Category Archives: adaptation

Experimental harvesting reduces gene expression variation

Human activities represent unique selective pressures for natural populations. This is especially true for fish species where we routinely harvest individuals from the wild, i.e., through fishing. It has been recognized for some time that overfishing can result in population … Continue reading

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Posted in adaptation, conservation, evolution, genomics, transcriptomics | Tagged , | 1 Comment

The largest mammalian genome is not polyploid

Some 40 million years ago in South America, following the arrival of the common ancestor of caviomorph rodents from the Old World, big changes were afoot. Specifically, the caviomorph colonists were beginning to give rise to an extant evolutionary progeny … Continue reading

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Posted in adaptation, bioinformatics, genomics, RNAseq, transcriptomics | Leave a comment

This new review explains why soft sweeps are the bane — and the baseline — of ecological genetics

If you’ve done ecological genetics research in the last decade, you’ve almost certainly cited a series of papers by Pleuni Pennings and Joachim Hermisson, which broke down the problem of soft selective sweeps. Pennings and Hermisson have revisited soft sweeps … Continue reading

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When less might be more: The evolution of reduced genomes

The advent of affordable genome sequencing has provided us with a wealth of data. Researchers have sequenced everything from Escherichia coli (4.6 Mbp genome size), to sea urchins (810 Mbp), chimpanzees (3.3 Gbp), and humans (3.2 Gbp). Then there are the … Continue reading

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Posted in adaptation, Coevolution, evolution, genomics, microbiology, population genetics, selection | Tagged , , , | Leave a comment

Shared patterns of genomic diversity across populations of distantly related taxa

Genomic diversity is shaped by the complex interplay between the effects of genetic drift and natural selection among populations. Several of these effects, especially those of linked selection at neutral sites, adaptive introgression, and barriers to migration (often called “genomic … Continue reading

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Posted in adaptation, bioinformatics, birds, evolution, genomics, population genetics, selection | Tagged , , , , , | Leave a comment

Molecular adaptation in a deep-sea alien…*ahem* amphipod

Space: the final frontier…or is it? I was inspired Jeremy’s post yesterday to talk about that deep dark abyss that takes up the vast majority of our mostly blue planet. For the record, I’m in agreement with the assessments for the … Continue reading

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Posted in adaptation, evolution, genomics, Molecular Ecology, the journal, next generation sequencing | Tagged , , | Leave a comment

To RADseq or not to RADseq?

It’s a cliche to say that we live in a moment of unprecedented possibility for molecular ecology, as high-throughput sequencing methods drive the cost of collecting DNA sequence data ever lower. But at the same time, it’s a tricky moment, … Continue reading

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Posted in adaptation, association genetics, genomics, methods, next generation sequencing, selection | Tagged , , , , | 7 Comments