Tag Archives: population genetics

Introgression history in sticklebacks and oaks

Posted on 1 Oct, 2015 by Arun Sethuraman

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 →

Posted in adaptation, evolution, genomics, natural history, phylogenetics, population genetics, selection, speciation, species delimitation | Tagged , , , , , | 1 Comment

Sweptaway – Part 3 – Adaptation genomics of White Sands Lizards

Posted on 24 Sep, 2015 by Arun Sethuraman

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 →

Posted in adaptation, Coevolution, evolution, genomics, natural history, population genetics, selection | Tagged , , , , , | 1 Comment

Sweptaway – Part 1

Posted on 3 Sep, 2015 by Arun Sethuraman

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 →

Posted in adaptation, evolution, genomics, mutation, population genetics, selection, speciation, theory | Tagged , , , , , | Leave a comment

And who made your beer?

Posted on 27 Aug, 2015 by Arun Sethuraman

In the spirit of it being almost Friday, and while we’re on the topic of your favorite beverages – perhaps wine puts you to sleep, couldn’t care less where it came from, but prefer the bitterness of lager beers at your … Continue reading →

Posted in adaptation, evolution, genomics, natural history, next generation sequencing, phylogenetics, population genetics, selection, speciation, yeast | Tagged , , , , | 2 Comments

Where's your wine from?

Posted on 20 Aug, 2015 by Arun Sethuraman

Human-mediated selection of yeast cultures has played a huge role in the development of numerous unique strains of Sacchromyces cerevisiae, often attributed to production of a wide variety of wines the world over. Previous studies have indicated a single domesticated … Continue reading →

Posted in domestication, evolution, genomics, horizontal gene transfer, microbiology, Molecular Ecology, the journal, next generation sequencing, phylogenetics, phylogeography, population genetics, STRUCTURE, yeast | Tagged , , , | 1 Comment

Selection scans, and the genomics of adaptive/maladaptive introgression

Posted on 6 Aug, 2015 by Arun Sethuraman

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 →

Posted in adaptation, Coevolution, evolution, genomics, Molecular Ecology, the journal, mutation, natural history, population genetics, selection, speciation, theory | Tagged , , , , | 3 Comments

Who came first – the Paleo- or Native American?

Posted on 23 Jul, 2015 by Arun Sethuraman

In yet another infamous Science vs Nature race, two studies published this Tuesday toss more cans of worms at the ongoing debate about the founding of the Americas – with disparate findings. Uh oh. Skoglund et al. Nature (2015) Genetic … Continue reading →

Posted in genomics, next generation sequencing, Paleogenomics, population genetics | Tagged , , , , | 2 Comments

IMa2p – Parallel Isolation with Migration Analyses

Posted on 16 Jul, 2015 by Arun Sethuraman

I figured that it was time to write an update on my post from a year ago on Bayesian MCMC in inferring ancestral demography. Recently, my postdoctoral advisor, Jody Hey and I released a version of the popular IMa2 program, … Continue reading →

Posted in bioinformatics, genomics, howto, software, theory | Tagged , , , , , | 1 Comment

The Butterfly Effect

Posted on 9 Jul, 2015 by Arun Sethuraman

This might just take the prize for the ‘spiciest’ story in molecular co-evolution for 2015, yet. While a lot of the press coverage sounds like caterpillar thanksgiving, the science behind this study stands for the almost incredible power of molecular phylogenetics … Continue reading →

Posted in adaptation, evolution, genomics, natural history, population genetics, selection, speciation, transcriptomics | Tagged , , , , | 1 Comment

Societal constructs, and Genetic diversity

Posted on 2 Jul, 2015 by Arun Sethuraman

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 →

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