46 Works

Data for: Sexual conflict drives micro- and macroevolution of sexual dimorphism in immunity

David Berger, Basabi Bagchi, Quentin Corbel, Imroze Khan, Ellen Payne, Devshuvam Banerji, Johanna Liljestrand-Rönn, Ivain Martinossi-Allibert, Julian Baur, Ahmed Sayadi, Elina Immonen, Göran Arnqvist & Irene Söderhäll
Background: Sexual dimorphism in immunity is believed to reflect sex-differences in reproductive strategies and trade-offs between competing life history demands. Sexual selection can have major effects on mating rates and sex-specific costs of mating and may thereby influence sex-differences in immunity as well as associated host-pathogen dynamics. Yet, experimental evidence linking the mating system to evolved sexual dimorphism in immunity are scarce and the direct effects of mating rate on immunity are not well established....

Do genetic differences in growth thermal reaction norms maintain genetic variation in timing of diapause induction?

Erlend Fossen, Joost Raeymaekers & Sigurd Einum
An optimal timing for diapause induction through the sexual production of dormant propagules is expected in organisms with temporary populations. Yet, empirical studies often find high within-population genetic variation in the sexual production of such propagules, suggesting that this is a common feature of such organisms. Here, we hypothesize that genetic variation in the propensity to produce dormant propagules, Pd, is maintained by a genotype-by-environment interaction in clonal reproductive rates, where fast-growing genotypes within an...

OPT data from: A novel cis-regulatory element drives early expression of Nkx3.2 in the gnathostome primary jaw joint

Jake Leyhr, Laura Waldmann, Beata Filipek-Górniok, Hanqing Zhang, Amin Allalou & Tatjana Haitina
The acquisition of movable jaws was a major event during vertebrate evolution. The role of NK3 homeobox 2 (Nkx3.2) transcription factor in patterning the primary jaw joint of gnathostomes (jawed vertebrates) is well known, however, knowledge about its regulatory mechanism is lacking. In this study, we report a proximal enhancer element of Nkx3.2 that is deeply conserved in most gnathostomes but undetectable in the jawless hagfish and lamprey. This enhancer is active in the developing...

How model assumptions affect our understanding of the evolution of ectomycorrhizal symbiosis in fungi

Sanea Sheikh, Faheema Khan, Mohammad Bahram & Martin Ryberg
The kingdom of Fungi comprises one of the most diverse set of functions and species. Fungi are heterotrophic and can obtain their nutrients from living organisms (biotrophic) or dead matter (saprotrophic). One of the most common biotrophic lifestyles is mycorrhizal association, including ectomycorrhiza (ECM) that involves the largest number of mycorrhizal fungi and is essential for nutrient uptake and health of many stand forming trees. Despite our growing understanding of the diversity of ECM fungi,...

Invasion and maintenance of meiotic drivers in populations of ascomycete fungi

Ivain Martinossi-Allibert, Carl Veller, S. Lorena Ament-Velásquez, Aaron A. Vogan, Claus Rueffler & Hanna Johannesson
Meiotic drivers are selfish genetic elements that are able to become over-represented among the products of meiosis. This transmission advantage makes it possible for them to spread in a population even when they impose fitness costs on their host organisms. Whether a meiotic driver can invade a population, and subsequently reach fixation or coexist in a stable polymorphism, depends on the one hand on the biology of the host organism, including its life-cycle, mating system,...

Elevated temperature increases genome-wide selection on de novo mutations

David Berger, Josefine Stångberg, Julian Baur & Richard Walters
Adaptation in new environments depends on the amount of genetic variation available for evolution, and the efficacy by which natural selection discriminates among this variation. However, whether some ecological factors reveal more genetic variation, or impose stronger selection pressures than others, is typically not known. Here, we apply enzyme kinetic theory to show that rising global temperatures are predicted to intensify natural selection throughout the genome by increasing the effects of DNA sequence variation on...

Non-existence of a minimizer to the Hartree-Fock functional

Michael Melgaard & Mattias Enstedt

Cytb + ND2 Prinia gracilis complex

Per Alstrom, Pamela Rasmussen, Canwei Xia, Lijun Zhang, Jesper Magnusson, Arya Shafaeipour & Urban Olsson
Prinias (Cisticolidae: Prinia) are resident warblers of open areas across Africa and Asia and include many polytypic species whose species limits have not been seriously reevaluated recently. Based on an integrative taxonomic analysis of morphology, song, and mitochondrial DNA (mtDNA), we suggest that 2 species should be recognized in the Graceful Prinia (Prinia gracilis) complex. In addition, our morphological analyses show the existence of a well-marked undescribed form in southeastern Somalia, which we name herein...

Long- and short-read metabarcoding technologies reveal similar spatio-temporal structures in fungal communities

Brendan Furneaux, Mohammad Bahram, Anna Rosling, Nourou Yorou & Martin Ryberg
Fungi form diverse communities and play essential roles in many terrestrial ecosystems, yet there are methodological challenges in taxonomic and phylogenetic placement of fungi from environmental sequences. To address such challenges we investigated spatio-temporal structure of a fungal community using soil metabarcoding with four different sequencing strategies: short amplicon sequencing of the ITS2 region (300--400\ bp) with Illumina MiSeq, Ion Torrent Ion S5, and PacBio RS II, all from the same PCR library, as well...

Supporting data: Can molecular dynamics simulations improve the structural accuracy and virtual screening performance of GPCR models?

Jon Kapla, Ismael Rodriguez Espigares, Flavio Ballante, Jana Selent & Jens Carlsson
The determination of G protein-coupled receptor (GPCR) structures at atomic resolution has improved understanding of cellular signaling and will accelerate the development of new drug candidates. However, experimental structures still remain unavailable for a majority of the GPCR family. GPCR structures and their interactions with ligands can also be modelled computationally, but such predictions have limited accuracy. In this work, we explored if molecular dynamics (MD) simulations could be used to refine the accuracy of...

thermofeel

Chloe Brimicombe, Claudia Di Napoli, Tiago Quintino, Florian Pappenberger, Rosalind Cornforth & Hannah Cloke

Data from: Go large or go conical: allometric trajectory of an early Cambrian acrotretide brachiopod

Zhiliang Zhang, Timothy Topper, Yanlong Chen, Luke Stroze, Feiyang Chen, Lars Holmer, Glenn Brock & Zhifei Zhang
Acrotretides are extinct micromorphic brachiopods that exhibited considerable morphological variation during their rapid evolution in the early Palaeozoic. The plano-conical shells of acrotretides are distinct in comparison to other brachiopod groups and despite their diversity and abundance in early Palaeozoic communities, their origins, early evolution, life history and phylogeny are poorly understood. Here, we employ advanced geometric morphometrics to quantitatively investigate ontogenetic variation and allometry in the ventral valve of the oldest known acrotretide species...

Tooth morphology elucidates shark evolution across the end-Cretaceous mass extinction

Mohamad Bazzi, Nicolás Campione, Per Ahlberg, Henning Blom & Benjamin Kear
Sharks (Selachimorpha) are iconic marine predators that have survived multiple mass extinctions over geologic time. Their prolific fossil record is represented mainly by isolated shed teeth, which provide the basis for reconstructing deep time diversity changes affecting different selachimorph clades. By contrast, corresponding shifts in shark ecology, as measured through morphological disparity, have received comparatively limited analytical attention. Here, we use a geometric morphometric approach to comprehensively examine tooth morphologies in multiple shark lineages traversing...

Rhagoletis cingulata and Rhagoletis cerasi genome comparison

Thomas Wolfe, Daniel Bruzzese, Lisa Klasson, Erika Corretto, Sonja Lečić, Christian Stauffer, Jeffrey Feder & Hannes Schuler
Wolbachia is a maternally inherited obligate endosymbiont that can induce a wide spectrum of effects in its host, ranging from mutualism to reproductive parasitism. At the genomic level, recombination within and between strains, transposable elements, and horizontal transfer of strains between host species make Wolbachia an evolutionarily dynamic bacterial system. The invasive cherry fruit fly Rhagoletis cingulata arrived in Europe from North America ~40 years ago, where it now co-occurs with the native cherry pest...

eNOS/NO and their role in modifying the vascular barrier in retinopathy - Source data

Dominic Love, Takeshi Ninchoji & Lena Claesson-Welsh
Background: Hypoxia and consequent production of vascular endothelial growth factor A (VEGFA) promote blood vessel leakiness and edema in ocular diseases. Anti-VEGFA therapeutics may aggravate hypoxia; therefore, therapy development is needed. Methods: Oxygen-induced retinopathy was used as a model to test the role of nitric oxide (NO) in pathological neovascularization and vessel permeability. Suppression of NO formation was achieved chemically using L-NMMA, or genetically, in endothelial NO synthase (eNOS) serine to alanine (S1176A) mutant mice....

Major population splits coincide with episodes of rapid climate change in a forest-dependent bird

Vera-Maria Warmuth, Malcolm Burgess, Marko Mägi, Toni Laaksonen, Andrea Manica, Andreas Nord, Craig Primmer, Glenn-Peter Sætre, Wolfgang Winkel & Hans Ellegren
Climate change influences population demography by altering patterns of gene flow and reproductive isolation. Direct mutation rates offer the possibility for accurate dating on the within-species level but are currently only available for a handful of vertebrate species. Here, we use the first directly estimated mutation rate in birds to study the evolutionary history of pied flycatchers (Ficedula hypoleuca). Using a combination of demographic inference and environmental niche modelling, we show that all major population...

A machine learning approach to integrating genetic and ecological data in tsetse flies (Glossina pallidipes) for spatially explicit vector control planning

Anusha Bishop, Giuseppe Amatulli, Chaz Hyseni, Evlyn Pless, Rosemary Bateta, Winnie Okeyo, Paul Mireji, Sylvance Okoth, Imna Malele, Grace Murilla, Serap Aksoy & Norah Saarman
Introduction - Control of vector populations is an effective strategy for addressing vector-borne disease transmission. Effective vector control requires knowledge of habitat use and connectivity. Our goal was to improve this knowledge for the tsetse species Glossina pallidipes, a vector of animal African trypanosomiasis, which is a wasting disease in livestock and represents a serious socioeconomic burden across sub-Saharan Africa. Methods and Results - We used random forest regression to: (i) Build and integrate models...

Data for: Predation risk and the evolution of a vertebrate stress response: parallel evolution of stress reactivity and sexual dimorphism

Jerker Vinterstare, Gustaf MO Ekelund Ugge, Kaj Hulthén, Alexander Hegg, Christer Brönmark, P Anders Nilsson, U Ronja Zellmer, Marcus Lee, Varpu Pärssinen, Yongcui Sha, Caroline Björnerås, Huan Zhang, Raphael Gollnisch, Simon David Herzog, Lars-Anders Hansson, Martin Škerlep, Nan Hu, Emma Johansson & R Brian Langerhans
Predation risk is often invoked to explain variation in stress responses. Yet, the answers to several key questions remain elusive, including: 1) how predation risk influences the evolution of stress phenotypes, 2) the relative importance of environmental versus genetic factors in stress reactivity, and 3) sexual dimorphism in stress physiology. To address these questions, we explored variation in stress reactivity (ventilation frequency) in a post-Pleistocene radiation of live-bearing fish, where Bahamas mosquitofish (Gambusia hubbsi) inhabit...

Data from: Compensatory growth in C. elegans is regulated by a thermosensitive TRP channel and increases reproductive fitness

Zuzana Sekajova, Elena Rosa, Foteini Spagopoulou, PanagiotisIoannis Zervakis & Martin Lind
Animals are often not growing at the maximum rate, but can compensate for a bad start of life by further increasing growth rate. While this compensatory growth is widespread, its direct fitness consequences are seldom investigated and its genetic basis is unknown. We investigated the genetic regulation, as well as fitness and lifespan consequences of compensatory growth in response to temperature, using C. elegans knockout of the thermo-sensitive TRP ion channel TRPA-1, involved in temperature...

Lobbying in Scandinavia

Øyvind Ihlen, Anne Skorkjær Binderkrantz & PerOla Öberg

Unexpected cryptic species among streptophyte algae most distant to land plants

Iker Irisarri, Tatyana Darienko, Thomas Pröschold, Janine M. R. Fürst-Jansen, Mahwash Jamy & Jan De Vries
Streptophytes are one of the major groups of the green lineage (Chloroplastida or Viridiplantae). During one-billion-years of evolution, streptophytes have radiated into an astounding diversity of uni- and multicellular green algae as well as land plants. Most divergent from land plants is a clade formed by Mesostigmatophyceae, Spirotaenia spp., and Chlorokybophyceae. All three lineages are species-poor and the Chlorokybophyceae consist of a single described species, Chlorokybus atmophyticus. In this study, we used phylogenomic analyses to...

Data from: Spring and autumn phenology in an understorey herb are uncorrelated and driven by different factors

Elsa Fogelström, Giulia Zacchello, Daniela Guasconi, Johan Petter Dahlgren & Johan Ehrlén
Premise: Climate warming has altered the start and end of growing seasons in temperate regions. Ultimately, these changes occur at the individual level, but little is known about how previous seasonal life history events, temperature, and plant resource state simultaneously influence the spring and autumn phenology of plant individuals. Methods: We studied the relationships between the timing of leaf-out and shoot senescence over three years in a natural population of the long-lived understory herb Lathyrus...

VCF-file for: The effects of GC-biased gene conversion on patterns of genetic diversity among and across butterfly genomes

Niclas Backström
Recombination reshuffles the alleles of a population through crossover and gene conversion. These mechanisms have considerable consequences on the evolution and maintenance of genetic diversity. Crossover, for example, can increase genetic diversity by breaking the linkage between selected and nearby neutral variants. Bias in favor of G or C alleles during gene conversion may instead promote the fixation of one allele over the other, thus decreasing diversity. Mutation bias from G or C to A...

ITS and nrLSU DNA sequence data from four species of Coreomyces (Laboulbeniomycetes)

Henrik Sundberg, Åsa Kruys, Johannes Bergsten & Stefan Ekman
The genus Coreomyces (Laboulbeniaceae, Laboulbeniomycetes, Ascomycota) includes minute parasites on water boatmen (Corixidae, Hemiptera, Insecta). This taxonomic study is primarily based on freshly sampled corixids infected by Coreomyces from Sweden, although a few samples from Denmark and Turkey were also included. All records were verified using DNA sequence data from the internal transcribed spacer region and large subunit of the nuclear ribosomal DNA repeat region. We recognise four species, two of which are new to...

Links between boreal forest management, soil fungal communities and belowground carbon sequestration

Karolina Jörgensen, Gustaf Granath, Joachim Strengbom & Björn Lindahl
Forest management has a potential to alter belowground carbon storage. However, the underlying mechanisms, and the relative importance of carbon input and decomposition in regulation of soil carbon dynamics are poorly understood. We examined whether interactive effects of forest fertilization and thinning on carbon stocks in the topsoil of boreal forests were linked to changes in fungal community composition, biomass, and enzyme activities, in a long-term fertilization and thinning experiment distributed across 29 Pinus sylvestris...

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  • 2021
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Affiliations

  • Uppsala University
    46
  • Lund University
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  • University of Oslo
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  • Swedish University of Agricultural Sciences
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  • Norwegian University of Science and Technology
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  • University of Cambridge
    2
  • University of Gothenburg
    2
  • University of East Anglia
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  • Ludwig Maximilian University of Munich
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