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Evolution and Selection of Quantitative Traits$
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Bruce Walsh and Michael Lynch

Print publication date: 2018

Print ISBN-13: 9780198830870

Published to Oxford Scholarship Online: September 2018

DOI: 10.1093/oso/9780198830870.001.0001

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Individual Fitness and the Measurement of Univariate Selection

Individual Fitness and the Measurement of Univariate Selection

(p.1081) 29 Individual Fitness and the Measurement of Univariate Selection
Evolution and Selection of Quantitative Traits

Bruce Walsh

Michael Lynch

Oxford University Press

This chapter examines various estimates of the fitness of an individual, focusing on statistical issues and potential sources of bias. With estimates of individual fitness in hand, one can then search for fitness-trait association, and this topic comprises the second half of the chapter. A number of metrics for describing how the phenotypic distribution of a trait is perturbed by selection are examined, again along with a discussion of statistical issues and sources of bias.

Keywords:   aster models, Bateman gradient, concave selection, convex selection, fitness elasticity, fitness landscape, fitness surface, Janzen-Stein gradients, Lande-Arnold regression, Morrissey-Sakrejda gradients, opportunity for selection, reproductive success, selection differential, selection gradient, sexual selection

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