PMID: 16637501Apr 28, 2006Paper

Quantitative genetics of plastron shape in slider turtles (Trachemys scripta)

Evolution; International Journal of Organic Evolution
Erin M MyersJohn K Tucker

Abstract

Shape variation is widespread in nature and embodies both a response to and a source for evolution and natural selection. To detect patterns of shape evolution, one must assess the quantitative genetic underpinnings of shape variation as well as the selective environment that the organisms have experienced. Here we used geometric morphometrics to assess variation in plastron shell shape in 1314 neonatal slider turtles (Trachemys scripta) from 162 clutches of laboratory-incubated eggs from two nesting areas. Multivariate analysis of variance indicated that nesting area has a limited role in describing plastron shape variation among clutches, whereas differences between individual clutches were highly significant, suggesting a prominent clutch effect. The covariation between plastron shape and several possible maternal effect variables (yolk hormone levels and egg dimensions) was assessed for a subset of clutches and found to be negligible. We subsequently employed several recently proposed methods for estimating heritability from shape variables, and generalized a univariate approach to accommodate unequal sample sizes. Univariate estimates of shape heritability based on Procrustes distances yielded large values for both nesting...Continue Reading

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Citations

Oct 18, 2007·Proceedings. Biological Sciences·Gábor Domokos, Péter L Várkonyi
Dec 20, 2015·Journal of Morphology·Carolina ImhoffPatricia Amavet
Feb 28, 2009·Evolution; International Journal of Organic Evolution·José M GómezFrancisco Perfectti
Apr 11, 2012·Evolution; International Journal of Organic Evolution·Neus Martínez-AbadíasChristian Peter Klingenberg
Sep 4, 2010·Evolution; International Journal of Organic Evolution·Kenneth D AngielczykGretchen R Miller
Nov 4, 2010·Journal of Evolutionary Biology·T LeinonenJ Merilä
May 21, 2010·Evolution; International Journal of Organic Evolution·Christian Peter KlingenbergDerek A Roff
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Aug 11, 2010·Nature Reviews. Genetics·Christian Peter Klingenberg

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