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194 results for “Evolutionary adaptation”
Data and supplementary materials from: Large genetic divergence underpins cryptic local adaptation across ecological and evolutionary gradients
<p><span>Environmentally covarying local adaptation is a form of cryptic local adaptation in which the covariance of the genetic and environmental effects on a phenotype obscures the divergence between locally adapted genotypes. Here, we systematically document the magnitude and drivers of the genetic effect (V<sub>G</sub>) for two forms of environmentally covarying local adaptation: counter- and cogradient variation. Using a hierarchical Bayesian meta-analysis, we calculated the overall effect size of V<sub>G</sub> as 1.05 and 2.13 for populations exhibiting countergradient or cogradient variation, respectively. These results indicate that the genetic contribution to phenotypic variation represents a 1.05 to 2.13 standard deviation change in trait value between the most disparate populations depending on if populations are expressing counter- or cogradient variation. We also found that while there was substantial variance among abiotic and biotic covariates, the covariates with the largest mean effects were temperature (2.41) and gamete size (2.81). Our results demonstrate the pervasiveness and large genetic effects underlying environmentally covarying local adaptation in wild populations and highlights the importance of accounting for these effects in future studies.</span></p>
Evolutionary divergence of potential drought adaptations between two subspecies of an annual plant: Are trait combinations facilitated, independent, or constrained?
<p><b><span>Premise</span></b><span>: Whether drought-adaptation mechanisms tend to evolve together, evolve independently, and/or evolve constrained by genetic architecture is incompletely resolved, particularly for water relations traits besides gas exchange. We addressed this issue in two subspecies of </span><i>Clarkia xantiana</i><span> (Onagraceae), California winter annuals that separated approximately 65,000 years ago and are adapted, partly by differences in flowering time, to native ranges differing in precipitation.</span></p> <p><b><span>Methods: </span></b><span>In these subspecies and in recombinant inbred lines (RILs) from a cross between them we scored traits related to drought adaptation (timing of seed germination and of flowering; succulence; pressure-volume curve parameters) in common environments.</span></p> <p><b><span>Results: </span></b><span>The subspecies native to more arid environments (<i>parviflora</i>) exhibited slower seed germination in saturated conditions, earlier flowering, and greater succulence, likely indicating superior drought avoidance, drought escape, and dehydration resistance via water storage, respectively. The other subspecies (<i>xantiana</i>) had lower osmotic potential at full turgor and lower water potential at turgor loss, implying superior dehydration tolerance. Genetic correlations among RILs suggest facilitated evolution of some trait combinations and independence of others. Where genetic correlations exist, subspecies differences fell along them, with the exception of differences in succulence and turgor loss point. In that case, subspecies difference overcame genetic correlations, possibly reflecting strong selection and/or antagonistic genetic correlations with other traits. </span></p> <p><b><span>Conclusions:</span></b><span> <i>Clarkia xantiana </i>subspecies' differ in multiple mechanisms of drought adaptation. Genetic architecture generally does not seem to have constrained the evolution of these mechanisms, and it may have facilitated the evolution of some of trait combinations. </span></p>
Data from: Detection of evolutionary conserved and accelerated genomic regions related to adaptation to thermal niches in Anolis lizards
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Data from: Disentangling evolutionary, environmental and morphological drivers of plant anatomical adaptations to drought and cold in Himalayan graminoids
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Data from: The genomic landscape of rapid repeated evolutionary adaptation to toxic pollution in wild fish
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Single cell RNA sequencing provides clues for the developmental genetic basis of Syngnathidae’s evolutionary adaptations
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Demographic feedbacks during evolutionary rescue can slow or speed adaptive evolution
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Evolutionary divergence of potential drought adaptations between two subspecies of an annual plant: Are trait combinations facilitated, independent, or constrained?
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Data from: Evolutionary constraints in host shifts: limited adaptation of <em>Plutella xylostella</em> to cardenolide-defended <em>Erysimum cheiranthoides</em>
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Data from: Demography and adaptation promoting evolutionary transitions in a mammalian genus that diversified during the Pleistocene
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Data from: Asymmetric micro-evolutionary responses in a warming world: Heat-driven adaptation enhances metal tolerance, but not vice versa
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Data from: Cross-biome patterns in soil microbial respiration predictable from evolutionary theory on thermal adaptation
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Data from: The evolution of egg shape in birds: Evolutionary constraints and adaptations
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Data and supplementary materials from: Large genetic divergence underpins cryptic local adaptation across ecological and evolutionary gradients
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Data from: Plasticity versus evolutionary divergence: what causes habitat partitioning in urban-adapted birds?
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Transcriptomic findings light on mechanisms of marine and terrestrial evolutionary adaptation of Rhizophoraceae plants
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Data from: The evolutionary genomics of adaptation to stress in wild rhizobium bacteria
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Data from: Evolutionary adaptations of TRPA1 thermosensitivity and skin thermoregulation in vertebrates
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Data from: Adapting to an increasingly stressful environment: Experimental evidence for ‘micro-evolutionary priming’
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Encapsulation of ribozymes inside model protocells leads to faster evolutionary adaptation
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Allen Brain Atlas
Allen Brain Atlas is an Allen Institute collection of brain map atlases, datasets, APIs, and analysis tools covering mouse, human, and non-human primate brain resources.
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DANDI Archive for NWB datasets
DANDI is a BRAIN Initiative archive for publishing and sharing neurophysiology data, including electrophysiology, optophysiology, and behavioral data packaged as NWB and related standards.
International Brain Laboratory public data
The International Brain Laboratory public data releases expose standardized mouse decision-making experiments, including Neuropixels recordings, widefield calcium imaging, behavior, and session metadata accessed through the ONE API.
OpenNeuro
OpenNeuro is a free, open platform for sharing neuroimaging datasets, with public search, dataset pages, and download paths for web, S3, DataLad, and the OpenNeuro CLI.