No, evolutionary biology doesn’t need a rethink

Suggestions that we need a new evolutionary synthesis because of phenomenon X pop up like weeds in biology. It’s nice to see some of my favorite evolutionary geneticists – Greg Wray, Hopi Hoekstra, Douglas Futuyma, Richard Lenski, Trudy Mackay, Dolph Schluter and Joan Strassman – make a strong case that the fundamentals of evolutionary theory can accommodate the hot new phenomenon of the day (e.g, epigenetics), and that genes are not passé:

The evolutionary phenomena championed by Laland and colleagues are already well integrated into evolutionary biology, where they have long provided useful insights. Indeed, all of these concepts date back to Darwin himself, as exemplified by his analysis of the feedback that occurred as earthworms became adapted to their life in soil…

Finally, diluting what Laland and colleagues deride as a ‘gene-centric’ view would de-emphasize the most powerfully predictive, broadly applicable and empirically validated component of evolutionary theory. Changes in the hereditary material are an essential part of adaptation and speciation. The precise genetic basis for countless adaptations has been documented in detail, ranging from antibiotic resistance in bacteria to camouflage coloration in deer mice, to lactose tolerance in humans…

All four phenomena that Laland and colleagues promote are ‘add-ons’ to the basic processes that produce evolutionary change: natural selection, drift, mutation, recombination and gene flow. None of these additions is essential for evolution, but they can alter the process under certain circumstances. For this reason they are eminently worthy of study.

h/t Ed Yong

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