TheDrosophilaseminal proteome and its role in postcopulatory sexual selection

Philosophical Transactions of the Royal Society B Biological Sciences, Journal Year: 2020, Volume and Issue: 375(1813), P. 20200072 - 20200072

Published: Oct. 18, 2020

Postcopulatory sexual selection (PCSS), comprised of sperm competition and cryptic female choice, has emerged as a widespread evolutionary force among polyandrous animals. There is abundant evidence that PCSS can shape the evolution sperm. However, are not whole story: they accompanied by seminal fluid substances play many roles, including influencing PCSS. Foremost models Drosophila melanogaster, which displays ubiquitous polyandry, exhibits intraspecific variation in number proteins (Sfps) appear to modulate paternity share. Here, we first consolidate current information on identities D. melanogaster Sfps. Comparing between human proteomes, find similarities protein classes individual proteins, some Sfp genes linked PCSS, suggesting conservation broad-scale functions. We then review experimental for functions Sfps conflict. identify gaps our knowledge areas future research, an enhanced identification PCSS-related Sfps, their interactions with rival females, role qualitative changes mechanisms ejaculate tailoring. This article part theme issue 'Fifty years competition'.

Language: Английский

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Chemical Cues that Guide Female Reproduction in Drosophila melanogaster

Journal of Chemical Ecology, Journal Year: 2018, Volume and Issue: 44(9), P. 750 - 769

Published: March 19, 2018

Language: Английский

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The evolution of sex peptide: sexual conflict, cooperation, and coevolution

Biological reviews/Biological reviews of the Cambridge Philosophical Society, Journal Year: 2022, Volume and Issue: 97(4), P. 1426 - 1448

Published: March 6, 2022

ABSTRACT A central paradigm in evolutionary biology is that the fundamental divergence fitness interests of sexes (‘sexual conflict’) can lead to both evolution sex‐specific traits reduce for individuals opposite sex, and sexually antagonistic coevolution between sexes. However, clear examples evolved this way – where a single trait one sex demonstrably depresses members resulting are rare. The Drosophila seminal protein ‘sex peptide’ (SP) perhaps most widely cited example appears harm females while benefitting males. Transferred ejaculate by males during mating, SP triggers profound wide‐ranging changes female behaviour physiology. Early studies reported transfer enhances male depressing fitness, providing foundations widespread view has manipulate benefit. Here, we argue ( i ) simplification wider body contradictory empirical research, ii narrow with respect theory describing origin maintenance selected traits, iii hard reconcile what know history SP's effects on females. We begin charting thought regarding SP, at proximate (its production, function, mechanism action) ultimate consequences history) levels, reviewing how were development field sexual conflict. describe prevailing evolution: originated continues evolve In contrast view, three grounds weight evidence does not support receipt decreases fitness: results from impact mixed more often neutral or positive, costs emerging only under nutritional extremes; whether appreciable wild‐living populations remains untested; recently described confounds genetic manipulations raise possibility measures benefits have been distorted. Beyond effects, comparative data also difficult square idea suffer SP. Instead, these functional genetics neural circuitry responses suggest an involving dedicated SP‐sensing apparatus reproductive tract likely because it females, rather than harms them. end exploring functioning as signal quality sperm storage (or both). expanded outline recognises context‐dependent fluctuating roles played cooperative selection traits.

Language: Английский

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Genetic Variation in Male Mate Choice for Large Females in Drosophila melanogaster

Ecology and Evolution, Journal Year: 2025, Volume and Issue: 15(1)

Published: Jan. 1, 2025

ABSTRACT Males in many species show courtship and mating preferences for certain females over others when given the choice. One of most common targets male mate choice insects is female body size, with males preferring to court larger, higher‐fecundity investing more resources matings those females. Although this preference well‐documented at level, less known about how varies within whether there standing genetic variation populations. We used hemiclonal analysis fruit fly, Drosophila melanogaster , test heritable pre‐ postcopulatory components large found additive both forms choice: from different hemiclone lines varied strength their degree which they extended stronger were likely females, was no correlation between choice, suggesting that are under independent control. Genetic may be widespread, potentially impacting fitness sexes adaptive evolution

Language: Английский

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Developmental Environment Effects on Sexual Selection in Male and Female Drosophila melanogaster

PLoS ONE, Journal Year: 2016, Volume and Issue: 11(5), P. e0154468 - e0154468

Published: May 11, 2016

The developmental environment can potentially alter the adult social and influence traits targeted by sexual selection such as body size. In this study, we manipulated larval density in male female Drosophila melanogaster, which results distinct size phenotypes–high (low) densities for small (large) adults–and measured experimental groups consisting of males females from high, low, or a mixture low high densities. Overall, large (those reared at density) had more matings, mates produced offspring than density). number was positively associated with their (i.e. there positive Bateman gradient) where experimentally varied, likely due to covariance between productivity mating rate. For males, found evidence that affected relative importance via mate (Bateman gradients), productivity, paternity share, covariances. Mate were significantly reduced environments mixed sizes, versus all small, suggesting heterogeneity altered on subset males. Males are commonly assumed benefit females, but contrast expectations both did not gain per females. Collectively, our indicate sex-specific effects operation selection, phenotype individuals, competitors mates.

Language: Английский

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Seminal fluid and accessory male investment in sperm competition

Philosophical Transactions of the Royal Society B Biological Sciences, Journal Year: 2020, Volume and Issue: 375(1813), P. 20200068 - 20200068

Published: Oct. 18, 2020

Sperm production and allocation strategies have been a central concern of sperm competition research for the past 50 years. But during ‘sexual cascade’ there may be strong selection alternative routes to maximizing male fitness. Especially with evolution internal fertilization, common by now well-studied example is accessory ejaculate investment represented seminal fluid, complex mixture proteins, peptides other components transferred females together sperm. How fluid should covary probably depends on mechanism action. If boost paternity success directly enhancing function or use, we might often expect positive correlation between two forms investment, whereas trade-offs seem more likely if acts independently This largely borne out broad taxonomic survey establish prevailing patterns animal evolution, in light which I discuss gaps that remain our understanding this key component its relationship before outlining promising approaches examining fluid-mediated competitiveness post-genomic era. article part theme issue ‘Fifty years competition’.

Language: Английский

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Last male sperm precedence is modulated by female remating rate inDrosophila melanogaster

Evolution Letters, Journal Year: 2018, Volume and Issue: 2(3), P. 180 - 189

Published: April 13, 2018

Following multiple matings, sperm from different males compete for fertilization within the female reproductive tract. In many species, this competition results in an unequal sharing of paternity that favors most recent mate, termed last male precedence (LMSP). Much our understanding LMSP comes studies Drosophila melanogaster focus on twice-mated females with standardized latencies between successive matings. Despite accumulating evidence indicating often mate more than two and exhibit variation latency consequences mating rate are poorly understood. Here, we developed a paradigm utilizing D. which remated at various time intervals either or three transgenic produce fluorescent (green, red, blue). This genetic manipulation enables assessment offspring male-specific fate examination tracts. We found remating had no relationship mated males. However, was significantly reduced thrice-mated short intervals; coinciding last-male storage. Thus, influences relative share paternity, overall clutch diversity, ultimately acquisition indirect benefits to potentially maximize success.

Language: Английский

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Sex allocation plasticity on a transcriptome scale: Socially sensitive gene expression in a simultaneous hermaphrodite

Molecular Ecology, Journal Year: 2019, Volume and Issue: 28(9), P. 2321 - 2341

Published: March 20, 2019

Phenotypic plasticity can enable organisms to produce optimal phenotypes in multiple environments. A crucial life history trait that is often highly plastic sex allocation, which simultaneous hermaphrodites describes the relative investment into male versus female functions. Theory predicts-and morphological evidence supports-that greater function favoured with increasing group size, due importance of sperm competition for reproductive success. Here, we performed a genome-wide gene expression assay test such allocation model hermaphrodite, free-living flatworm Macrostomum lignano. Based on RNA-Seq data from 16 biological replicates spanning four different size treatments, demonstrate at least 10% >75,000 investigated transcripts M. lignano are differentially expressed according social environment, rising >30% putative gonad-specific (spermatogenesis and oogenesis candidates) tail-specific (seminal fluid candidates). This transcriptional response closely corresponds expected shift away towards level. Using whole-mount situ hybridization, then confirm many exhibit organ-specific expression, RNA interference selected testis- ovary-specific candidates establishes these indeed gametogenesis pathways. We conclude large proportion sex-specific prevailing ecological conditions functionally relevant key phenotypes. Our study thus begins bridge organismal molecular perspectives plasticity.

Language: Английский

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Sex peptide receptor-regulated polyandry modulates the balance of pre- and post-copulatory sexual selection in Drosophila

Nature Communications, Journal Year: 2019, Volume and Issue: 10(1)

Published: Jan. 11, 2019

Abstract Polyandry prolongs sexual selection on males by forcing ejaculates to compete for fertilisation. Recent theory predicts that increasing polyandry may weaken pre-copulatory and increase the relative importance of post-copulatory selection, but experimental tests this prediction are lacking. Here, we manipulate levels in groups Drosophila melanogaster deletion female sex peptide receptor . We show which sex-peptide-receptor is absent females ( SPR- ) have higher polyandry, – as a result weaker male mating success, compared controls. Post-copulatory paternity share relatively more important groups, where gain additional repeatedly with same females. These results provide evidence elevated weakens males, shifts events, pathway can play key role modulating process

Language: Английский

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Integrative developmental ecology: a review of density-dependent effects on life-history traits and host-microbe interactions in non-social holometabolous insects

Evolutionary Ecology, Journal Year: 2020, Volume and Issue: 34(5), P. 659 - 680

Published: Sept. 2, 2020

Abstract Population density modulates a wide range of eco-evolutionary processes including inter- and intra-specific competition, fitness population dynamics. In holometabolous insects, the larval stage is particularly susceptible to density-dependent effects because larva resource-acquiring stage. Larval can modulate expression life-history traits not only in adult stages but also downstream for dynamics evolution. Better understanding scope generality on current future generations provide useful knowledge both theory experiments developmental ecology. Here, we review literature non-social insects. First, functional definition navigate terminology literature. We then classify biological levels upon which be observed followed by produced over past decades across major groups. Next, argue that host-microbe interactions are yet an overlooked level propose conceptual model explain how curves. summary, this provides integrative framework used guide research field ecology

Language: Английский

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