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    1. Cell Biology
    2. Evolutionary Biology

    Phylogenetic divergence of cell biological features

    Michael Lynch
    Cell biological features are subject to stochastic forces of mutation and random genetic drift, which together cause lineages exposed to identical selection pressures to diverge, and mean phenotypes to deviate from expectations under optimizing selection.
    1. Evolutionary Biology
    2. Microbiology and Infectious Disease

    Asynchrony between virus diversity and antibody selection limits influenza virus evolution

    Dylan H Morris et al.
    Despite the virus' error prone polymerase, influenza virus antigenic evolution is rare, even in previously immune hosts, virus replication occurs before producing new antibodies.
    1. Evolutionary Biology
    2. Physics of Living Systems

    Environmental heterogeneity can tip the population genetics of range expansions

    Matti Gralka, Oskar Hallatschek
    Environmental heterogeneity can dramatically reduce the efficacy of selection and alter the neutral evolutionary dynamics in microbial range expansions.
    1. Evolutionary Biology

    Privatisation rescues function following loss of cooperation

    Sandra Breum Andersen et al.
    A population of pathogenic bacteria is found to respond to the loss of cooperation by privatising an essential function.
    1. Epidemiology and Global Health
    2. Evolutionary Biology

    A transmission-virulence evolutionary trade-off explains attenuation of HIV-1 in Uganda

    François Blanquart et al.
    Analysis of epidemiological data reveals that viral loads in newly HIV-1 infected individuals in Uganda have declined for two decades, and evolutionary modelling shows that attenuation of the virus explains this decline.
    1. Genetics and Genomics

    Genetic variation in adaptability and pleiotropy in budding yeast

    Elizabeth R Jerison et al.
    Substantial heritable genetic variation in adaptability and the pleiotropic consequences of adaptation exists in budding yeast, and can be explained by a combination of fitness and specific segregating alleles.
    1. Ecology
    2. Evolutionary Biology

    Point of View: Towards a mechanistic foundation of evolutionary theory

    Michael Doebeli et al.
    A description of evolution that is based on birth-death processes, and in which fitness is at most a derived quantity, is advocated.
    1. Evolutionary Biology

    Selection on mutators is not frequency-dependent

    Yevgeniy Raynes, Daniel Weinreich
    Contrary to intuition that the evolutionary fate of mutation rate modifying alleles is frequency-dependent, neither the strength nor the sign of selection on modifiers depends on initial frequency.
    1. Epidemiology and Global Health
    2. Microbiology and Infectious Disease

    Comprehensive mapping of adaptation of the avian influenza polymerase protein PB2 to humans

    YQ Shirleen Soh et al.
    Complete mapping of human-adaptive mutations to the avian influenza PB2 protein shows how selection at key molecular interfaces combines with evolutionary accessibility to shape viral host adaptation.
    1. Genetics and Genomics

    Rare variants contribute disproportionately to quantitative trait variation in yeast

    Joshua S Bloom et al.
    Rare, evolutionarily recent variants have larger effect sizes and are more likely to decrease fitness, providing evidence that quantitative traits in yeast have evolved under purifying selection.