Nonlinear selection and the evolution of variances and covariances for continuous characters in an anole

Nonlinear selection and the evolution of variances and covariances for continuous characters in an anole

The pattern of genetic variances and covariances among characters, summarized in the additive genetic variance-covariance matrix, G, determines how a population will respond to linear natural selection. However, G itself also evolves in response to selection. In particular, we expect that, over time...

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Bibliographic Details
Published in:Journal of evolutionary biology Vol. 23; no. 2; pp. 407 - 421
Main Authors: REVELL, L.J, MAHLER, D.L, SWEENEY, J.R, SOBOTKA, M, FANCHER, V.E, LOSOS, J.B
Format: Journal Article
Language:English
Published: Oxford, UK Oxford, UK : Blackwell Publishing Ltd 01-02-2010
Blackwell Publishing Ltd
Subjects:
Animals
Anolis
Anolis cristatellus
Biological Evolution
correlational selection
Evolution
Evolutionary biology
Fitness
G-matrix
genetic constraint
Genetic diversity
Genetic Variation
Genotype & phenotype
Lacertilia
Lizards - genetics
Multivariate analysis
Natural selection
P-matrix
Quantitative Trait, Heritable
Reptiles & amphibians
Selection, Genetic
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Summary:The pattern of genetic variances and covariances among characters, summarized in the additive genetic variance-covariance matrix, G, determines how a population will respond to linear natural selection. However, G itself also evolves in response to selection. In particular, we expect that, over time, G will evolve correspondence with the pattern of multivariate nonlinear natural selection. In this study, we substitute the phenotypic variance-covariance matrix (P) for G to determine if the pattern of multivariate nonlinear selection in a natural population of Anolis cristatellus, an arboreal lizard from Puerto Rico, has influenced the evolution of genetic variances and covariances in this species. Although results varied among our estimates of P and fitness, and among our analytic techniques, we find significant evidence for congruence between nonlinear selection and P, suggesting that natural selection may have influenced the evolution of genetic constraint in this species.
Bibliography:http://dx.doi.org/10.1111/j.1420-9101.2009.01911.x
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ISSN:1010-061X
1420-9101
DOI:10.1111/j.1420-9101.2009.01911.x