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Maternal and additive genetic effects contribute to variation in offspring traits in a lizard

Noble, Daniel W.A.; McFarlane, S. Eryn; Keogh, J. Scott; Whiting, Martin J.

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Evolutionary responses to selection require that traits have a heritable basis, yet maternal effects (the effect of a mother's phenotype on her offspring's phenotype) can have profound effects on evolutionary processes. It is therefore essential to understand how maternal effects contribute to phenotypic variation in offspring traits and test key assumptions of additive genetic variance in evolutionary models. We measured 5 traits linked to fitness in lizards (endurance, sprint speed,...[Show more]

dc.contributor.authorNoble, Daniel W.A.
dc.contributor.authorMcFarlane, S. Eryn
dc.contributor.authorKeogh, J. Scott
dc.contributor.authorWhiting, Martin J.
dc.date.accessioned2015-12-13T22:16:04Z
dc.identifier.issn1045-2249
dc.identifier.urihttp://hdl.handle.net/1885/70687
dc.description.abstractEvolutionary responses to selection require that traits have a heritable basis, yet maternal effects (the effect of a mother's phenotype on her offspring's phenotype) can have profound effects on evolutionary processes. It is therefore essential to understand how maternal effects contribute to phenotypic variation in offspring traits and test key assumptions of additive genetic variance in evolutionary models. We measured 5 traits linked to fitness in lizards (endurance, sprint speed, snout-vent length [SVL], mass, and growth rate) and estimated the contribution of additive genetic and maternal effects in explaining variation in these traits in the Eastern water skink (Eulamprus quoyii). We estimated parentage using 6 microsatellite DNA loci from lizards taking part in a mating experiment in large seminatural enclosures and used animal models to partition variance into additive genetic and maternal effects. We found that only endurance was significantly heritable (h 2 = 0.37, 95% credible interval = 0.18-0.50), whereas all other traits were either strongly influenced by maternal effects (mass, sprint speed, SVL, and captive growth rate) or were influenced by environmental variability (wild growth rate). Our study disentangles the relative contributions of additive genetic and maternal effects in contributing to variation in offspring phenotypes and suggests that little additive genetic variance exists for traits often assumed to be heritable. Although the heritability of phenotypic traits is essential in evolutionary models, our results also highlight the important role maternal effects have in explaining variation in phenotypes.
dc.publisherOxford University Press
dc.sourceBehavioral Ecology
dc.subjectKeywords: environmental effect; fitness; genetic marker; genetic variation; growth rate; heritability; life history trait; lizard; maternal effect; natural selection; parentage; phenotype Additive genetic variance; Animal model; Endurance; Eulamprus quoyii; Growth rate; Heritability; Physiological performance; Sprint speed; Water skinks
dc.titleMaternal and additive genetic effects contribute to variation in offspring traits in a lizard
dc.typeJournal article
local.description.notesImported from ARIES
local.identifier.citationvolume25
dc.date.issued2014
local.identifier.absfor060201 - Behavioural Ecology
local.identifier.ariespublicationU3488905xPUB2382
local.type.statusPublished Version
local.contributor.affiliationNoble, Daniel W.A., Macquarie University
local.contributor.affiliationMcFarlane, S. Eryn, Uppsala University
local.contributor.affiliationKeogh, J Scott, College of Medicine, Biology and Environment, ANU
local.contributor.affiliationWhiting, Martin J., Macquarie University
local.description.embargo2037-12-31
local.bibliographicCitation.issue3
local.bibliographicCitation.startpage633
local.bibliographicCitation.lastpage640
local.identifier.doi10.1093/beheco/aru032
local.identifier.absseo970106 - Expanding Knowledge in the Biological Sciences
dc.date.updated2019-03-12T07:25:43Z
local.identifier.scopusID2-s2.0-84900861139
local.identifier.thomsonID000336486100028
CollectionsANU Research Publications

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