22 Works

Data from: Rapid and unpredictable changes of the G-matrix in a natural bird population over 25 years

Mats Björklund, Arild Husby & Lars Gustafsson
Knowledge of the genetic variances and covariances of traits (the G-matrix) is fundamental for the understanding of evolutionary dynamics of populations. Despite its essential importance in evolutionary studies, empirical tests of the temporal stability of the G-matrix in natural populations are few. We used a 25-year-long individual-based field study on almost 7000 breeding attempts of the collared flycatcher (Ficedula albicollis) to estimate the stability of the G-matrix over time. Using animal models to estimate G...

Data from: Fine-grained adaptive divergence in an amphibian: genetic basis of phenotypic divergence and the role of non-random gene flow in restricting effective migration among wetlands

Alex Richter-Boix, María Quintela, Marcin Kierczak, Marc Franch & Anssi Laurila
Adaptive ecological differentiation among sympatric populations is promoted by environmental heterogeneity, strong local selection and restricted gene flow. High gene flow, on the other hand, is expected to homogenize genetic variation among populations and therefore prevent local adaptation. Understanding how local adaptation can persist at the spatial scale at which gene flow occurs has remained an elusive goal, especially for wild vertebrate populations. Here, we explore the roles of natural selection and nonrandom gene flow...

Data from: Sex chromosome linked genetic variance and the evolution of sexual dimorphism of quantitative traits

Arild Husby, Holger Schielzeth, Wolfgang Forstmeier, Lars Gustafsson & Anna Qvarnström
Theory predicts that sex chromsome linkage should reduce intersexual genetic correlations thereby allowing the evolution of sexual dimorphism. Empirical evidence for sex linkage has come largely from crosses and few studies have examined how sexual dimorphism and sex linkage are related within outbred populations. Here we use data on an array of different traits measured on over 10,000 individuals from two pedigreed populations of birds (collared flycatcher and zebra finch) to estimate the amount of...

Data from: Sequencing of the needle transcriptome from Norway spruce (Picea abies Karst L.) reveals lower substitution rates, but similar selective constraints in gymnosperms and angiosperms

Jun Chen, Severin Uebbing, Niclas Gyllenstrand, Ulf Lagercrantz, Martin Lascoux & Thomas Källman
BACKGROUND: A detailed knowledge about spatial and temporal gene expression is important for understanding both the function of genes and their evolution. For the vast majority of species, transcriptomes are still largely uncharacterized and even in those where substantial information is available it is often in the form of partially sequenced transcriptomes. With the development of next generation sequencing, a single experiment can now simultaneously identify the transcribed part of a species genome and estimate...

Data from: Stepwise colonization of the Andes by Ruddy Ducks and the evolution of novel β-globin variants

Violeta Muñoz-Fuentes, Maria Cortazar-Chinarro, Maria Lozano & Kevin G. McCracken
Andean uplift played a key role in Neotropical bird diversification, yet past dispersal and genetic adaptation to high-altitude environments remain little understood. Here we use multilocus population genetics to study population history and historical demographic processes in the ruddy duck (Oxyura jamaicensis), a stiff-tailed diving duck comprising three subspecies distributed from Canada to Tierra del Fuego and inhabiting wetlands from sea level to 4500 m in the Andes. We sequenced the mitochondrial DNA, four autosomal...

Data from: Challenges and strategies in transcriptome assembly and differential gene expression quantification. A comprehensive in silico assessment of RNA-seq experiments.

Nagarjun Vijay, Jelmer W. Poelstra, Axel Künstner & Jochen B. W. Wolf
Transcriptome Shotgun Sequencing (RNA-seq) has been readily embraced by geneticists and molecular ecologists alike. As with all high-throughput technologies, it is critical to understand which analytic strategies are best suited and which parameters may bias the interpretation of the data. Here we use a comprehensive simulation approach to explore how various features of the transcriptome (complexity, degree of polymorphism π, alternative splicing), technological processing (sequencing error ε, library normalization) and bioinformatic workflow (de novo vs....

Data from: Selection in a fluctuating environment leads to decreased genetic variation and facilitates the evolution of phenotypic plasticity

Lára R. Hallsson & Mats Björklund
Changes in the environment are expected to induce changes in the quantitative genetic variation, which influences the ability of a population to adapt to environmental change. Furthermore, environmental changes are not constant in time, but fluctuate. Here we investigate the effect of rapid, continuous and/or fluctuating temperature changes in the seed beetle Callosobruchus maculatus, using an evolution experiment followed by a split brood experiment. In line with expectations, individuals responded in a plastic way and...

Data from: Vertebral architecture in the earliest stem tetrapods

Stephanie E. Pierce, Per E. Ahlberg, John R. Hutchinson, Julia L. Molnar, Sophie Sanchez, Paul Tafforeau & Jennifer A. Clack
The construction of the vertebral column has been used as a key anatomical character in defining and diagnosing early tetrapod groups. Rhachitomous vertebrae - in which there is a dorsally placed neural arch and spine, an anteroventrally placed intercentrum and paired, posterodorsally placed pleurocentra - have long been considered the ancestral morphology for tetrapods. Nonetheless, very little is known about vertebral anatomy in the earliest stem tetrapods, as most specimens remain trapped in surrounding matrix,...

Data from: Evolution of Acoustic and Visual Signals in Asian Barbets

Alejandro Gonzalez-Voyer, Robert-J. Den Tex, Alberto Castelló, Jennifer A. Leonard & R.-J. Den Tex
The study of animal communication systems is an important step towards gaining greater understanding of the processes influencing diversification because signals often play an important role in mate choice and can lead to reproductive isolation. Signal evolution can be influenced by a diversity of factors such as biophysical constraints on the emitter, the signalling environment, or selection to avoid heterospecific matings. Furthermore, because signals can be costly to produce, trade-offs may exist between different types...

Data from: QTL and quantitative genetic analysis of beak morphology reveals patterns of standing genetic variation in an Estrildid finch

Ulrich Knief, Holger Schielzeth, Bart Kempenaers, Hans Ellegren & Wolfgang Forstmeier
The intra- and interspecific diversity of avian beak morphologies is one of the most compelling examples for the power of natural selection acting on a morphological trait. The development and diversification of the beak has also become a textbook example for evolutionary developmental biology, and variation in expression levels of several genes is known to causally affect beak shape. However, until now no genomic polymorphisms have been identified that are related to beak morphology in...

Data from: The B-matrix harbours significant and sex-specific constraints on the evolution of multi-character sexual dimorphism

Thomas P. Gosden, Krishna-Lila Shastri, Paolo Innocenti & Stephen F. Chenoweth
The extent to which sexual dimorphism can evolve within a population depends on an interaction between sexually divergent selection and constraints imposed by a genetic architecture that is shared between males and females. The degree of constraint within a population is normally inferred from the intersexual genetic correlation, rmf. However, such bivariate correlations ignore the potential constraining effect of genetic covariances between other sexually co-expressed traits. Using the fruit fly Drosophila serrata, a species that...

Data from: Geographic variation in corticosterone response to chronic predator stress in tadpoles

Emma Dahl, Germán Orizaola, Svante Winberg & Anssi Laurila
Chronic stress often affects growth and development negatively and these effects are often mediated via glucocorticoid hormones, which elevate during stress. We investigated latitudinal variation in corticosterone (CORT)-response to chronic predator stress in Rana temporaria tadpoles along a 1500 km latitudinal cline in Sweden tadpoles, in a laboratory experiment. We hypothesised that more time-constrained high-latitude populations have evolved a lower CORT-response to chronic stress to maintain higher growth under stressful conditions. Southern tadpoles had higher...

Data from: Sexual selection affects the evolution of lifespan and ageing in the decorated cricket Gryllodes sigillatus

Catharine Ruth Archer, Nick J. Royle, Scott K. Sakaluk, Felix Zajitschek & John Hunt
Recent work suggests that sexual selection can influence the evolution of ageing and lifespan by shaping the optimal timing and relative costliness of reproductive effort in the sexes. We use inbred lines of the decorated cricket, Gryllodes sigillatus, to estimate the genetic (co)variance between age-dependent reproductive effort, lifespan and ageing within and between the sexes. Sexual selection theory predicts that males should die sooner and age more rapidly than females. However, a reversal of this...

Data from: Disentangling the roles of history and local selection in shaping clinal variation of allele frequencies and gene expression in Norway spruce (Picea abies)

Jun Chen, Thomas Källman, Xiaofei Ma, Niclas Gyllenstrand, Giusi Zaina, Michele Morgante, Jean Bousquet, Andrew Eckert, Jill Wegrzyn, David B. Neale, Ulf Lagercrantz, Martin Lascoux & David Neale
Understanding the genetic basis of local adaptation is challenging due to the subtle balance among conflicting evolutionary forces that are involved in its establishment and maintenance. One system with which to tease apart these difficulties are clines in adaptive characters. Here we analyzed genetic and phenotypic variation in bud set, a highly heritable and adaptive trait, among 18 populations of Norway spruce (Picea abies), arrayed along a latitudinal gradient ranging from 47°N to 68°N. We...

Data from: Female preference for male courtship effort can drive the evolution of male mate choice

Sandra Helen South, Göran Arnqvist & Maria R. Servedio
The evolution of male mate choice is constrained by costs of choice in species with a male-biased operational sex ratio. Previous theoretical studies have shown that significant benefits of male choice are required, e.g., by mating with more fecund females, in order for these costs to be offset and a male preference to spread. In a series of population genetic models we show the novel effect that male mating preference, expressed as a bias in...

Data from: Mosaic structure of native ant supercolonies

Perttu Seppä, Helena Johansson, Niclas Gyllenstrand, Snaebjorn Palsson & Pekka Pamilo
According to the inclusive fitness theory, some degree of positive relatedness is required for the evolution and maintenance of altruism. However, ant colonies are sometimes large interconnected networks of nests which are genetically homogenous entities, causing a putative problem for the theory. We studied spatial structure and genetic relatedness in two supercolonies of the ant Formica exsecta, by using nuclear and mitochondrial markers. We show that there may be multiple pathways to supercolonial social organization...

Data from: Selection in a fluctuating environment and the evolution of sexual dimorphism in the seed beetle Callosobruchus maculatus

Lára R. Hallsson & Mats Björklund
Temperature changes in the environment, which realistically include environmental fluctuations, can create both plastic and evolutionary responses of traits. Sexes might differ in either or both of these responses for homologous traits, which in turn has consequences for sexual dimorphism and its evolution. Here we investigate both immediate changes in and the evolution of sexual dimorphism in response to a changing environment (with and without fluctuations) using the seed beetle Callosobruchus maculatus. We investigate sex...

Data from: Heterozygosity-fitness correlations in zebra finches: microsatellite markers can be better than their reputation

Wolfgang Forstmeier, Holger Schielzeth, Jakob C. Mueller, Hans Ellegren & Bart Kempenaers
Numerous studies have reported associations between heterozygosity in microsatellite markers and fitness-related traits (heterozygosity-fitness correlations, HFCs). However, it has often been questioned whether HFCs reflect general inbreeding depression, because a small panel of microsatellite markers does not reflect very well an individual’s inbreeding coefficient (F) as calculated from a pedigree. Here we challenge this prevailing view. Due to chance events during Mendelian segregation, an individual’s realized proportion of the genome that is identical by descent...

Data from: The HypoMethylated Partial Restriction (HMPR) method reduces the repetitive content of genomic libraries in Norway spruce (Picea abies)

Hanna Larsson, Emanuele De Paoli, Michele Morgante, Martin Lascoux & Niclas Gyllenstrand
To evaluate the usefulness of Reduced Representation Libraries (RRL) in species with large and highly repetitive genomes such as conifers, we employed Hypomethylated Partial Restriction (HMPR) on the genome of Norway spruce (Picea abies). The HMPR method preferentially removes the repetitive fraction of the genome, which is commonly hypermethylated. Hence, RRLs should be enriched for the hypomethylated gene space. For comparison a standard shotgun library was constructed and samples of the respective libraries were obtained...

Data from: MHC diversity, malaria and lifetime reproductive success in collared flycatchers

Jacek Radwan, Wieslaw Babik, Magdalena Zagalska-Neubauer, Lars Gustavsson, Mariusz Cichoń, Katarzyna Kulma & Joanna Sendecka
Major Histocompatibility Complex (MHC) genes encode proteins involved in the recognition of parasite-derived antigens. Their extreme polymorphism is presumed to be driven by coevolution with parasites. Host-parasite coevolution was also hypothesised to optimize within-individual MHC diversity at the intermediate level. Here, we use unique data on lifetime reproductive success (LRS) of female collared flycatchers to test whether LRS is associated with within-individual MHC class II diversity. We also examined the association between MHC and infection...

Data from: Inferring the demographic history of European Ficedula flycatcher populations

Niclas Backström, Glenn-Peter Sætre & Hans Ellegren
Background: Inference of population and species histories and population stratification using genetic data is important for discriminating between different speciation scenarios and for correct interpretation of genome scans for signs of adaptive evolution and trait association. Here we use data from 24 intronic loci re-sequenced in population samples of two closely related species, the pied flycatcher and the collared flycatcher. Results: We applied Isolation-Migration models, assignment analyses and estimated the genetic differentiation and diversity between...

Data from: Marked host specificity and lack of phylogeographic population structure of Campylobacter jejuni in wild birds

Petra Griekspoor, Frances M. Colles, Noel D. McCarthy, Philip M. Hansbro, Chris Ashhurst-Smith, Björn Olsen, Dennis Hasselquist, Martin C. J. Maiden & Jonas Waldenström
Zoonotic pathogens often infect several animal species, and gene flow among populations infecting different host species may affect the biological traits of the pathogen including host specificity, transmissibility and virulence. The bacterium Campylobacter jejuni is a widespread zoonotic multihost pathogen, which frequently causes gastroenteritis in humans. Poultry products are important transmission vehicles to humans, but the bacterium is common in other domestic and wild animals, particularly birds, which are a potential infection source. Population genetic...

Registration Year

  • 2012
    22

Resource Types

  • Dataset
    22

Affiliations

  • Uppsala University
    22
  • Swedish University of Agricultural Sciences
    4
  • Max Planck Institute for Ornithology
    3
  • Estación Biológica de Doñana
    1
  • University of Newcastle Australia
    1
  • Linnaeus University
    1
  • University of Queensland
    1
  • Lund University
    1
  • University of North Carolina
    1
  • University of Cambridge
    1