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11 results for “genetic turnover”
Fig. 1 MapshowingtherangeofthestudypopulationofEasternImperialEaglesinHungaryandthelocationofsampledandnotsampledterritoriesin 2003 in High Turnover Rate Revealed By Non-Invasive Genetic Analyses In An Expanding Eastern Imperial Eagle Population
Fig. 1 MapshowingtherangeofthestudypopulationofEasternImperialEaglesinHungaryandthelocationofsampledandnotsampledterritoriesin 2003 (35 ofthe 61 nesting
Fig. 2 in High Turnover Rate Revealed By Non-Invasive Genetic Analyses In An Expanding Eastern Imperial Eagle Population
Fig. 2. Firstidentification (1999, territorycodeBS-02) andre-identification (2003, BS-03) of afemale. Theterritorieswereapproximately 10 kmawayfromeachotherandtheoriginal BS-02 territorywasvacantin 2001-2002, butitwasoccupiedbyapairwithanewfemale in 2003; differentmarkingsrepresentdifferentgeneticallytaggedfemales, blackmarkings representthenestsfromtheBS-02 territory, greymarkingsrepresentnestsfromtheBS-03 territory; yearsinitalic (nestsmarkedbycircles) representnestingsiteswithoutsamples.
Spatial genetic differentiation correlates with species assemblage turnover across tropical reef fish lineages
<p><strong>Aim:</strong> Evaluating the similarity of diversity patterns across micro- to macroevolutionary scales in natural communities, such as species-genetic diversity correlations (SGDC), may inform on processes shaping community assembly. However, whether SGDCs not only hold across communities but also across lineages has never been explored so far. Here we investigated SGDCs across co-distributed taxa for different spatial components (α, β, γ), and formally tested the influence of dispersal traits on β SGDCs. <strong>Location:</strong> Western Indian Ocean</p> <p><strong>Time period:</strong> 2016–2017</p> <p><strong>Major taxa studied:</strong> Tropical reef fish species with contrasting dispersal traits</p> <p><strong>Methods:</strong> Using ddRADseq single nucleotide polymorphism (SNP) data for 20 tropical reef fishes and distribution data of 2,446 species belonging to 12 families, we analysed the correlations between within-species genetic diversity and within-family species diversity (i.e., lineage diversity) for the three spatial components (α, β, γ SGDCs). We then related the strength of β-SGDCs per species to proxies of larval dispersal abilities.</p> <p><strong>Results:</strong> We detected positive and significant lineage-based SGDC only for the β component, i.e., the families showing the greatest level of species turnover among sites contains the species with the greatest levels of genetic differentiation. We showed that the Monsoon drift mainly explained the β diversity patterns at both intraspecific and interspecific levels. Higher β-SGDCs were found for species with short pelagic larval duration and weak larval swimming capacity.</p> <p><strong>Main conclusions:</strong> Our study reveals a strong correlation between genetic and species β diversity, a result explained by the presence of a 'soft' barrier and mediated by larval dispersal processes. This suggests that vicariance and dispersal limitation are major processes shaping β-diversity patterns from microevolutionary to macroevolutionary scales in tropical reef fishes.</p>
Spatial genetic differentiation correlates with species assemblage turnover across tropical reef fish lineages
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Parasite turnover zone at secondary contact: a new pattern in host-parasite population genetics
<p>We introduce a new pattern of population genetic structure in a host-parasite system that can arise after secondary contact of previously isolated populations. Due to different generation time and therefore different tempo of molecular evolution the host and parasite populations reach different degrees of genetic differentiation during their separation (e.g. in refugia). Consequently, during the secondary contact the host populations are able to re-establish a single panmictic population across the area of contact, while the parasite populations stop their dispersal at the secondary contact zone and create a narrow hybrid zone. From the host's perspective, the parasite's hybrid zone functions on a microevolutionary scale as a "parasite turnover zone": while the hosts are passing from area A to area B, their parasites turn genetically from the area A genotypes to the area B genotypes. We demonstrate this novel pattern on a model composed of <em>Apodemus</em> mice and <em>Polyplax</em> lice by comparing maternally inherited markers (complete mitochondrial genomes, and complete genomes of vertically transmitted symbiont <em>Legionella polyplacis</em>) with SNPs derived from the louse genomic data. We discuss circumstances that may lead to this pattern and possible reasons why it has been overlooked in the studies on host parasite population genetics.</p>
Genetic and cellular/biochemical data for mouse Pycard gene differences altering mRNA turnover and IL-1b release
<p>Quantitative trait locus mapping for interleukin-1b release after inflammasome priming and activation was performed on bone marrow-derived macrophages (BMDM) from an AKRxDBA/2 strain intercross. The strongest associated locus mapped very close to the <i>Pycard</i> gene on chromosome 7, which codes for the inflammasome adaptor protein apoptosis-associated speck-like protein containing a CARD (ASC). The DBA/2 and AKR <i>Pycard</i> genes only differ at single nucleotide polymorphism (SNP) in their 3' untranslated region (UTR). DBA/2 vs. AKR BMDM had increased levels of <i>Pycard</i> mRNA expression and ASC protein, and increased inflammasome speck formation, which was associated with increased <i>Pycard</i> mRNA stability without an increased transcription rate. CRIPSR/Cas9 gene editing was performed on DBA/2 embryonic stem cells to change the <i>Pycard</i> 3'UTR SNP from the DBA/2 to the AKR allele. This single base change significantly reduced <i>Pycard</i> expression and inflammasome activity after cells were differentiated into macrophages due to reduced <i>Pycard</i> mRNA stability.</p>
Parasite turnover zone at secondary contact: a new pattern in host-parasite population genetics
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Genetic and cellular/biochemical data for mouse Pycard gene differences altering mRNA turnover and IL-1b release
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Data from: Sex chromosome turnovers and genetic drift: a simulation study
The recent advances of new genomic technologies has enabled to identify and characterize sex chromosomes in an increasing number of non-model species, revealing that many plants and animals undergo frequent sex chromosome turnovers. What evolutionary forces drive these turnovers remains poorly understood, but it was recently proposed that drift might play a more important role than generally assumed. We analyzed the dynamics of different types of turnovers using individual-based simulations, and show that when mediated by genetic drift, turnovers are usually easier to achieve than substitutions at neutral markers, but that their dynamics and relative likelihoods vary with the type of the resident and emergent sex chromosome system (XY and/or ZW), and the dominance relationships among the sex-determining factors. Focusing on turnovers driven by epistatically dominant mutations, we find that drift-mediated turnovers that preserve the heterogamety pattern are 2-4x more likely than those along which the heterogametic sex changes. This ratio nevertheless decreases along with effective population size, and can even reverse in case of extreme polygyny. This can be attributed to a "drift-induced" selective force, known to influence transitions between male and female heterogamety, but which according to our study, does not affect turnovers that preserve the heterogametic sex.
Data from: Sex chromosome turnovers and genetic drift: a simulation study
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A chemical genetic method for monitoring genome-wide dynamics of O-GlcNAc turnover on chromatin-associated proteins.
GEO Series GSE124785. Drosophila melanogaster. 38 samples. Type: Genome binding/occupancy profiling by high throughput sequencing.
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International Brain Laboratory public data
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OpenNeuro
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