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Tag Archives: genomics
Sexual selection and population fitness
Sexual selection or non-random mate choice acts to ‘filter’ out less competitive/desirable phenotypes from a population. In the presence of small effect mutation loads, i.e. small fitness differences between a mutation-free population, and one with persistent deleterious mutations, sexual selection … Continue reading
Posted in adaptation, evolution, mutation, population genetics
Tagged ecological speciation, genomics, natural selection, population genetics
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When genomes duplicate
Whole genome duplication events have played an important role in the evolutionary history of plants. Vallejo-Marín et al. (2015) describe origins of a new polyploid species, Mimulus peregrines, found on the Scottish mainland as well as the Orkney Islands. It was formed within … Continue reading
Posted in bioinformatics, evolution, genomics, natural history, plants
Tagged genomics, invasion, polyploids
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Sous les mers: cradles or museums of biodiversity?
While thinking about environmental genomics and writing this post on a recent article in Heredity, I interviewed Eric Pante.
Posted in adaptation, bioinformatics, Coevolution, evolution, genomics, interview
Tagged Evolution, genomics, Gorgonians, interview, seamounts
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Quantifying risks of consanguineous mating in humans
The efficacy of selection in purging a deleterious mutation from a randomly mating population depends on numerous factors, including dominance effects of alleles – see my previous posts. Simplistically, most new mutations are expected to be heterozygotic, and be purged … Continue reading
Procrustes Analyses in R
Procrustes transformations (i.e. a form of multidimensional scaling that allows the comparison of two data sets) have been used extensively in recent literature to assess the similarity of geographical and genetic distributions of species, following the lead of Wang et … Continue reading
Posted in genomics, howto, population genetics, R, software
Tagged data visualization, genomics, population genetics, population structure
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dN(eutralist) < dS(electionist) Part 5
The neutral theory predicts that species with small census (and effective) population sizes are subject to greater drift (or allele frequency fluctuations), and vice versa. In other words, species with larger population sizes are expected to maintain more neutral diversity … Continue reading
Posted in evolution, mutation, natural history, plants, population genetics, theory
Tagged genomics, natural selection, population genetics
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