Category Archives: population genetics

Unbalanced population sampling and STRUCTURE

The utility and intuition offered by the program STRUCTURE, and more generally, the ‘admixture’ model of Pritchard et al. (2000) are unquestioned – with tens of thousands of citations, it retains its lead among the most popular population genetics software. … Continue reading

Posted in bioinformatics, genomics, howto, methods, population genetics, software, STRUCTURE | Tagged , , | 1 Comment

For these birds, isolation-by-distance is (almost) all in the family

Isolation by distance is one of the most fundamental processes of molecular ecology. In any finite population, the frequency of a genetic variant will change from generation to generation due to random sampling effects, which we call genetic drift. In … Continue reading

Posted in natural history, pedigree, population genetics | Tagged | Leave a comment

Artificial connectivity … have we overlooked the native range?

Invasive species are problematic throughout the world’s ecosystems, down even to their very name which incites heated debates. Every month, studies are published that describe the genetic structure and gene flow of non-native species in their introduced ranges. Often, these … Continue reading

Posted in adaptation, conservation, evolution, natural history, phylogeography, population genetics | Tagged , , , , , | Leave a comment

Humans, selection, evolution and ecological timescales … a potent cocktail

It’s been awhile since I last was able to write for TME. But, finally, I’ve stolen away some time to write about a recent study in Ecology Letters that I couldn’t put down once I started reading it. Yes, it’s about mating … Continue reading

Posted in adaptation, evolution, natural history, plants, population genetics, selection, theory | Tagged , , , | Leave a comment

Diving into chilly California waters, understanding genomic differentiation and the role of gene transfer in marine cyanophages

At this point, it’s clear: microbes are everywhere, there are a lot of them, and they are important. In fact, they are more abundant, more diverse and older than any other organism we have on this planet. In particular, cyanobacteria … Continue reading

Posted in Coevolution, evolution, genomics, horizontal gene transfer, microbiology, population genetics | Tagged , , | Leave a comment

Still ruffling feathers after all these years: Darwin’s finches and a molecular view of adaptive radiation

One of the many lovely things about molecular ecology is its ability to shine new light on old stories. The well-known case of Darwin’s finches is a classic example of adaptive radiation. These finches demonstrate a clear instance where over time, … Continue reading

Posted in adaptation, association genetics, evolution, genomics, Molecular Ecology, the journal, population genetics, RNAseq, selection, speciation | Tagged , , | Leave a comment

Building bridges across the chaos

In a new review, Eldon and co-authors (in press) attempt to build a bridge across the chaos of genetic patchiness in the sea. They i) describe the patterns characterized as chaotic genetic patchiness, ii) discuss the potential causes of these patterns and … Continue reading

Posted in evolution, genomics, mutation, natural history, next generation sequencing, phylogenetics, phylogeography, population genetics, selection | Tagged , , , | Leave a comment