21 Works

Data from: Plant DNA barcodes and the influence of gene flow

Yamama Naciri, Sofia Caetano & Nicolas Salamin
Success of species assignment using DNA barcodes has been shown to vary among plant lineages due to a wide range of different factors. In this study, we confirm the theoretical prediction that gene flow influences species assignment with simulations and a literature survey. We show that the genome experiencing the highest gene flow is, in the majority of the cases, the best suited for species delimitation. Our results clearly suggest that, for most angiosperm groups,...

Data from: Cryptic recombination in the ever-young sex chromosomes of Hylid frogs

Rafael F. Guerrero, Mark Kirkpatrick & Nicolas Perrin
Sex chromosomes are expected to evolve suppressed recombination, which leads to degeneration of the Y and heteromorphism between the X and Y. Some sex chromosomes remain homomorphic, however, and the factors that prevent degeneration of the Y in these cases are not understood. The homomorphic sex chromosomes of the European tree frogs (Hyla spp.) present an interesting paradox. Recombination in males has never been observed in crossing experiments, but molecular data are suggestive of occasional...

Data from: Morphological, ecological and genetic aspects associated with endemism in the Fly Orchid group

Yann Triponez, Nils Arrigo, Loïc Pellissier, Bertrand Schatz & Nadir Alvarez
The European genus Ophrys (Orchidaceae) is famous for its insect-like floral morphology, an adaptation for a pseudocopulatory pollination strategy involving Hymenoptera males. A large number of endemic Ophrys species have recently been described, especially within the Mediterranean Basin, which is one of the major species diversity hotspots. Subtle morphological variation and specific pollinator dependence are the two main perceptible criteria for describing numerous endemic taxa. However, the degree to which endemics differ genetically remains a...

Data from: Sex-specific estimates of dispersal show female philopatry and male dispersal in a promiscuous amphibian, the alpine salamander (Salamandra atra)

Véronique Helfer, Thomas Broquet & Luca Fumagalli
Amphibians display wide variations in life-history traits and life cycles that should prove useful to explore the evolution of sex-biased dispersal, but quantitative data on sex-specific dispersal patterns are scarce. Here we focused on Salamandra atra, an endemic alpine species showing peculiar life-history traits. Strictly terrestrial and viviparous, the species has a promiscuous mating system and females reproduce only every three to four years. In the present study, we provide quantitative estimates of asymmetries in...

Data from: Genetic and phenotypic population divergence on a microgeographic scale in brown trout

Rike B. Stelkens, Geoffrey Jaffuel, Matthias Escher & Claus Wedekind
Salmonid populations of many rivers are rapidly declining. One possible explanation is that habitat fragmentation increases genetic drift and reduces the populations’ potential to adapt to changing environmental conditions. We measured the genetic and eco-morphological diversity of brown trout (Salmo trutta) in a Swiss stream system, using multivariate statistics and Bayesian clustering. We found large genetic and phenotypic variation within only 40 km of stream length. Eighty-eight percent of all pairwise FST comparisons and 50%...

Data from: Bidirectional shifts in colony queen number in a socially polymorphic ant population

Jessica Purcell & Michel Chapuisat
The breeding system of social organisms affects many important aspects of social life. Some species vary greatly in the number of breeders per group, but the mechanisms and selective pressures contributing to the maintenance of this polymorphism in social structure remain poorly understood. Here, we take advantage of a genetic dataset that spans 15 years to investigate the dynamics of colony queen number within a socially polymorphic ant species. Our study population of Formica selysi...

Data from: Disruption of gene expression in hybrids of the fire ants Solenopsis invicta and Solenopsis richteri

Lino Ometto, Kenneth G. Ross, D. DeWayne Shoemaker & Laurent Keller
Transcriptome analysis is a powerful tool for unveiling the distribution and magnitude of genetic incompatibilities between hybridizing taxa. The nature of such incompatibilities is closely associated with the evolutionary histories of the parental species and may differ across tissues and between the sexes. In eusocial insects, the presence of castes that experience divergent selection regimes may result in additional distinct patterns of caste-specific hybrid incompatibilities. We analyzed levels of expression of >14,000 genes in two...

Data from: Phylogenetic plant community structure along elevation is lineage specific

Charlotte Ndiribe, Loïc Pellissier, Silvia Antonelli, Anne Dubuis, Julien Pottier, Pascal Vittoz, Antoine Guisan & Nicolas Salamin
The trend of closely related taxa to retain similar environmental preferences mediated by inherited traits suggests that several patterns observed at the community scale originate from longer evolutionary processes. While the effects of phylogenetic relatedness have been previously studied within a single genus or family, lineage-specific effects on the ecological processes governing community assembly have rarely been studied for entire communities or flora. Here, we measured how community phylogenetic structure varies across a wide elevation...

Data from: Variation in the level of aggression, chemical and genetic distance among three supercolonies of the Argentine ant in Europe

Olivier Blight, Laurence Berville, Valerie Vogel, Abraham Hefetz, Marielle Renucci, Jerome Orgeas, Erick Provost & Laurent Keller
In their invasive ranges, Argentine ant populations often form one geographically vast supercolony, genetically and chemically uniform within which there is no intraspecific aggression. Here we present regional patterns of intraspecific aggression, cuticular hydrocarbons and population genetics of 18 nesting-sites across Corsica and the French mainland. Aggression tests confirm the presence of a third European supercolony, the Corsican supercolony, which exhibits moderate to high levels of aggression, depending on nesting-sites, with the Main supercolony, and...

Data from: Phylogenetic conservatism in plant phenology

T. Jonathan Davies, Elizabeth M. Wolkovich, Nathan J. B. Kraft, Nicolas Salamin, Jenica M. Allen, Toby R. Ault, Julio L. Betancourt, Kjell Bolmgren, Elsa E. Cleland, Benjamin I. Cook, Theresa M. Crimmins, Susan J. Mazer, Gregory J. McCabe, Stephanie Pau, Jim Regetz, Mark D. Schwartz & Steven E. Travers
Phenological events – defined points in the life cycle of a plant or animal – have been regarded as highly plastic traits, reflecting flexible responses to various environmental cues. The ability of a species to track, via shifts in phenological events, the abiotic environment through time might dictate its vulnerability to future climate change. Understanding the predictors and drivers of phenological change is therefore critical. Here, we evaluated evidence for phylogenetic conservatism – the tendency...

Data from: Scale-dependent adaptive evolution and morphological convergence to climatic niche in Californian eriogonoids (Polygonaceae)

Anna Kostikova, Nicolas Salamin, Peter B. Pearman, Glenn Litsios, Sarah Burgy & Laura Milani
Aim: Macroevolutionary patterns and processes change substantially depending on levels of taxonomic and ecological organization, and the resolution of environmental and spatial variability. In comparative methods, the resolution of environmental and spatial variability often defines the number of selective regimes used to test whether phenotypic characteristics are adaptively correlated with the environment. Here, we examine how investigator choice of the number of selective regimes, determined by varying the resolution of among-species variability in the species...

Data from: Genetic compatibility affects division of labor in the Argentine ant Linepithema humile

Romain Libbrecht & Laurent Keller
Division of labor is central to the organization of insect societies. Within-colony comparisons between subfamilies of workers (patrilines or matrilines) revealed genetic effects on division of labor in many social insect species. Although this has been taken as evidence for additive genetic effects on division of labor, it has never been experimentally tested. To determine the relative roles of additive and non-additive genetic effects (e.g., genetic compatibility, epistasis and parent-of-origin imprinting effects) on worker behavior,...

Data from: The influence of social structure on brood survival and development in a socially polymorphic ant: insights from a cross-fostering experiment

Jessica Purcell & Michel Chapuisat
Animal societies vary in the number of breeders per group, which affects many socially and ecologically relevant traits. In several social insect species, including our study species Formica selysi, the presence of either one or multiple reproducing females per colony is generally associated with differences in a suite of traits such as the body size of individuals. However, the proximate mechanisms and ontogenetic processes generating such differences between social structures are poorly known. Here, we...

Data from: Sex-chromosome turnovers induced by deleterious mutation load

Olivier Blaser, Christine Grossen, Samuel Neuenschwander & Nicolas Perrin
In sharp contrast with mammals and birds, many cold-blooded vertebrates present homomorphic sex chromosomes. Empirical evidence supports a role for frequent turnovers, which replace non-recombining sex chromosomes before they have time to decay. Three main mechanisms have been proposed for such turnovers, relying either on neutral processes, sex-ratio selection, or intrinsic benefits of the new sex-determining genes (due e.g. to linkage with sexually antagonistic mutations). Here we suggest an additional mechanism, arising from the load...

Data from: The balanced-lethal system of crested newts: a ghost of sex chromosomes past?

Christine Grossen, Samuel Neuenschwander & Nicolas Perrin
Balanced lethal systems are more than biological curiosities: As theory predicts, they should quickly be eliminated through the joint forces of recombination and selection. That such systems might become fixed in natural populations poses a challenge to evolutionary theory. Here we address the case of a balanced lethal system fixed in crested newts and related species, which makes 50% of offspring die early in development. All adults are heteromorphic for chromosome pair 1. The two...

Data from: Evolutionary history of almond tree domestication in the Mediterranean basin

Malou Delplancke, Nadir Alvarez, Laure Benoit, Maria Anahi Espindola, Helene I. Joly, Samuel Neuenschwander & Nils Arrigo
Genetic diversity of contemporary domesticated species is shaped by both natural and human-driven processes. However, until now, little is known about how domestication has imprinted the variation of fruit tree species. In this study, we reconstruct the recent evolutionary history of the domesticated almond tree, Prunus dulcis, around the Mediterranean Basin, using a combination of nuclear and chloroplast microsatellites (i.e. SSRs) to investigate patterns of genetic diversity. Whereas conservative chloroplast SSRs show a widespread haplotype...

Data from: Genetic basis of adaptation in Arabidopsis thaliana: local adaptation at the seed dormancy QTL DOG1

Ilkka Kronholm, F. Xavier Picó, Carlos Alonso-Blanco, Jérôme Goudet & Juliette De Meaux
Local adaptation provides an opportunity to study the genetic basis of adaptation and investigate the allelic architecture of adaptive genes. We study DELAY OF GERMINATION 1 (DOG1), a gene controlling natural variation in seed dormancy in Arabidopsis thaliana and investigate evolution of dormancy in 41 populations distributed in four regions separated by natural barriers. Using F_ST and Q_ST comparisons, we compare variation at DOG1 with neutral markers and quantitative variation in seed dormancy. Patterns of...

Data from: Forecasting changes in population genetic structure of alpine plants in response to global warming

Flora Jay, Stéphanie Manel, Nadir Alvarez, Eric Y. Durand, Wilfried Thuiller, Rolf Holderegger, Pierre Taberlet & Olivier François
Species range shifts in response to climate and land use change are commonly forecasted with species distribution models based on species occurrence or abundance data. Although appealing, these models ignore the genetic structure of species, and the fact that different populations might respond in different ways due to adaptation to their environment. Here, we introduced ancestry distribution models, i.e., statistical models of the spatial distribution of ancestry proportions, for forecasting intra-specific changes based on genetic...

Data from: Asexual reproduction in introduced and native populations of the ant Cerapachys biroi

Daniel J. C. Kronauer, Naomi E. Pierce & Laurent Keller
Asexual reproduction is particularly common among introduced species, probably because it helps to overcome the negative effects associated with low population densities during colonization. The ant Cerapachys biroi has been introduced to tropical and subtropical islands around the world since the beginning of the last century. In this species, workers can reproduce via thelytokous parthenogenesis. Here we use genetic markers to reconstruct the history of anthropogenic introductions of C. biroi, and to address the prevalence...

Data from: The evolution of XY-recombination: sexually antagonistic selection versus deleterious mutation load

Christine Grossen, Samuel Neuenschwander & Nicolas Perrin
Recombination arrest between X and Y chromosomes, driven by sexually antagonistic genes, is expected to induce their progressive differentiation. However, in contrast to birds and mammals (which display the predicted pattern), most cold-blooded vertebrates have homomorphic sex chromosomes. Two main hypotheses have been proposed to account for this, namely high turnover rates of sex determining systems and occasional XY recombination. Using individual-based simulations, we formalize the evolution of XY recombination (here mediated by sex reversal;...

Data from: Plants and tortoises: mutations in the Arabidopsis jasmonate pathway increase feeding in a vertebrate folivore

Alia Mafli, Jérôme Goudet & Edward E. Farmer
Photosynthetic tissues, the major food source of many invertebrates and vertebrates, are well defended. Many defence traits in leaves are controlled via the jasmonate signalling pathway in which jasmonate acts as a hormone by binding to a receptor to activate responses that lead to increased resistance to invertebrate folivores. We predicted that mutations in jasmonate synthesis might also increase the vulnerability of leaves to vertebrate folivores and tested this hypothesis using the Eastern Hermann’s tortoise...

Registration Year

  • 2012
    21

Resource Types

  • Dataset
    21

Affiliations

  • University of Lausanne
    21
  • Swiss Institute of Bioinformatics
    3
  • Centre d'Ecologie Fonctionnelle et Evolutive
    2
  • French National Centre for Scientific Research
    2
  • University of Arizona
    2
  • Swiss Federal Institute for Forest, Snow and Landscape Research
    2
  • University of the Basque Country
    1
  • Estación Biológica de Doñana
    1
  • The University of Texas at Austin
    1
  • University of Georgia
    1