent of body size, is of key importance when trying to understand and predict responses to selection. We combine structural equation modeling with quantitative genetics analyses to study morphological (co)variation in a meta-population of house sparrows (Passer domesticus). Read More

View Article

Download full-text PDF

Source
http://doi.wiley.com/10.1111/evo.13668
Publisher Site
http://dx.doi.org/10.1111/evo.13668DOI Listing
March 2019
2 Reads

Phenological mismatch drives selection on elevation, but not on slope, of breeding time plasticity in a wild songbird.

Evolution 2019 Feb 21;73(2):175-187. Epub 2018 Dec 21.

Department of Animal Ecology, Netherlands Institute of Ecology (NIOO-KNAW), 6700, AB Wageningen, The Netherlands.

Phenotypic plasticity is an important mechanism for populations to respond to fluctuating environments, yet may be insufficient to adapt to a directionally changing environment. To study whether plasticity can evolve under current climate change, we quantified selection and genetic variation in both the elevation (RN ) and slope (RN ) of the breeding time reaction norm in a long-term (1973-2016) study population of great tits (Parus major). The optimal RN (the caterpillar biomass peak date regressed against the temperature used as cue by great tits) changed over time, whereas the optimal RN did not. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1111/evo.13660DOI Listing
February 2019
1 Read

Ecological divergence plays an important role in strong but complex reproductive isolation in campions (Silene).

Evolution 2019 Feb 12;73(2):245-261. Epub 2018 Dec 12.

ETH Zurich, Institute of Integrative Biology, Universitätstrasse 16, 8092, Zürich, Switzerland.

New species arise through the evolution of reproductive barriers between formerly interbreeding lineages. Yet, comprehensive assessments of potential reproductive barriers, which are needed to make inferences on processes driving speciation, are only available for a limited number of systems. In this study, we estimated individual and cumulative strengths of seven prezygotic and six postzygotic reproductive barriers between the recently diverged taxa Silene dioica (L. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1111/evo.13652DOI Listing
February 2019
7 Reads

The importance of the Neutral Theory in 1968 and 50 years on: A response to Kern and Hahn 2018.

Evolution 2019 Jan 27;73(1):111-114. Epub 2018 Nov 27.

Institute of Evolutionary Biology, School of Biological Sciences, University of Edinburgh, Edinburgh, United Kingdom.

A recent article reassessing the Neutral Theory of Molecular Evolution claims that it is no longer as important as is widely believed. The authors argue that "the neutral theory was supported by unreliable theoretical and empirical evidence from the beginning, and that in light of modern, genome-scale data, we can firmly reject its universality." Claiming that "the neutral theory has been overwhelmingly rejected," they propose instead that natural selection is the major force shaping both between-species divergence and within-species variation. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1111/evo.13650DOI Listing
January 2019
1 Read

A meta-analysis of the agents of selection on floral traits.

Evolution 2019 Jan 20;73(1):4-14. Epub 2018 Nov 20.

Department of Ecology and Genetics, Uppsala University, Uppsala, 751 05, Sweden.

Floral traits are hypothesized to evolve primarily in response to selection by pollinators. However, selection can also be mediated by other environmental factors. To understand the relative importance of pollinator-mediated selection and its variation among trait and pollinator types, we analyzed directional selection gradients on floral traits from experiments that manipulated the environment to identify agents of selection. Read More

View Article

Download full-text PDF

Source
http://doi.wiley.com/10.1111/evo.13639
Publisher Site
http://dx.doi.org/10.1111/evo.13639DOI Listing
January 2019
16 Reads

Masculinization of gene expression is associated with male quality in Drosophila melanogaster.

Evolution 2018 Dec 1;72(12):2736-2748. Epub 2018 Nov 1.

School of Biological Sciences, Monash University, Clayton, Victoria, 3800, Australia.

The signature of sexual selection has been revealed through the study of differences in patterns of genome-wide gene expression, both between the sexes and between alternative reproductive morphs within a single sex. What remains unclear, however, is whether differences in gene expression patterns between individuals of a given sex consistently map to variation in individual quality. Such a pattern, particularly if found in males, would provide unambiguous evidence that the phenotypic response to sexual selection is shaped through sex-specific alterations to the transcriptome. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1111/evo.13618DOI Listing
December 2018

A two-locus hybrid incompatibility is widespread, polymorphic, and active in natural populations of Mimulus.

Evolution 2018 Nov 20;72(11):2394-2405. Epub 2018 Sep 20.

Department of Genetics, University of Georgia, Athens, Georgia.

Reproductive isolation, which is essential for the maintenance of species in sympatry, is often incomplete between closely related species. In these taxa, reproductive barriers must evolve within species, without being degraded by ongoing gene flow. To better understand this dynamic, we investigated the frequency and geographic distribution of alleles underlying a two-locus, hybrid lethality system between naturally hybridizing species of monkeyflower (Mimulus guttatus and M. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1111/evo.13596DOI Listing
November 2018
1 Read

Selection for pollen competitive ability in mixed-mating systems.

Evolution 2018 Nov 27;72(11):2513-2536. Epub 2018 Sep 27.

Department of Ecology and Evolutionary Biology, University of Toronto, 25 Willcocks Street, Toronto, ON M5S 3B2, Canada.

Coexpression of genes in plant sporophytes and gametophytes allows correlated gametic and sporophytic selection. Theory predicts that, under outcrossing, an allele conferring greater pollen competitive ability should fix within a population unless antagonistic pleiotropy with the sporophyte stage is strong. However, under strong selfing, pollen competitiveness is immaterial as superior and inferior competitors are deposited on opposite stigmas, producing assortative competition. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1111/evo.13597DOI Listing
November 2018
1 Read

The appearance of mimetic Heliconius butterflies to predators and conspecifics.

Evolution 2018 Oct 5;72(10):2156-2166. Epub 2018 Sep 5.

Butterfly Genetics Group, Department of Zoology, University of Cambridge, United Kingdom.

Adaptive coloration is under conflicting selection pressures: choosing potential mates and warning signaling against visually guided predators. Different elements of the color signal may therefore be tuned by evolution for different functions. We investigated how mimicry in four pairs of Heliconius comimics is potentially seen both from the perspective of butterflies and birds. Read More

View Article

Download full-text PDF

Source
http://doi.wiley.com/10.1111/evo.13583
Publisher Site
http://dx.doi.org/10.1111/evo.13583DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6221148PMC
October 2018
18 Reads

Asymmetric evolutionary responses to sex-specific selection in a hermaphrodite.

Evolution 2018 Oct 10;72(10):2181-2201. Epub 2018 Sep 10.

Centre d'Ecologie Fonctionnelle et Evolutive, UMR 5175, CNRS, Université de Montpellier, Université Paul-Valéry Montpellier, Ecole Pratique des Hautes Etudes, 1919 Route de Mende, 34293 Montpellier Cedex 05, France.

Sex allocation theory predicts that simultaneous hermaphrodites evolve to an evolutionary stable resource allocation, whereby any increase in investment to male reproduction leads to a disproportionate cost on female reproduction and vice versa. However, empirical evidence for sexual trade-offs in hermaphroditic animals is still limited. Here, we tested how male and female reproductive traits evolved under conditions of reduced selection on either male or female reproduction for 40 generations in a hermaphroditic snail. Read More

View Article

Download full-text PDF

Source
http://doi.wiley.com/10.1111/evo.13565
Publisher Site
http://dx.doi.org/10.1111/evo.13565DOI Listing
October 2018
19 Reads

Heritability, selection, and the response to selection in the presence of phenotypic measurement error: Effects, cures, and the role of repeated measurements.

Evolution 2018 Oct 29;72(10):1992-2004. Epub 2018 Aug 29.

Department of Evolutionary Biology and Environmental Studies, University of Zürich, Winterthurerstrasse 190, 8057 Zürich, Switzerland.

Quantitative genetic analyses require extensive measurements of phenotypic traits, a task that is often not trivial, especially in wild populations. On top of instrumental measurement error, some traits may undergo transient (i.e. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1111/evo.13573DOI Listing
October 2018
6 Reads

How to quantify (the response to) sexual selection on traits.

Evolution 2018 Sep 26;72(9):1904-1917. Epub 2018 Jul 26.

Division of Ecology and Evolution, Research School of Biology, The Australian National University, Acton, ACT 2601, Canberra, Australia.

Natural selection operates via fitness components like mating success, fecundity, and longevity, which can be understood as intermediaries in the causal process linking traits to fitness. In particular, sexual selection occurs when traits influence mating or fertilization success, which, in turn, influences fitness. We show how to quantify both these steps in a single path analysis, leading to better estimates of the strength of sexual selection. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1111/evo.13554DOI Listing
September 2018
5 Reads

Stabilizing selection, mutational bias, and the evolution of sex.

Evolution 2018 Sep 26;72(9):1740-1758. Epub 2018 Jul 26.

CNRS, UMI 3614 Evolutionary Biology and Ecology of Algae, 29688 Roscoff, France.

Stabilizing selection around a fixed phenotypic optimum is expected to disfavor sexual reproduction, since asexually reproducing organisms can maintain a higher fitness at equilibrium, while sex disrupts combinations of compensatory mutations. This conclusion rests on the assumption that mutational effects on phenotypic traits are unbiased, that is, mutation does not tend to push phenotypes in any particular direction. In this article, we consider a model of stabilizing selection acting on an arbitrary number of polygenic traits coded by bialellic loci, and show that mutational bias may greatly reduce the mean fitness of asexual populations compared with sexual ones in regimes where mutations have weak to moderate fitness effects. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1111/evo.13547DOI Listing
September 2018
1 Read

Directional selection reduces developmental canalization against genetic and environmental perturbations in Drosophila wings.

Evolution 2018 Jul 9. Epub 2018 Jul 9.

Laboratory of Genetics, University of Wisconsin-Madison, Madison, Wisconsin, 53706.

Natural selection may enhance or weaken the robustness of phenotypes against genetic or environmental perturbations. However, important aspects of the relationship between adaptive evolution and canalization remain unclear. Recent work showed that the evolution of larger wing size in a high altitude natural population of Drosophila melanogaster was accompanied by decanalized wing development--specifically a loss of robustness to genetic perturbation. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1111/evo.13550DOI Listing
July 2018
6 Reads

Geographic clines in wing morphology relate to colonization history in New World but not Old World populations of yellow dung flies.

Evolution 2018 Jun 17. Epub 2018 Jun 17.

Department of Evolutionary Biology and Environmental Studies, University of Zurich, Winterthurerstrasse 190, CH-8057 Zurich, Switzerland.

Geographic clines offer insights about putative targets and agents of natural selection as well as tempo and mode of adaptation. However, demographic processes can lead to clines that are indistinguishable from adaptive divergence. Using the widespread yellow dung fly Scathophaga stercoraria (Diptera: Scathophagidae), we examine quantitative genetic differentiation (Q ) of wing shape across North America, Europe, and Japan, and compare this differentiation with that of ten microsatellites (F ). Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1111/evo.13517DOI Listing
June 2018
4 Reads

Dobzhansky-Muller incompatibilities, dominance drive, and sex-chromosome introgression at secondary contact zones: A simulation study.

Evolution 2018 May 28. Epub 2018 May 28.

Department of Ecology & Evolution, University of Lausanne, Biophore Building, Lausanne, 1015, Switzerland.

Dobzhansky-Muller (DM) incompatibilities involving sex chromosomes have been proposed to account for Haldane's rule (lowered fitness among hybrid offspring of the heterogametic sex) as well as Darwin's corollary (asymmetric fitness costs with respect to the direction of the cross). We performed simulation studies of a hybrid zone to investigate the effects of different types of DM incompatibilities on cline widths and positions of sex-linked markers. From our simulations, X-Y incompatibilities generate steep clines for both X-linked and Y-linked markers; random effects may produce strong noise in cline center positions when migration is high relative to fitness costs, but X- and Y-centers always coincide strictly. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1111/evo.13510DOI Listing
May 2018
2 Reads

Signatures of hybridization and speciation in genomic patterns of ancestry.

Evolution 2018 May 28. Epub 2018 May 28.

Laboratory of Genetics, University of Wisconsin-Madison, Madison, WI, 53706.

Genomes sampled from hybrid zones between nascent species provide important clues into the speciation process. With advances in genome sequencing and single nucleotide polymorphism (SNP) genotyping, it is now feasible to measure variation in gene flow with high genomic resolution. This progress motivates the development of conceptual and analytical frameworks for hybrid zones that complement well-established cline approaches. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1111/evo.13509DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6261709PMC
May 2018
2 Reads

Local adaptation and ecological differentiation under selection, migration, and drift in Arabidopsis lyrata.

Evolution 2018 May 9. Epub 2018 May 9.

Department of Ecology and Genetics, University of Oulu, FI-90014 Oulu, Finland.

How the balance between selection, migration, and drift influences the evolution of local adaptation has been under intense theoretical scrutiny. Yet, empirical studies that relate estimates of local adaptation to quantification of gene flow and effective population sizes have been rare. Here, we conducted a reciprocal transplant trial, a common garden trial, and a whole-genome-based demography analysis to examine these effects among Arabidopsis lyrata populations from two altitudinal gradients in Norway. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1111/evo.13502DOI Listing
May 2018
1 Read

Plasticity of plant defense and its evolutionary implications in wild populations of Boechera stricta.

Evolution 2018 May 10;72(5):1034-1049. Epub 2018 Apr 10.

Program in Genetics and Genomics, Department of Biology, Duke University, Durham, North Carolina 27708.

Phenotypic plasticity is thought to impact evolutionary trajectories by shifting trait values in a direction that is either favored by natural selection ("adaptive" plasticity) or disfavored ("nonadaptive" plasticity). However, it is unclear how commonly each of these types of plasticity occurs in natural populations. To answer this question, we measured glucosinolate defensive chemistry and reproductive fitness in over 1500 individuals of the wild perennial mustard Boechera stricta, planted in four common gardens across central Idaho, United States. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1111/evo.13469DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5961941PMC
May 2018
3 Reads

Quantification and decomposition of environment-selection relationships.

Evolution 2018 Apr;72(4):851-866

School of Biology, University of St Andrews, St Andrews, Fife KY16 9TH, United Kingdom.

In nature, selection varies across time in most environments, but we lack an understanding of how specific ecological changes drive this variation. Ecological factors can alter phenotypic selection coefficients through changes in trait distributions or individual mean fitness, even when the trait-absolute fitness relationship remains constant. We apply and extend a regression-based approach in a population of Soay sheep (Ovis aries) and suggest metrics of environment-selection relationships that can be compared across studies. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1111/evo.13461DOI Listing
April 2018
4 Reads

Effects of partial selfing on the equilibrium genetic variance, mutation load, and inbreeding depression under stabilizing selection.

Evolution 2018 Apr 6;72(4):751-769. Epub 2018 Mar 6.

CNRS, UMI 3614 Evolutionary Biology and Ecology of Algae,, 29688 Roscoff, France.

The mating system of a species is expected to have important effects on its genetic diversity. In this article, we explore the effects of partial selfing on the equilibrium genetic variance V , mutation load L, and inbreeding depression δ under stabilizing selection acting on a arbitrary number n of quantitative traits coded by biallelic loci with additive effects. When the U/n ratio is low (where U is the total haploid mutation rate on selected traits) and effective recombination rates are sufficiently high, genetic associations between loci are negligible and the genetic variance, mutation load, and inbreeding depression are well predicted by approximations based on single-locus models. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1111/evo.13449DOI Listing
April 2018
3 Reads

A species-specific multigene family mediates differential sperm displacement in Drosophila melanogaster.

Evolution 2018 02 22;72(2):399-403. Epub 2018 Jan 22.

Department of Ecology and Evolutionary Biology, University of California Irvine, Irvine, California 92697.

Sperm competition is a postcopulatory sexual selection mechanism in species in which females mate with multiple males. Despite its evolutionary relevance in shaping male traits, the genetic mechanisms underlying sperm competition are poorly understood. A recently originated multigene family specific to Drosophila melanogaster, Sdic, is important for the outcome of sperm competition in doubly mated females, although the mechanistic nature of this phenotype remained unresolved. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1111/evo.13417DOI Listing
February 2018
6 Reads

Preference for conspecifics evolves earlier in males than females in a sexually dimorphic radiation of fishes.

Evolution 2018 02 19;72(2):337-347. Epub 2017 Dec 19.

Department of Biological Sciences, North Carolina State University, Raleigh, North Carolina 27695.

Speciation by sexual selection is generally modeled as the coevolution of female preferences and elaborate male ornaments leading to behavioral (sexual) reproductive isolation. One prediction of these models is that female preference for conspecific males should evolve earlier than male preference for conspecific females in sexually dimorphic species with male ornaments. We tested that prediction in darters, a diverse group of freshwater fishes with sexually dimorphic ornamentation. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1111/evo.13406DOI Listing
February 2018
6 Reads

The consequences of sexual selection in well-adapted and maladapted populations of bean beetles†.

Evolution 2018 03 29;72(3):518-530. Epub 2018 Jan 29.

Department of Ecology and Genetics, Evolutionary Biology Centre, Uppsala University, Sweden.

Whether sexual selection generally promotes or impedes population persistence remains an open question. Intralocus sexual conflict (IaSC) can render sexual selection in males detrimental to the population by increasing the frequency of alleles with positive effects on male reproductive success but negative effects on female fecundity. Recent modeling based on fitness landscape theory, however, indicates that the relative impact of IaSC may be reduced in maladapted populations and that sexual selection therefore might promote adaptation when it is most needed. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1111/evo.13412DOI Listing
March 2018
5 Reads

Greater pollination generalization is not associated with reduced constraints on corolla shape in Antillean plants.

Evolution 2018 02 10;72(2):244-260. Epub 2018 Jan 10.

Department of Biological Sciences, The University of Alabama, Tuscaloosa, Alabama, 35487.

Flowers show important structural variation as reproductive organs but the evolutionary forces underlying this diversity are still poorly understood. In animal-pollinated species, flower shape is strongly fashioned by selection imposed by pollinators, which is expected to vary according to guilds of effective pollinators. Using the Antillean subtribe Gesneriinae (Gesneriaceae), we tested the hypothesis that pollination specialists pollinated by one functional type of pollinator have maintained more similar corolla shapes through time due to more constant and stronger selection constraints compared to species with more generalist pollination strategies. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1111/evo.13410DOI Listing
February 2018
5 Reads

Climate-driven build-up of temporal isolation within a recently formed avian hybrid zone.

Evolution 2018 02 12;72(2):363-374. Epub 2018 Jan 12.

Animal Ecology, Department of Ecology and Genetics, Norbyvägen 18d, SE-752 36 Uppsala, Sweden.

Divergence in the onset of reproduction can act as an important source of reproductive isolation (i.e., allochronic isolation) between co-occurring young species, but evidence for the evolutionary processes leading to such divergence is often indirect. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1111/evo.13404DOI Listing
February 2018
5 Reads

Antagonistic pleiotropy and mutation accumulation contribute to age-related decline in stress response.

Evolution 2018 02 10;72(2):303-317. Epub 2018 Jan 10.

Division of Biology, Kansas State University, Manhattan, Kansas 66506.

As organisms age, the effectiveness of natural selection weakens, leading to age-related decline in fitness-related traits. The evolution of age-related changes associated with senescence is likely influenced by mutation accumulation (MA) and antagonistic pleiotropy (AP). MA predicts that age-related decline in fitness components is driven by age-specific sets of alleles, nonnegative genetic correlations within trait across age, and an increase in the coefficient of genetic variance. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1111/evo.13408DOI Listing
February 2018
2 Reads

Signatures of selection in embryonic transcriptomes of lizards adapting in parallel to cool climate.

Evolution 2018 01 6;72(1):67-81. Epub 2017 Dec 6.

Department of Biology, Lund University, Sölvegatan 37, 223 62 Lund, Sweden.

Populations adapting independently to the same environment provide important insights into the repeatability of evolution at different levels of biological organization. In the 20th century, common wall lizards (Podarcis muralis) from southern and western Europe were introduced to England, north of their native range. Nonnative populations of both lineages have adapted to the shorter season and lower egg incubation temperature by increasing the absolute rate of embryonic development. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1111/evo.13397DOI Listing
January 2018
6 Reads

Convergent selection pressures drive the evolution of rhodopsin kinetics at high altitudes via nonparallel mechanisms.

Evolution 2018 01;72(1):170-186

Department of Cell & Systems Biology, University of Toronto, Toronto, Ontario M5S 3G5, Canada.

Convergent evolution in response to similar selective pressures is a well-known phenomenon in evolutionary biology. Less well understood is how selection drives convergence in protein function, and the underlying mechanisms by which this can be achieved. Here, we investigate functional convergence in the visual system of two distantly related lineages of high-altitude adapted Andean and Himalayan catfishes. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1111/evo.13396DOI Listing
January 2018
6 Reads

The evolution of genital shape variation in female cetaceans.

Evolution 2018 02 6;72(2):261-273. Epub 2017 Dec 6.

Department of Biological Sciences, Mount Holyoke College, Amherst, Massachusetts.

Male genital diversification is likely the result of sexual selection. Female genital diversification may also result from sexual selection, although it is less well studied and understood. Female genitalia are complex among whales, dolphins, and porpoises, especially compared to other vertebrates. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1111/evo.13395DOI Listing
February 2018
12 Reads

Environmental variation partitioned into separate heritable components.

Evolution 2018 01 28;72(1):136-152. Epub 2017 Nov 28.

Section of Biology and Environmental Science, Department of Chemistry and Bioscience, Aalborg University, Fredrik Bajers Vej 7H, 9220 Aalborg E, Denmark.

Trait variation is normally separated into genetic and environmental components, yet genetic factors also control the expression of environmental variation, encompassing plasticity across environmental gradients and within-environment responses. We defined four components of environmental variation: plasticity across environments, variability in plasticity, variation within environments, and differences in within-environment variation across environments. We assessed these components for cold tolerance across five rearing temperatures using the Drosophila melanogaster Genetic Reference Panel (DGRP). Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1111/evo.13391DOI Listing
January 2018
13 Reads

An evolutionary tipping point in a changing environment.

Evolution 2017 12 28;71(12):2930-2941. Epub 2017 Nov 28.

Kellogg Biological Station, Department of Plant Biology, and Program in Ecology, Evolutionary Biology and Behavior, Michigan State University, Hickory Corners, Michigan 49060.

Populations can persist in directionally changing environments by evolving. Quantitative genetic theory aims to predict critical rates of environmental change beyond which populations go extinct. Here, we point out that all current predictions effectively assume the same specific fitness function. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1111/evo.13374DOI Listing
December 2017
7 Reads

The impact of bottlenecks on microbial survival, adaptation, and phenotypic switching in host-pathogen interactions.

Evolution 2017 12 30;71(12):2803-2816. Epub 2017 Oct 30.

Department of Biology and Center for Genomics and Systems Biology, 12 Waverly Place, New York University, New York, 10003.

Microbial pathogens and viruses can often maintain sufficient population diversity to evade a wide range of host immune responses. However, when populations experience bottlenecks, as occurs frequently during initiation of new infections, pathogens require specialized mechanisms to regenerate diversity. We address the evolution of such mechanisms, known as stochastic phenotype switches, which are prevalent in pathogenic bacteria. Read More

View Article

Download full-text PDF

Source
http://doi.wiley.com/10.1111/evo.13370
Publisher Site
http://dx.doi.org/10.1111/evo.13370DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5722657PMC
December 2017
4 Reads

Digest: Stabilizing selection on an animal weapon in a wild population.

Evolution 2017 11 29;71(11):2750-2751. Epub 2017 Sep 29.

Department of Biological Sciences, Auburn University, 101 Rouse Life Sciences Building, Auburn, Alabama 36849-5407.

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1111/evo.13367DOI Listing
November 2017
5 Reads

Selection on skewed characters and the paradox of stasis.

Evolution 2017 Nov 25;71(11):2703-2713. Epub 2017 Oct 25.

CEFE UMR 5175, CNRS - Université de Montpellier - Université Paul-Valéry Montpellier - EPHE, Campus CNRS, 1919 Route de Mende, 34293 Montpellier 5, France.

Observed phenotypic responses to selection in the wild often differ from predictions based on measurements of selection and genetic variance. An overlooked hypothesis to explain this paradox of stasis is that a skewed phenotypic distribution affects natural selection and evolution. We show through mathematical modeling that, when a trait selected for an optimum phenotype has a skewed distribution, directional selection is detected even at evolutionary equilibrium, where it causes no change in the mean phenotype. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1111/evo.13368DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5959001PMC
November 2017
16 Reads

The evolution of hominoid cranial diversity: A quantitative genetic approach.

Evolution 2017 Nov 9;71(11):2634-2649. Epub 2017 Oct 9.

Buffalo Human Evolutionary Morphology Lab, Department of Anthropology, University at Buffalo, SUNY, Buffalo, New York 14261.

Hominoid cranial evolution is characterized by substantial phenotypic diversity, yet the cause of this variability has rarely been explored. Quantitative genetic techniques for investigating evolutionary processes underlying morphological divergence are dependent on the availability of good ancestral models, a problem in hominoids where the fossil record is fragmentary and poorly understood. Here, we use a maximum likelihood approach based on a Brownian motion model of evolutionary change to estimate nested hypothetical ancestral forms from 15 extant hominoid taxa. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1111/evo.13361DOI Listing
November 2017
10 Reads

Ecological opportunity alters the timing and shape of adaptive radiation.

Evolution 2017 Nov 4;71(11):2650-2660. Epub 2017 Oct 4.

Division of Infectious Diseases, School of Medicine, Emory University, Atlanta, Georgia.

The uneven distribution of diversity is a conspicuous phenomenon across the tree of life. Ecological opportunity is a prominent catalyst of adaptive radiation and therefore may alter patterns of diversification. We evaluated the distribution of shifts in diversification rates across the cichlid phylogeny and the distribution of major clades across phylogenetic space. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1111/evo.13362DOI Listing
November 2017
4 Reads

The evolution of between-species reproductive interference capability under different within-species mating regimes.

Evolution 2017 Nov 20;71(11):2721-2727. Epub 2017 Sep 20.

Department of Zoology, Graduate School of Science, Kyoto University, Sakyo, Kyoto 606-8502, Japan.

Sexual selection sometimes favors male traits that benefit their bearers, but harm their mates. The harmful effects of male traits may also extend to females of other species via heterospecific mating interactions. This could affect the coexistence of closely related species during secondary contact. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1111/evo.13359DOI Listing
November 2017
4 Reads

Assortment and the analysis of natural selection on social traits.

Evolution 2017 Nov 4;71(11):2693-2702. Epub 2017 Oct 4.

Department of Plant Sciences, University of Oxford, Oxford OX13RB, United Kingdom.

A central problem in evolutionary biology is to determine whether and how social interactions contribute to natural selection. A key method for phenotypic data is social selection analysis, in which fitness effects from social partners contribute to selection only when there is a correlation between the traits of individuals and their social partners (nonrandom phenotypic assortment). However, there are inconsistencies in the use of social selection that center around the measurement of phenotypic assortment. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1111/evo.13365DOI Listing
November 2017
6 Reads

Fitness change in relation to mutation number in spontaneous mutation accumulation lines of Chlamydomonas reinhardtii.

Evolution 2017 Dec 26;71(12):2918-2929. Epub 2017 Oct 26.

Institute of Evolutionary Biology, Ashworth Laboratories, University of Edinburgh, Edinburgh EH93FL, United Kingdom.

Although all genetic variation ultimately stems from mutations, their properties are difficult to study directly. Here, we used multiple mutation accumulation (MA) lines derived from five genetic backgrounds of the green algae Chlamydomonas reinhardtii that have been previously subjected to whole genome sequencing to investigate the relationship between the number of spontaneous mutations and change in fitness from a nonevolved ancestor. MA lines were on average less fit than their ancestors and we detected a significantly negative correlation between the change in fitness and the total number of accumulated mutations in the genome. Read More

View Article

Download full-text PDF

Source
http://doi.wiley.com/10.1111/evo.13360
Publisher Site
http://dx.doi.org/10.1111/evo.13360DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5765464PMC
December 2017
5 Reads

Many-to-one form-to-function mapping weakens parallel morphological evolution.

Evolution 2017 Nov 31;71(11):2738-2749. Epub 2017 Oct 31.

Department of Integrative Biology, One University Station C0990, University of Texas at Austin, Austin, Texas.

Evolutionary ecologists aim to explain and predict evolutionary change under different selective regimes. Theory suggests that such evolutionary prediction should be more difficult for biomechanical systems in which different trait combinations generate the same functional output: "many-to-one mapping." Many-to-one mapping of phenotype to function enables multiple morphological solutions to meet the same adaptive challenges. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1111/evo.13357DOI Listing
November 2017
12 Reads

Gene duplication and the evolution of phenotypic diversity in insect societies.

Evolution 2017 Dec 29;71(12):2871-2884. Epub 2017 Sep 29.

School of Biological Sciences, Georgia Institute of Technology, Atlanta, Georgia 30332.

Gene duplication is an important evolutionary process thought to facilitate the evolution of phenotypic diversity. We investigated if gene duplication was associated with the evolution of phenotypic differences in a highly social insect, the honeybee Apis mellifera. We hypothesized that the genetic redundancy provided by gene duplication could promote the evolution of social and sexual phenotypes associated with advanced societies. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1111/evo.13356DOI Listing
December 2017
4 Reads

No mutual mate choice for quality in zebra finches: Time to question a widely held assumption.

Evolution 2017 Nov 30;71(11):2661-2676. Epub 2017 Oct 30.

Department of Behavioural Ecology and Evolutionary Genetics, Max Planck Institute for Ornithology, 82319 Seewiesen, Germany.

Studies of mate choice typically assume that individuals prefer high quality mates and select them based on condition-dependent indicator traits. In species with biparental care, mutual mate choice is expected to result in assortative mating for quality. When assortment is not perfect, the lower quality pair members are expected to compensate by increased parental investment to secure their partner (positive differential allocation). Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1111/evo.13341DOI Listing
November 2017
5 Reads

Why does inbreeding reduce male paternity? Effects on sexually selected traits.

Evolution 2017 11 20;71(11):2728-2737. Epub 2017 Sep 20.

Division of Evolution, Ecology and Genetics, Research School of Biology, The Australian National University, Canberra, ACT 2601, Australia.

Mating with relatives has often been shown to negatively affect offspring fitness (inbreeding depression). There is considerable evidence for inbreeding depression due to effects on naturally selected traits, particularly those expressed early in life, but there is less evidence of it for sexually selected traits. This is surprising because sexually selected traits are expected to exhibit strong inbreeding depression. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1111/evo.13339DOI Listing
November 2017
5 Reads

Intraspecific adaptive radiation: Competition, ecological opportunity, and phenotypic diversification within species.

Evolution 2017 Oct 25;71(10):2496-2509. Epub 2017 Aug 25.

Department of Biology, University of North Carolina, Chapel Hill, North Carolina, 27599.

Intraspecific variation in resource-use traits can have profound ecological and evolutionary implications. Among the most striking examples are resource polymorphisms, where alternative morphs that utilize different resources evolve within a population. An underappreciated aspect of their evolution is that the same conditions that favor resource polymorphism-competition and ecological opportunity-might foster additional rounds of diversification within already existing morphs. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1111/evo.13313DOI Listing
October 2017
4 Reads

Selection on an extreme weapon in the frog-legged leaf beetle (Sagra femorata).

Evolution 2017 Nov 9;71(11):2584-2598. Epub 2017 Oct 9.

Division of Biological Sciences, University of Montana, Missoula, Montana.

Biologists have been fascinated with the extreme products of sexual selection for decades. However, relatively few studies have characterized patterns of selection acting on ornaments and weapons in the wild. Here, we measure selection on a wild population of weapon-bearing beetles (frog-legged leaf beetles: Sagra femorata) for two consecutive breeding seasons. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1111/evo.13336DOI Listing
November 2017
3 Reads

Parasitoid gene expression changes after adaptation to symbiont-protected hosts.

Evolution 2017 Nov 20;71(11):2599-2617. Epub 2017 Sep 20.

Institute of Integrative Biology, ETH Zürich, Zürich, Switzerland.

Reciprocal selection between aphids, their protective endosymbionts, and the parasitoid wasps that prey upon them offers an opportunity to study the basis of their coevolution. We investigated adaptation to symbiont-conferred defense by rearing the parasitoid wasp Lysiphlebus fabarum on aphids (Aphis fabae) possessing different defensive symbiont strains (Hamiltonella defensa). After ten generations of experimental evolution, wasps showed increased abilities to parasitize aphids possessing the H. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1111/evo.13333DOI Listing
November 2017
8 Reads