Data from: Adaptive phenotypic plasticity and local adaptation for temperature tolerance in freshwater zooplanktonLev Y. Yampolsky, Tobias M. M. Schaer & Dieter Ebert
Many organisms have geographical distributions extending from the tropics to near polar regions or can experience up to 30°C temperature variation within the lifespan of an individual. Two forms of evolutionary adaptation to such wide ranges in ambient temperatures are frequently discussed: local adaptation and phenotypic plasticity. The freshwater planktonic crustacean Daphnia magna, whose range extends from South Africa to near arctic sites, shows strong phenotypic and genotypic variation in response to temperature. In this...
Heterogeneity in recombination rate may strongly influence genome evolution and entail methodological challenges in genomic investigations. Nevertheless, a solid understanding of these issues awaits detailed information across a broad range of taxa. Based on 282 F2 individuals and 1,872 single nucleotide polymorphisms, we characterize recombination in the threespine stickleback fish genome. We find an average genome-wide recombination rate of 3.11 cM/Mb. Crossover frequencies are dramatically elevated in the chromosome peripheries as compared to the centers,...
Data from: Local adaptation of sex-induction in a facultative sexual crustacean: insights from QTL mapping and natural population of Daphnia magnaAnne C. Roulin, Jarko Routtu, Matthew D. Hall, Tim Janicke, Isabelle Colson, Christoph R. Haag, Dieter Ebert & Jarkko Routtu
Dormancy is a common adaptation in invertebrates to survive harsh conditions. Triggered by environmental cues, populations produce resting eggs that allow them to survive temporally unsuitable conditions. Daphnia magna is a crustacean that reproduces by cyclical parthenogenesis, alternating between the production of asexual offspring and the sexual reproduction of diapausing eggs (ephippia). Prior to ephippia production, males (necessary to ensure ephippia fertilization) are produced parthenogenetically. Both the production of ephippia and the parthenogenetic production of...
Data from: Melanin-based coloration of sneaker male Atlantic salmon is linked to viability and emergence timing of their offspringLucas Marie-Orleach, Jean-Marc Roussel, Jérôme Bugeon, Julien Tremblay, Dominique Ombredane & Guillaume Evanno
The ‘good genes’ hypothesis of sexual selection predicts that male ornaments are favoured by female mate choice because male ornament reveals genetic quality. In species with different male reproductive tactics, variation in genetic quality among ‘sneaking’ males has rarely been investigated, as usually ‘sneakers’ are thought not to be chosen by females. Here we focused on the alternative reproductive tactic in Atlantic salmon (Salmo salar Linnaeus, 1758) to test whether the skin colour of sneakers...
Data from: Sex-specific evolutionary potential of pre- and postcopulatory reproductive interactions in the field cricket, Teleogryllus commodusMatthew D. Hall, Simon P. Lailvaux & Robert C. Brooks
Mate choice often depends on the properties of both sexes, such as the preference and responsiveness of the female and the sexual display traits of the male. Quantitative genetic studies, however, traditionally explore the outcome of an interaction between males and females based solely on the genotype of one sex, treating the other sex as a source of environmental variance. Here we use a half-sib breeding design in the field cricket, Teleogryllus commodus, to estimate...
Sex allocation theory is considered as a touchstone of evolutionary biology, providing some of the best supported examples for Darwinian adaptation. In particular, Hamilton’s local mate competition theory has been shown to generate precise predictions for extraordinary sex ratios observed in many separate-sexed organisms. In analogy to local mate competition, Charnov’s mating group size model predicts how sex allocation in simultaneous hermaphrodites is affected by the mating group size (i.e., the number of mating partners...
Many amphibian lineages show terrestrialization of their reproductive strategy and breeding is partially or completely independent of water. A number of causal factors have been proposed for the evolution of terrestrialized breeding. While predation has received repeated attention as a potential factor, the influence of others such as habitat has never been tested using appropriate data or methods. Using a dataset that comprises 180 amphibian species from various East African habitats, we tested whether species...
Data from: Regional environmental pressure influences population differentiation in turbot (Scophthalmus maximus)S. G. Vandamme, G. E. Maes, J. A. M. Raeymaekers, K. Cottenie, A. K. Imsland, B. Hellemans, G. Lacroix, E. Mac Aoidh, J. T. Martinsohn, P. Martínez, J. Robbens, R. Vilas & F. A. M. Volckaert
Unravelling the factors shaping the genetic structure of mobile marine species is challenging due to the high potential for gene flow. However, genetic inference can be greatly enhanced by increasing the genomic, geographic or environmental resolution of population genetic studies. Here we investigated the population structure of turbot (Scophthalmus maximus) by screening 17 random and gene-linked markers in 999 individuals at 290 geographical locations throughout the Northeast Atlantic Ocean. A seascape genetics approach with the...
Families with parental care show a parent–offspring conflict over the amount of parental investment. To date, the resolution of this conflict was modeled as being driven by either purely within-brood or between-brood competition. In reality the partitioning of parental resources within- versus between-broods is an evolving life history trait, which can be affected by parent–offspring interactions. This coevolutionary feedback between life history and family interactions may influence the evolutionary process and outcome of parent–offspring coadaptation....
Data from: Phenotypic and genetic divergence within a single whitefish form – detecting the potential for future divergencePhilipp Emanuel Hirsch, Reiner Eckmann, Claus Oppelt & Jasminca Behrmann-Godel
Human-induced nutrient input can change the selection regime and lead to the loss of biodiversity. For example, eutrophication caused speciation reversal in polymorphic whitefish populations through a flattening of littoral-pelagic selection gradients. We investigated the current state of phenotypic and genetic diversity in whitefish (Coregonus macrophthalmus) in a newly restored lake whose nutrient load has returned to pre-eutrophication levels and found that whitefish spawning at different depths varied phenotypically and genetically: individuals spawning at shallower...
Data from: A gene with major phenotypic effects as a target for selection versus homogenizing gene flowJoost A. M. Raeymaekers, Nellie Konijnendijk, Maarten H. D. Larmuseau, Bart Hellemans, Luc De Meester & Filip A. M. Volckaert
Genes with major phenotypic effects facilitate quantifying the contribution of genetic vs. plastic effects to adaptive divergence. A classical example is Ectodysplasin (Eda), the major gene controlling lateral plate phenotype in three-spined stickleback. Completely plated marine stickleback populations evolved repeatedly towards low-plated freshwater populations, representing a prime example of parallel evolution by natural selection. However, many populations remain polymorphic for lateral plate number. Possible explanations for this polymorphism include relaxation of selection, disruptive selection, or...
Data from: Cross-species infection trials reveal cryptic parasite varieties and a putative polymorphism shared among host species.Pepijn Luijckx, David Duneau, Jason P. Andras & Dieter Ebert
A parasite's host range can have important consequences for ecological and evolutionary processes but can be difficult to infer. Successful infection depends on the outcome of multiple steps and only some steps of the infection process may be critical in determining a parasites host range. To test this hypothesis, we investigated the host range of the bacterium Pasteuria ramosa, a Daphnia parasite, and determined the parasites success in different stages of the infection process. Multiple...
University of Basel12
University of Guelph1
French National Institute for Agricultural Research1
University of Fribourg1
Joint Research Centre1
Royal Belgian Institute of Natural Sciences1
University of Santiago de Compostela1
University of New Orleans1
University Medical Center Groningen1