Sperm Transfer, Storage, Displacement, and Utilization in Drosophila Melanogaster

Lefevre, George; Jonsson, Ulla-Britt

doi:10.1093/genetics/47.12.1719

Cited by 356 publications

(67 citation statements)

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“…Males reportedly transfer fewer sperm in successive copulations, until exhaustion after four to five matings [26]. We observed on average 3.89 mating per female (s.e.m.…”

Section: Resultsmentioning

confidence: 65%

“…Because of male sperm competition, remating could have little benefit on females [22][23][24]. Yet, females mating with many males in a single reproductive episode and polyandry have been regularly reported in D. melanogaster [15,[25][26][27][28], so the adaptive significance of this behaviour remains unclear. In other species, multiple matings and/or polyandry are reported to have a positive effect on female fitness, including an increase in the number of offspring produced [17] and offspring genetic diversity [18].…”

Section: Introductionmentioning

confidence: 99%

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Drosophila melanogaster females change mating behaviour and offspring production based on social context

et al. 2012

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In Drosophila melanogaster, biological rhythms, aggression and mating are modulated by group size and composition. However, the fitness significance of this group effect is unknown. By varying the composition of groups of males and females, we show that social context affects reproductive behaviour and offspring genetic diversity. Firstly, females mating with males from the same strain in the presence of males from a different strain are infecund, analogous to the Bruce effect in rodents, suggesting a social context-dependent inbreeding avoidance mechanism. Secondly, females mate more frequently in groups composed of males from more than one strain; this mitigates last male sperm precedence and increases offspring genetic diversity. However, smell-impaired Orco mutant females do not increase mating frequency according to group composition; this indicates that social context-dependent changes in reproductive behaviour depend on female olfaction, rather than direct male-male interactions. Further, variation in mating frequency in wild-type strains depends on females and not males. The data show that group composition can affect variance in the reproductive success of its members, and that females play a central role in this process. Social environment can thus influence the evolutionary process.

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“…Males reportedly transfer fewer sperm in successive copulations, until exhaustion after four to five matings [26]. We observed on average 3.89 mating per female (s.e.m.…”

Section: Resultsmentioning

confidence: 65%

Section: Introductionmentioning

confidence: 99%

Drosophila melanogaster females change mating behaviour and offspring production based on social context

et al. 2012

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“…(a) Acquisition of sperm motility For species generating motile sperm, once spermatocytes have segregated their genomes to become haploid, and undergone cellular rearrangements and morphological modifications to transform into spermatozoa, they only lack motility in order to perform their ultimate task of fertilization. In many organisms, including Drosophila, motility is acquired during the latter stages of spermatogenesis, and mature sperm is the direct end product, requiring no further activation (Lefevre & Jonsson 1962;Tokuyasu 1974). In a wide range of other species, however, spermatids have to undergo a maturation process called capacitation in mammals, or spermiogenesis in C. elegans.…”

Section: Aflagellate and Amoeboid Spermmentioning

confidence: 99%

Evolution and spermatogenesis

White-Cooper

Bausek

2010

Phil. Trans. R. Soc. B

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Sexual reproduction depends on the production of haploid gametes, and their fusion to form diploid zygotes. Here, we discuss sperm production and function in a molecular and functional evolutionary context, drawing predominantly from studies in model organisms (mice, Drosophila, Caenorhabditis elegans). We consider the mechanisms involved in establishing and maintaining a germline stem cell population in testes, as well as the factors that regulate their contribution to the pool of differentiating cells. These processes involve considerable interaction between the germline and the soma, and we focus on regulatory signalling events in a variety of organisms. The male germline has a unique transcriptional profile, including expression of many testis-specific genes. The evolutionary pressures associated with gene duplication and acquisition of testis function are discussed in the context of genome organization and transcriptional regulation. Post-meiotic differentiation of spermatids involves very dramatic changes in cell shape and acquisition of highly specialized features. We discuss the variety of sperm motility mechanisms and how various reproductive strategies are associated with the diversity of sperm forms found in animals.

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“…The presence of sperm from more than one male often results in differential fertilization of female eggs. Sperm use patterns in multiply mated females have been extensively studied in D. melanogaster , where the last mating male sires the majority of progeny ( Lefevre and Jonsson, 1962 ; Clark et al, 1995 ). However, last male precedence is influenced by genetic and environmental factors ( Singh et al, 2002 ; Schnakenberg et al, 2012 ).…”

Section: Introductionmentioning

confidence: 99%

Male Age Influences Re-mating Incidence and Sperm Use in Females of the Dengue Vector Aedes aegypti

2021

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Diseases transmitted by female Aedes aegypti mosquitoes are public health issues in countries in the tropics and sub-tropics. As in other insects, A. aegypti females undergo behavioral and physiological changes upon mating that principally act to facilitate the production of progeny. The primary effectors of A. aegypti female post-mating responses are male-derived seminal proteins that are transferred to females during mating. Increased male age reduces ejaculate function in numerous taxa and alters seminal protein composition in Drosophila melanogaster, but the impacts of male age on female A. aegypti post-mating responses are unknown. Here, we used “old” (21–22 days old) and “young” (4–5 days old) A. aegypti males to assess the influence of male age on oviposition, fertility, and re-mating incidence in their mates. We also examined how age influenced paternity share in females initially mated to young or old males that subsequently re-mated with a transgenic male that transferred RFP-labeled sperm and whose progeny inherited a larval-expressed GFP marker. We found that increased male age had no effect on female fecundity or fertility but significantly impacted their ability to prevent re-mating in their mates—more than half (54.5%) of the females mated to an old male re-mated, compared to 24% of females initially mated to a young male. Polyandrous A. aegypti females displayed first male precedence regardless of the age of their initial mate. However, young males were better able to compete with rival male sperm, siring significantly more progeny (77%) compared to old males (64%). Young males had significantly more sperm in their seminal vesicles than old males at the time of mating, although males of both age groups transferred similar numbers of sperm to their mates. Our results suggest that male senescence differentially impacts the induction of some post-mating changes in A. aegypti females. As the effect of age may be further exacerbated in the field, age-related declines in male ability to induce sexual refractoriness have implications for A. aegypti population control programs that release adults into the environment.

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Sperm Transfer, Storage, Displacement, and Utilization in Drosophila Melanogaster

Cited by 356 publications

References 0 publications

Drosophila melanogaster females change mating behaviour and offspring production based on social context

Drosophila melanogaster females change mating behaviour and offspring production based on social context

Evolution and spermatogenesis

Male Age Influences Re-mating Incidence and Sperm Use in Females of the Dengue Vector Aedes aegypti

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