Category Archives: howto

Phylogenetic trees in R using ggtree

Recently, one R package which I like to use for visualizing phylogenetic trees got published. It’s called ggtree, and as you might guess from the name it is based on the popular ggplot2 package. With ggtree, plotting trees in R has … Continue reading

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Posted in bioinformatics, howto, phylogenetics, R | Tagged , , , | 1 Comment

Handling microbial contamination in NGS data

Until recently, I had given little thought to the potential for unwanted microbial contamination in high throughput sequence data. I suspect that if you’re a molecular ecologist who doesn’t primarily study microbes or work with ancient DNA, you’re in a … Continue reading

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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

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

Video Tutorial: editing R plots in Adobe Illustrator

Adobe Illustrator is a powerful tool for creating and editing figures; unfortunately, it’s also really intimidating. So today at The Molecular Ecologist we’re trying something a little different: a screen-capture video tutorial about using Adobe Illustrator to enhance and edit plots … Continue reading

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On (mis)interpreting STRUCTURE/ADMIXTURE results

STRUCTURE, ADMIXTURE and other similar software are among the most cited programs in modern population genomics. They are algorithms that estimate allele frequencies and admixture proportions under the premise that sampled genotypes are derived from one of “K” ancestral populations, … Continue reading

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

Making Maps in R, volume 2: ggplots

The open-source statisical programming environment R is truly a Swiss Army knife for molecular ecology. With the right code, R can processes genetic data and trait measurements, analyze how genetic variants relate to traits, reconstruct phylogenetic trees, and illustrate the … Continue reading

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Posted in howto, R, software | Tagged , | 6 Comments

10 simple rules for designing a scientific poster

Conference season is upon us! Around the world, thousands of scientists face a daunting task: designing a scientific poster. It should be sleek, yet informative; eye-catching, yet professional; and most of all it should attract the attention of your future … Continue reading

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Posted in conferences, howto | Tagged , , , | 7 Comments