Tag Archives: isolation by distance

Clinal genomic variation in Drosophila species

Two recent manuscripts describe adaptive evolutions to clinal/latitudinal variations in Drosophila species to supplement a growing wealth of recent studies on geographic variation and adaptive evolution in natural populations of fruitflies (eg. see Kao et al. 2015, Zhao et al. … Continue reading

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What’s the most replicated finding in population genetics?

DrugMonkey tells a tale of a specific finding in addiction research — that rats provided with an intravenous drip of cocaine solution will push a lever to self-administer the drug — which has been replicated countless times over the decades. … Continue reading

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Adapting to the new wave of isolation by environment

Isolation by environment, not distance, explains the genetic relationship between an avian taxon among Madrean Sky Islands, according to a new study appearing in Molecular Ecology by Manthey and Moyle. The authors throw the kitchen sink of new analyses at a combination … Continue reading

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SpaceMix, and a brief history of Spatial Genetics

Incorporating spatial data to inform studies of the population demography of a species has a long history of interest. From inferring geographical clines in Principal Components Analyses (Menozzi et al. 1978), using location data as “informative priors” during model-based estimation … Continue reading

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Isolation by environment explains why the grass isn’t always greener

Ever since Sewall Wright introduced isolation by distance in 1943, the interplay between genetic differentiation and geographic distance has been a foundational, sometimes frustrating, aspect of population genetics studies. But distance isn’t just distance. The walk to my car isn’t any longer when … Continue reading

Posted in methods, Molecular Ecology, the journal, population genetics | Tagged , , , | 2 Comments

Genes … in … space!

It’s something of a classic result in human population genomics: Go out and genotype thousands of people at thousands of genetic markers. (This is getting easier to do every day.) Then summarize the genetic variation at your thousands of markers … Continue reading

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Isolating isolation by distance

Update, 29 Jan 2015: This post has been edited to remove a video clip from the movie “Chinatown,” which was jarring and really just unnecessary, as pointed out in the comments. At its most basic level, population genetics is about … Continue reading

Posted in methods, population genetics | Tagged , , , , | 12 Comments