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dc.contributor.author Evans, Jonathan P.
dc.contributor.author Rahman, Md. Moshiur
dc.contributor.author Gasparini, Clelia
dc.date.accessioned 2015-03-25T15:51:33Z
dc.date.available 2015-03-25T15:51:33Z
dc.date.issued 2015-03-27
dc.identifier doi:10.5061/dryad.g753g
dc.identifier.citation Evans JP, Rahman MM, Gasparini C (2015) Genotype-by-environment interactions underlie the expression of pre- and postcopulatory sexually selected traits in guppies. Journal of Evolutionary Biology 28(4): 959–972.
dc.identifier.uri http://hdl.handle.net/10255/dryad.83527
dc.description The role that genotype-by-environment interactions (GEIs) play in sexual selection has only recently attracted the attention of evolutionary biologists. Yet GEIs can have profound evolutionary implications by compromising the honesty of sexual signals, maintaining high levels of genetic variance underlying their expression, and altering patterns of genetic covariance among fitness traits. In this study, we test for GEIs in a highly sexually dimorphic freshwater fish, the guppy Poecilia reticulata. We conducted an experimental quantitative genetic study in which male offspring arising from a paternal half-sibling breeding design were assigned to differing nutritional ‘environments’ (either high or low feed levels). We then determined whether the manipulation of diet quantity influenced levels of additive genetic variance and covariance for several highly variable and condition-dependent pre- and postcopulatory sexual traits. In accordance with previous work, we found that dietary limitation had strong phenotypic effects on numerous pre- and postcopulatory sexual traits. We also report evidence for significant GEI for several of these traits, which in some cases (area of iridescence and sperm velocity) reflected a change in the rank order of genotypes across different nutritional environments (i.e. ecological crossover). Furthermore, we show that genetic correlations vary significantly between nutritional environments. Notably, a highly significant negative genetic correlation between iridescent colouration and sperm viability in the high food treatment broke down under dietary restriction. Taken together, these findings are likely to have important evolutionary implications for guppies; ecological crossover may influence sexual signal reliability in unstable (nutritional) environments and contribute towards the extreme levels of polymorphism in sexual traits typically reported for this species. Furthermore, the presence of environment-specific genetic covariance suggests that trade-offs measured in one environment may not be indicative of genetic constraints in others.
dc.relation.haspart doi:10.5061/dryad.g753g/1
dc.relation.isreferencedby doi:10.1111/jeb.12627
dc.relation.isreferencedby PMID:25818019
dc.subject Quantitative genetics
dc.subject Sexual selection
dc.subject genetic variance
dc.subject condition dependence
dc.title Data from: Genotype-by-environment interactions underlie the expression of pre- and postcopulatory sexually selected traits in guppies
dc.type Article
dwc.ScientificName Poecilia reticulata
prism.publicationName Journal of Evolutionary Biology
dryad.dansTransferDate 2018-04-25T16:15:24.375+0000
dryad.dansEditIRI https://easy.dans.knaw.nl/sword2/container/99196f06-e146-4073-b642-4ee035cfca46
dryad.dansArchiveDate 2018-04-25T18:01:31.034+0000
dryad.dashTransferDate 2019-06-27T08:11:37.071+0000
dryad.dashStoredDate 2019-07-14T14:26:52.596+0000

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