Substantial changes in the genetic basis of tadpole morphology of Rana lessonae in the presence of predators

Kraft, P. G., Wilson, R. S., Franklin, C. E. and Blows, M. W. (2006) Substantial changes in the genetic basis of tadpole morphology of Rana lessonae in the presence of predators. Journal of Evolutionary Biology, 19 6: 1813-1818. doi:10.1111/j.1420-9101.2006.01185.x


Author Kraft, P. G.
Wilson, R. S.
Franklin, C. E.
Blows, M. W.
Title Substantial changes in the genetic basis of tadpole morphology of Rana lessonae in the presence of predators
Journal name Journal of Evolutionary Biology   Check publisher's open access policy
ISSN 1010-061X
Publication date 2006-01-01
Sub-type Article (original research)
DOI 10.1111/j.1420-9101.2006.01185.x
Volume 19
Issue 6
Start page 1813
End page 1818
Total pages 6
Place of publication Oxford
Publisher Blackwell Publishing
Language eng
Subject C1
270700 Ecology and Evolution
780105 Biological sciences
Abstract Predator-induced morphological plasticity is a model system for investigating phenotypic plasticity in an ecological context. We investigated the genetic basis of the predator-induced plasticity in Rana lessonae by determining the pattern of genetic covariation of three morphological traits that were found to be induced in a predatory environment. Body size decreased and tail dimensions increased when reared in the presence of preying dragonfly larvae. Genetic variance in body size increased by almost an order of magnitude in the predator environment, and the first genetic principal component was found to be highly significantly different between the two environments. The across environment genetic correlation for body size was significantly below 1 indicating that different genes contributed to this trait in the two environments. Body size may therefore be able to respond to selection independently in the two environments to some extent.
Keyword Genetic Variance
Morphology
Phenotypic Plasticity
Predator-induced
Quantitative Genetics
Rana Lessonae
Ecology
Evolutionary Biology
Genetics & Heredity
Swimming Performance
Principal Components
Inducible Defenses
Reaction Norms
Tail Shape
Evolution
Selection
Costs
Q-Index Code C1

 
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Created: Wed, 15 Aug 2007, 19:16:47 EST