13 Works

Data from: The relative importance of genetic and nongenetic inheritance in relation to trait plasticity in Callosobruchus maculatus

Lára R. Hallsson, Stephen F. Chenoweth & Russell Bonduriansky
A trait’s response to natural selection will reflect the nature of the inheritance mechanisms that mediate the transmission of variation across generations. The relative importance of genetic and nongenetic mechanisms of inheritance is predicted to be related to the degree of trait plasticity, with nongenetic inheritance playing a greater role in the cross generational transmission of more plastic traits. However, this prediction has never been tested. We investigated the influence of genetic effects and nongenetic...

Data from: Joint allelic effects on fitness and metric traits

Katrina McGuigan & Mark W. Blows
Theoretical explanations of empirically observed standing genetic variation, mutation, and selection suggest that many alleles must jointly affect fitness and metric traits. However, there are few direct demonstrations of the nature and extent of these pleiotropic associations. We implemented a mutation accumulation (MA) divergence experimental design in Drosophila serrata to segregate genetic variants for fitness and metric traits. By exploiting naturally occurring MA line extinctions as a measure of line-level total fitness, manipulating sexual selection,...

Data from: Coalescent and biophysical models of stepping-stone gene flow in Neritid snails

Eric D. Crandall, Eric A. Treml & Paul H. Barber
Marine species in the Indo-Pacific have ranges that can span thousands of kilometers, yet studies increasingly suggest that mean larval dispersal distances are less than historically assumed. Gene flow across these ranges must therefore rely to some extent on larval dispersal among intermediate “stepping-stone” populations in combination with long-distance dispersal far beyond the mean of the dispersal kernel. We evaluate the strength of stepping-stone dynamics by employing a spatially explicit biophysical model of larval dispersal...

Data from: Evolutionary optimum for male sexual traits characterized using the multivariate Robertson–Price Identity

Matthieu Delcourt, Mark W. Blows, J. David Aguirre & Howard D. Rundle
Phenotypes tend to remain relatively constant in natural populations, suggesting a limit to trait evolution. Although stationary phenotypes suggest stabilizing selection, directional selection is more commonly reported. However, selection on phenotypes will have no evolutionary consequence if the traits do not genetically covary with fitness, a covariance known as the Robertson–Price Identity. The nature of this genetic covariance determines if phenotypes will evolve directionally or whether they reside at an evolutionary optimum. Here, we show...

Data from: Interspecific competition alters nonlinear selection on offspring size in the field

Dustin J. Marshall & Keyne Monro
Offspring size is one of the most important life-history traits with consequences for both the ecology and evolution of most organisms. Surprisingly, formal estimates of selection on offspring size are rare, and the degree to which selection (particularly nonlinear selection) varies among environments remains poorly explored. We estimate linear and nonlinear selection on offspring size, module size, and senescence rate for a sessile marine invertebrate in the field under three different intensities of interspecific competition....

Data from: Sexually antagonistic genetic variance for fitness in an ancestral and a novel environment

Matthieu Delcourt, Mark W. Blows & Howard D. Rundle
The intersex genetic correlation for fitness (rwfm), a standardized measure of the degree to which male and female fitness covary genetically, has consequences for important evolutionary processes, but few estimates are available and none have explored how it changes with environment. Using a half-sibling breeding design, we estimated the genetic (co)variance matrix (G) for male and female fitness, and the resulting rwfm,in Drosophila serrata. Our estimates were performed in two environments: the laboratory yeast food...

Data from: Quantitative genetics of female mate preferences in an ancestral and a novel environment

Matthieu Delcourt, Mark W. Blows & Howard D. Rundle
A female’s mate preference is a potentially complex function relating variation in multiple male phenotypes with her probability of accepting individual males as a mate. Estimating the quantitative genetic basis of preference functions within a population is empirically challenging yet key to understanding preference evolution. We employed a recently described approach that uses random-coefficient mixed models in the analysis of function-valued traits. Using a half-sibling breeding design in a laboratory-adapted Drosophila serrata population, we estimated...

Data from: The B-matrix harbours significant and sex-specific constraints on the evolution of multi-character sexual dimorphism

Thomas P. Gosden, Krishna-Lila Shastri, Paolo Innocenti & Stephen F. Chenoweth
The extent to which sexual dimorphism can evolve within a population depends on an interaction between sexually divergent selection and constraints imposed by a genetic architecture that is shared between males and females. The degree of constraint within a population is normally inferred from the intersexual genetic correlation, rmf. However, such bivariate correlations ignore the potential constraining effect of genetic covariances between other sexually co-expressed traits. Using the fruit fly Drosophila serrata, a species that...

Data from: Stretched to the limit; can a short pelagic larval duration connect adult populations of an Indo-Pacific diadromous fish (Kuhlia rupestris)?

Pierre Feutry, Alan Vergnes, Damien Broderick, Josie Lambourdière, Philippe Keith & Jennifer R. Ovenden
Freshwater species on tropical islands face localized extinction and the loss of genetic diversity. Their habitats can be ephemeral due to variability in freshwater run-off and erosion. Even worse, anthropogenic effects on these ecosystems are intense. Most of these species are amphidromous or catadromous (i.e. their life cycle includes a marine larval phase), which buffers them against many of these effects. A long pelagic larval duration (PLD) was thought to be critical to ensure the...

Data from: The biogeography of marine invertebrate life histories

Dustin J. Marshall, Patrick J. Krug, Elena K. Kupriyanova, Maria Byrne & Richard B. Emlet
Biologists have long sought to identify and explain patterns in the diverse array of marine life histories. The most famous speculation about such patterns is Gunnar Thorson’s suggestion that species producing planktonic larvae are rarer at higher latitudes (Thorson’s rule). Although some elements of Thorson’s rule have proven incorrect, other elements remain untested. With a wealth of new life-history data, statistical approaches, and remote-sensing technology, new insights into marine reproduction can be generated. We gathered...

Data from: Fine-scale genetic population structure in a mobile marine mammal: inshore bottlenose dolphins in Moreton Bay, Australia

Ina C. Ansmann, Guido J. Parra, Janet M. Lanyon & Jennifer M. Seddon
Highly mobile marine species in areas with no obvious geographical barriers are expected to show low levels of genetic differentiation. However, small-scale variation in habitat may lead to resource polymorphisms and drive local differentiation by adaptive divergence. Using nuclear microsatellite genotyping at 20 loci, and mitochondrial control region sequencing, we investigated fine-scale population structuring of inshore bottlenose dolphins (Tursiops aduncus) inhabiting a range of habitats in and around Moreton Bay, Australia. Bayesian structure analysis identified...

Data from: Russian wheat aphids (Diuraphis noxia) in China: native range expansion or recent introduction?

Bo Zhang, Le Kang, Owain R. Edwards & Susan J. Fuller
In this study, we explore the population genetics of the Russian wheat aphid (RWA) (Diuraphis noxia), one of the world’s most invasive agricultural pests, in north-western China. We have analysed the data of 10 microsatellite loci and mitochondrial sequences from 27 populations sampled over 2 years in China. The results confirm that the RWAs are holocyclic in China with high genetic diversity indicating widespread sexual reproduction. Distinct differences in microsatellite genetic diversity and distribution revealed...

Data from: The maintenance of sperm variability: context-dependent selection on sperm morphology in a broadcast spawning invertebrate

Darren W. Johnson, Keyne Monro & Dustin J. Marshall
Why are sperm so variable despite having a singular, critical function and an intimate relationship with fitness? A key to understanding the evolution of sperm morphology is identifying which traits enable sperm to be successful fertilizers. Several sperm traits (e.g. tail length, overall size) are implicated in sperm performance, but the benefits of these traits are likely to be highly context-dependent. Here, we examined phenotypic selection on sperm morphology of a broadcast spawning tube worm...

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  • University of Queensland
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  • French National Centre for Scientific Research
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  • University of Sydney
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