Evolvability of individual traits in a multivariate context: Partitioning the additive genetic variance into common and specific components

McGuigan, Katrina and Blows, Mark W. (2010) Evolvability of individual traits in a multivariate context: Partitioning the additive genetic variance into common and specific components. Evolution, 64 7: 1899-1911. doi:10.1111/j.1558-5646.2010.00968.x


Author McGuigan, Katrina
Blows, Mark W.
Title Evolvability of individual traits in a multivariate context: Partitioning the additive genetic variance into common and specific components
Journal name Evolution   Check publisher's open access policy
ISSN 0014-3820
1558-5646
Publication date 2010-07-01
Sub-type Article (original research)
DOI 10.1111/j.1558-5646.2010.00968.x
Volume 64
Issue 7
Start page 1899
End page 1911
Total pages 13
Editor Nicholas Barton
Mark D. Rausher
Jennifer Mahar
Place of publication Lancaster, Pa., U.S.A.
Publisher Society for the Study of Evolution
Collection year 2011
Language eng
Subject C1
970106 Expanding Knowledge in the Biological Sciences
0604 Genetics
Formatted abstract
Genetic covariation among multiple traits will bias the direction of evolution. Although a trait's phenotypic context is crucial for understanding evolutionary constraints, the evolutionary potential of one (focal) trait, rather than the whole phenotype, is often of interest. The extent to which a focal trait can evolve independently depends on how much of the genetic variance in that trait is unique. Here, we present a hypothesis-testing framework for estimating the genetic variance in a focal trait that is independent of variance in other traits. We illustrate our analytical approach using two Drosophila bunnanda trait sets: a contact pheromone system comprised of cuticular hydrocarbons (CHCs), and wing shape, characterized by relative warps of vein position coordinates. Only 9% of the additive genetic variation in CHCs was trait specific, suggesting individual traits are unlikely to evolve independently. In contrast, most (72%) of the additive genetic variance in wing shape was trait specific, suggesting relative warp representations of wing shape could evolve independently. The identification of genetic variance in focal traits that is independent of other traits provides a way of studying the evolvability of individual traits within the broader context of the multivariate phenotype.
©2010 The Author(s). Journal compilation ©2010 The Society for the Study of Evolution.
Keyword Factor analysis
G-matrix
Modularity
Sexual selection
Affecting wing shape
Drosophila-melanogaster
Morphological integration
Phenotypic evolution
Covariance matrices
Quantitative genetics
Principal components
Sexual selection
Natural-selection
Pattern-formation
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Official 2011 Collection
School of Biological Sciences Publications
 
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Citation counts: TR Web of Science Citation Count  Cited 24 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 22 times in Scopus Article | Citations
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Created: Sun, 25 Jul 2010, 10:06:53 EST