Journal
EVOLUTION
Volume 69, Issue 5, Pages 1101-1112Publisher
WILEY
DOI: 10.1111/evo.12641
Keywords
Direct selection; indirect selection; kin selection; multilocus selection
Categories
Funding
- European Research Council [ERC-2009-AdG-250152]
- National Science Foundation [DEB 1255777]
- Division Of Environmental Biology
- Direct For Biological Sciences [1255777] Funding Source: National Science Foundation
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Evolutionary biologists have an array of powerful theoretical techniques that can accurately predict changes in the genetic composition of populations. Changes in gene frequencies and genetic associations between loci can be tracked as they respond to a wide variety of evolutionary forces. However, it is often less clear how to decompose these various forces into components that accurately reflect the underlying biology. Here, we present several issues that arise in the definition and interpretation of selection and selection coefficients, focusing on insights gained through the examination of selection coefficients in multilocus notation. Using this notation, we discuss how its flexibilitywhich allows different biological units to be identified as targets of selectionis reflected in the interpretation of the coefficients that the notation generates. In many situations, it can be difficult to agree on whether loci can be considered to be under direct versus indirect selection, or to quantify this selection. We present arguments for what the terms direct and indirect selection might best encompass, considering a range of issues, from viability and sexual selection to kin selection. We show how multilocus notation can discriminate between direct and indirect selection, and describe when it can do so.
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