7 Works

Data from: Partitioning the effects of spatial isolation, nest habitat, and individual diet in causing assortative mating within a population of threespine stickleback

Lisa Kathryn Snowberg & Daniel I. Bolnick
Assortative mating is measured as a phenotypic or genotypic correlation between mates. Although biologists typically view assortative mating in terms of mate preference for similar partners, correlations between mates can also arise from phenotypic spatial structure arising from spatial isolation or habitat preferences. Here, we test whether diet-assortative mating within an ecologically variable population of threespine stickleback results from small-scale geographic isolation or microhabitat preference. We find evidence for assortative mating in the form of...

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: Reproductive isolation and local adaptation quantified for a chromosome inversion in a malaria mosquito

Diego Ayala, Rafael F. Guerrero & Mark Kirkpatrick
Chromosome inversions have long been thought to be involved in speciation and local adaptation. We have little quantitative information, however, about the effects that inversion polymorphisms have on reproductive isolation and viability. Here we provide the first estimates from any organism for the total amount of reproductive isolation associated with an inversion segregating in natural populations. We sampled chromosomes from 751 mosquitoes of the malaria vector Anopheles funestus along a 1421 km transect in Cameroon...

Data from: Mutation rate dynamics in a bacterial population reflect tension between adaptation and genetic load

Sébastien Wielgoss, Jeffrey E. Barrick, Olivier Tenaillon, Michael J. Wiser, W. James Dittmar, Stéphane Cruveiller, Béatrice Chane-Woon-Ming, Claudine Médigue, Richard E. Lenski & Dominique Schneider
Mutations are the ultimate source of heritable variation for evolution. Understanding how mutation rates themselves evolve is thus essential for quantitatively understanding many evolutionary processes. According to theory, mutation rates should be minimized for well-adapted populations living in stable environments, whereas hypermutators may evolve if conditions change. However, the long-term fate of hypermutators is unknown. Using a phylogenomic approach, we found that an adapting Escherichia coli population that first evolved a mutT hypermutator phenotype was...

Data from: Massive, solidified bone in the wing of a volant courting bird

Kimberly S. Bostwick, Mark L. Riccio & Julian M. Humphries
One pervasive morphological feature of tetrapods is the pipe-like, often marrow-filled, structure of the limb or long bones. This “hollow” form maximizes flexural strength and stiffness with the minimum amount of bony material, and is exemplified by truly hollow (air-filled), or pneumatic, humeri in many modern birds. High-resolution microCT scans of the wings of two male Club-winged Manakins (Machaeropterus deliciosus) uncovered a notable exception to the hollow-tube rule in terrestrial vertebrates; males exhibited solidified ulnae...

Data from: Natural variation in GL1 and its effects on trichome density in Arabidopsis thaliana

Rebecca H. Bloomer, Thomas E. Juenger & Vaughan V. Symonds
The ultimate understanding of how biological diversity arises, is maintained, and lost depends on identifying the genes responsible. Although a good deal has been discovered about gene function over the past few decades, far less is understood about gene effects; i.e., how natural variation in a gene contributes to natural variation in phenotypes. Trichome density in Arabidopsis thaliana is an ideal trait for studies of natural molecular and phenotypic variation, as trichome initiation is genetically...

Data from: Characterizing genomic variation of Arabidopsis thaliana: the roles of geography and climate

Jesse R. Lasky, David L. Des Marais, John K. McKay, James H. Richards, Thomas E. Juenger & Timothy H. Keitt
Arabidopsis thaliana inhabits diverse climates and exhibits varied phenology across its range. Although A. thaliana is an extremely-well studied model species, the relationship between geography, growing season climate and its genetic variation is poorly characterized. We used redundancy analysis (RDA) to quantify the association of genomic variation [214,051 single nucleotide polymorphisms (SNPs)] with geography and climate among 1,003 accessions collected from 447 locations in Eurasia. We identified climate variables most correlated with genomic variation, which...

Registration Year

  • 2012
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Resource Types

  • Dataset
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Affiliations

  • The University of Texas at Austin
    7
  • Howard Hughes Medical Institute
    1
  • University of Lausanne
    1
  • French National Centre for Scientific Research
    1
  • Colorado State University
    1
  • Massey University
    1
  • Cornell University
    1
  • Michigan State University
    1
  • University of California, Davis
    1