Category Archives: population genetics

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

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Posted in evolution, genomics, natural history, population genetics, selection, societal structure | Tagged , , , , , , , | Leave a comment

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

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IBE/IBD Contour plots in R

Rob’s post from yesterday motivated me to find an alternate way of visualizing correlations between matrices of geographical or ecological data, and genetic data. I have seen plenty of Mantel, or partial Mantel tests of correlation, as well as plots … Continue reading

Posted in bioinformatics, howto, population genetics, R, software | Tagged , , , | 5 Comments

Genomic history of Eurasia

The route of modern humans out of Africa has been contentious, with archaeological and genetic finds pointing towards a route through Egypt, versus one through Ethiopia. Pagani et al. (2015) analyze the genomic admixture of individuals sampled from both Egypt … Continue reading

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Landscape genetics gets existential

I had a lot of ideas for future posts, but “landscape genetics” keeps pulling me back. Beyond the new methodology, reviews, and empirical findings, I suppose someone has to pump the brakes and get more existential. Rodney Dyer does just … Continue reading

Posted in Molecular Ecology views, Molecular Ecology, the journal, population genetics | Tagged , | 1 Comment

Old dogs, and ‘carnivorous’ pandas

It was a good fortnight for large mammals! Two recent studies attempt to date the emergence of modern canids, and offer insights into the gut microbiomes of giant pandas. Ancient Wolf Genome Reveals an Early Divergence of Domestic Dog Ancestors and … Continue reading

Posted in adaptation, evolution, genomics, metagenomics, microbiology, natural history, Paleogenomics, population genetics, speciation | Tagged , , , | Leave a comment

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 , , , | 1 Comment

A cladoceran invasion

My posts are about to take on a strong bias towards field work and interviews with the researchers kind enough to offer assistance to our lab as we embark on a Northern Hemisphere tour. Not only will we be sampling seaweeds … Continue reading

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Genomic diversity and secondary contact

Under a divergence, or isolation model, the genomes of individuals in a daughter-population are expected to harbor greater differentiation relative to its sister-population, and lower differentiation within the population (after sufficient time since divergence). Divergence thus is a mechanism of … Continue reading

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Easy as ABC

Determining the whens and hows of biological invasions using genetic data is a major goal of molecular ecology. One such tool is approximate Bayesian computation (ABC) which is being used for inferring invasion histories. In a new paper in Heredity, Benazzo et … Continue reading

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