Social effects for locomotion vary between environments in<i>Drosophila melanogaster</i>females

Signor, Sarah; Abbasi, Mohammad; Marjoram, Paul; Nuzhdin, Sergey V.

doi:10.1111/evo.13266

Cited by 27 publications

(41 citation statements)

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“…Even when strains or lines are not readily available, as often occurs in behavioral ecology studies, other means for partitioning genetic variation in interacting partners can be used, for example by taking advantage of naturally-occurring alternative phenotypes with a genetic basis (e.g., Bailey and Zuk 2012). An equation adapted from 2 recent studies (MarieOrleach 2017; Signor et al 2017), derived originally from Moore et al (1997), is illustrative:…”

Section: Box 1 the Interaction Coefficient ψ: A Standardized Estimamentioning

confidence: 99%

“…For every trait j in the interacting partner, the magnitude and direction of IGEs on trait i in the focal individual can be estimated by ψ ij . Studies of behavior can often take advantage of distinct genetic strains or inbred lines, and one way to measure line-specific values of ψ is to run separate models for each line (e.g., Signor et al 2017). In the example above, however, estimates of ψ ij are modeled simultaneously for different focal lines by examining the interaction between a main effect of focal line, l, and z j ' for each interacting trait.…”

Section: Box 1 the Interaction Coefficient ψ: A Standardized Estimamentioning

confidence: 99%

“…At one extreme, population-level differences in ψ for a component of female mate choice in the field cricket Teleogryllus oceanicus rests on the assumption of population genetic structure, and therefore provides inference about differences in IGEs at the population level (Bailey and Zuk 2012). In contrast, several studies provide strain-specific estimates of ψ , for example for predator avoidance behaviors in the guppy Poecilia reticulata (Bleakley et al 2009), sexually antagonistic mating behaviors in the hermaphroditic flatworm Macrostomum lignano (Marie-Orleach et al 2017), and locomotion in the fruit fly Drosophila melanogaster (Signor et al 2017). The latter 3 studies used a small number of inbred lines and report that ψ not only varies for different behavioral traits, but also that different lines show different values of ψ.…”

Section: ¼mentioning

confidence: 99%

“…Researchers have also quantified IGEs on traits that mediate sexual conflict (e.g., Signor et al 2017). In the hermaphroditic flatworm Macrostomum lignano, there is striking heterogeneity in the presence, strength and direction of IGEs on multiple morphological and behavioral traits with expected roles in sexual conflict, such as gonad size and copulation latencies (Marie-Orleach et al 2017).…”

Section: Empirical Evidence For Iges In Behavioral Ecology Researchmentioning

confidence: 99%

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Indirect genetic effects in behavioral ecology: does behavior play a special role in evolution?

2017

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Behavior is rapidly flexible and highly context-dependent, which poses obvious challenges to researchers attempting to dissect its causes. However, over a century of unresolved debate has also focused on whether the very flexibility and context-dependence of behavior lends it a unique role in the evolutionary origins and patterns of diversity in the Animal Kingdom. Here, we propose that both challenges can benefit from studying how indirect genetic effects (IGEs: the effects of genes expressed in one individual on traits in another individual) shape behavioral phenotypes. We provide a sketch of the theoretical framework that grounds IGEs in behavioral ecology research and focus on recent advances made from studies of IGEs in areas of behavioral ecology such as sexual selection, sexual conflict, social dominance, and parent-offspring interactions. There is mounting evidence that IGEs have important influences on behavioral phenotypes associated with these processes, such as sexual signals and preferences and behaviors which function to manipulate interacting partners. IGEs can also influence both responses to selection and selection itself, and considering IGEs refines evolutionary predictions and provides new perspectives on the origins of seemingly perplexing behavioral traits. A key unresolved question, but one that has dominated the behavioral sciences for over a century, is whether behavior is more likely than other types of traits to contribute to evolutionary change and diversification. We advocate taking advantage of an IGE approach to outline falsifiable hypotheses and a general methodology to rigorously test this frequently proposed, yet still contentious, special role of behavior in evolution.

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Section: Box 1 the Interaction Coefficient ψ: A Standardized Estimamentioning

confidence: 99%

Section: Box 1 the Interaction Coefficient ψ: A Standardized Estimamentioning

confidence: 99%

Section: ¼mentioning

confidence: 99%

Section: Empirical Evidence For Iges In Behavioral Ecology Researchmentioning

confidence: 99%

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Indirect genetic effects in behavioral ecology: does behavior play a special role in evolution?

2017

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“…; Signor et al. ) nevertheless imply that the selective environment causes variation in IGEs among populations.…”

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Increased developmental density decreases the magnitude of indirect genetic effects expressed during agonistic interactions in an insect

et al. 2018

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The expression of aggression depends not only on the direct genetic effects (DGEs) of an individual's genes on its own behavior, but also on indirect genetic effects (IGEs) caused by heritable phenotypes expressed by social partners. IGEs can affect the amount of heritable variance on which selection can act. Despite the important roles of IGEs in the evolutionary process, it remains largely unknown whether the strength of IGEs varies across life stages or competitive regimes. Based on manipulations of nymphal densities and> 3000 pair-wise aggression tests across multiple life stages, we experimentally demonstrate that IGEs on aggression are stronger in field crickets (Gryllus bimaculatus) that develop at lower densities than in those that develop at higher densities, and that these effects persist with age. The existence of density-dependent IGEs implies that social interactions strongly determine the plastic expression of aggression when competition for resources is relaxed. A more competitive (higher density) rearing environment may fail to provide crickets with sufficient resources to develop social cognition required for strong IGEs. The contribution of IGEs to evolutionary responses was greater at lower densities. Our study thereby demonstrates the importance of considering IGEs in density-dependent ecological and evolutionary processes.

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Conservation of social effects (Ψ) between two species of Drosophila despite reversal of sexual dimorphism

Signor

Abbasi

Marjoram

et al. 2017

Ecology and Evolution

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Indirect genetic effects (IGEs) describe the effect of the genes of social partners on the phenotype of a focal individual. Here, we measure indirect genetic effects using the “coefficient of interaction” (Ψ) to test whether Ψ evolved between Drosophila melanogaster and D. simulans. We compare Ψ for locomotion between ethanol and nonethanol environments in both species, but only D. melanogaster utilizes ethanol ecologically. We find that while sexual dimorphism for locomotion has been reversed in D. simulans, there has been no evolution of social effects between these two species. What did evolve was the interaction between genotype‐specific Ψ and the environment, as D. melanogaster varies unpredictably between environments and D. simulans does not. In this system, this suggests evolutionary lability of sexual dimorphism but a conservation of social effects, which brings forth interesting questions about the role of the social environment in sexual selection.

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Social effects for locomotion vary between environments inDrosophila melanogasterfemales

Cited by 27 publications

References 84 publications

Indirect genetic effects in behavioral ecology: does behavior play a special role in evolution?

Indirect genetic effects in behavioral ecology: does behavior play a special role in evolution?

Increased developmental density decreases the magnitude of indirect genetic effects expressed during agonistic interactions in an insect

Conservation of social effects (Ψ) between two species of Drosophila despite reversal of sexual dimorphism

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