471 results found
    1. Evolutionary Biology
    2. Microbiology and Infectious Disease

    An updated phylogeny of the Alphaproteobacteria reveals that the parasitic Rickettsiales and Holosporales have independent origins

    Sergio A Muñoz-Gómez et al.
    Diverse sophisticated phylogenetic analyses update the phylogeny of the Alphaproteobacteria and show that the parasitic Holosporales is a derived group within the Rhodospirillales order which comprises primarily free-living alphaproteobacteria.
    1. Genetics and Genomics

    Nuclear genomic signals of the ‘microturbellarian’ roots of platyhelminth evolutionary innovation

    Christopher E Laumer et al.
    A phylogeny of all major groups of flatworms based on hundreds of genes sheds new light the early evolution of this important metazoan phylum, with particular significance for the original of vertebrate parasitism.
    1. Evolutionary Biology

    Coupling adaptive molecular evolution to phylodynamics using fitness-dependent birth-death models

    David A Rasmussen, Tanja Stadler
    A new model describes how adaptive molecular evolution shapes phylogenetic trees and can be used to estimate the fitness effects of mutations from phylogenies.
    1. Genetics and Genomics

    Firefly genomes illuminate parallel origins of bioluminescence in beetles

    Timothy R Fallon et al.
    The first genomic view of beetle luciferase evolution indicates evolutionary independence of luciferase between fireflies and click-beetles, and provide valuable datasets which will accelerate the discovery of new biotechnological tools.
    1. Evolutionary Biology

    Whole genome phylogenies reflect the distributions of recombination rates for many bacterial species

    Thomas Sakoparnig et al.
    For many bacterial species, recombination dominates genome evolution and phylogenetic patterns that have so far been assumed to reflect clonal relationships, in fact reflect variation in recombination rates across lineages.
    1. Evolutionary Biology
    2. Neuroscience

    A cerebellar substrate for cognition evolved multiple times independently in mammals

    Jeroen B Smaers et al.
    Multiple independent directional selection events on a neural substrate that underpins domain-general associative abilities partly explains independent occurrences of complex behavior in different lineages of mammals.
    1. Evolutionary Biology

    Support for a clade of Placozoa and Cnidaria in genes with minimal compositional bias

    Christopher E Laumer et al.
    Protein coding genes strongly support a sister group relationship between Placozoa and Cnidaria to the exclusion of Bilateria, contradicting previous phylogenies, which have likely been misled by pervasive compositional heterogeneity.
    1. Microbiology and Infectious Disease

    Unravelling the history of hepatitis B virus genotypes A and D infection using a full-genome phylogenetic and phylogeographic approach

    Evangelia-Georgia Kostaki et al.
    Considerable differences are observed in the global dissemination patterns of HBV-D and HBV-A, the genotypes of which have putative origins in North Africa/Middle East (HBV-D) and the Middle East/Central Asia (HBV-A).
    1. Evolutionary Biology

    A Bayesian approach to dynamic homology of morphological characters and the ancestral phenotype of jawed vertebrates

    Benedict King, Martin Rücklin
    The ancestor of all known jawed vertebrates possessed a maxilla and premaxilla and was similar in morphology to the 'maxillate placoderms' from China.
    1. Evolutionary Biology

    Oldest skeleton of a fossil flying squirrel casts new light on the phylogeny of the group

    Isaac Casanovas-Vilar et al.
    Flying squirrels may have originated earlier than previously thought and remained unchanged for almost 12 million years.

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