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Tag Archives: population structure
Genomics of domestication in chicken and cattle
Two recent studies attempt to understand the process of adaptive evolution in domestication and artificial selection by characterizing (a) sweeps, and their association with phenotypes in extant hybrid lines (Sheng et al. 2015), and (b) phylogenomic position of an extinct … Continue reading
Posted in adaptation, bioinformatics, domestication, evolution, genomics, natural history, Paleogenomics, phylogeography, population genetics, selection, speciation, STRUCTURE
Tagged domestication, ecological speciation, Evolution, hybridization, natural selection, population genetics, population structure
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Introgression history in sticklebacks and oaks
Speciation theory has many monikers for differential gene flow – migration, introgression, admixture, hybridization, secondary contact. As a homogenizing process, gene flow at large acts to reduce differentiation between populations post-divergence. However, selection and demography affect the rates of gene … Continue reading
Sweptaway – Part 3 – Adaptation genomics of White Sands Lizards
Recent colonization events offer juicy insights into the adaptive evolution of species in response to natural selection of novel habitats – however, they are confounded by demographic changes (eg. bottlenecks, differential migration). In a recent study, Laurent et al. (2015) … Continue reading
Sweptaway – Part 2
Numerous methods have been developed over the last few years for the detection of selective sweeps (hard and soft – see my previous post). This week, we look at three new studies that (a) compare existing methods to detect sweeps … Continue reading
Posted in adaptation, bioinformatics, evolution, genomics, methods, population genetics, selection, software, theory
Tagged genomics, methods, natural selection, population structure
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Sweptaway – Part 1
Brace yourselves for a series of new posts on selection, especially with articles from the special Molecular Ecology issue on “Detecting selection in natural populations: making sense of genome scans and towards alternative solutions” starting to roll out! Selective sweeps … Continue reading
Selection scans, and the genomics of adaptive/maladaptive introgression
Natural selection, and the adaptive evolution of hybrid reproductive incompatibilities post divergence are known to be major drivers of speciation. At the phenotype level, these manifest as fitness differences between introgressing populations. At the genomic level, speciation “genes” or “islands” … Continue reading
Societal constructs, and Genetic diversity
While we grapple with numerous discoveries of variation in genomic diversity in humans, interest has subsequently risen in understanding their causes/results. Two recent papers describe experiments to determine (a) the effects of marital rules (who gets to marry whom) on … Continue reading
The Kennewick, and the Oase I
Last week was glorious for ancient DNA enthusiasts – here are some quick blurbs on findings from genomic analyses of the Kennewick man, and the Oase I individual. The ancestry and affiliations of Kennewick Man, Rasmussen et al. (2015) Nature DOI: … Continue reading
Posted in evolution, genomics, Paleogenomics, population genetics
Tagged gene flow, genomics, Homo sapiens, population genetics, population structure
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