What Use Is an Infertile Sperm? A Comparative Study of Sperm-Heteromorphic Drosophila

Holman, Luke; Freckleton, Robert P.; Snook, Rhonda R.

doi:10.1111/j.1558-5646.2007.00280.x

Cited by 48 publications

(52 citation statements)

References 70 publications

(128 reference statements)

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“…Clinal patterns of variation are often ascribed to selection, including latitudinal clines for increasing body size as latitude increases observed in this species27. Females of this species are monogamous4647, although females will need to mate again if the first mate does not transfer a functional ejaculate48. There is no evidence of diapause6869.…”

Section: Methodsmentioning

confidence: 90%

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Gene expression clines reveal local adaptation and associated trade-offs at a continental scale

Porcelli

Westram

Pascual

et al. 2016

Sci Rep

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Local adaptation, where fitness in one environment comes at a cost in another, should lead to spatial variation in trade-offs between life history traits and may be critical for population persistence. Recent studies have sought genomic signals of local adaptation, but often have been limited to laboratory populations representing two environmentally different locations of a species’ distribution. We measured gene expression, as a proxy for fitness, in males of Drosophila subobscura, occupying a 20° latitudinal and 11 °C thermal range. Uniquely, we sampled six populations and studied both common garden and semi-natural responses to identify signals of local adaptation. We found contrasting patterns of investment: transcripts with expression positively correlated to latitude were enriched for metabolic processes, expressed across all tissues whereas negatively correlated transcripts were enriched for reproductive processes, expressed primarily in testes. When using only the end populations, to compare our results to previous studies, we found that locally adaptive patterns were obscured. While phenotypic trade-offs between metabolic and reproductive functions across widespread species are well-known, our results identify underlying genetic and tissue responses at a continental scale that may be responsible for this. This may contribute to understanding population persistence under environmental change.

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Section: Methodsmentioning

confidence: 90%

“…Females of this species are resolutely monogamous4647, unless males fail to transfer sperm48, so selection arising from postcopulatory sexual selection (sperm competition and cryptic female choice) does not occur. Males need to secure mates and, when doing so, ensure sperm and ejaculate protein transfer.…”

Section: Resultsmentioning

confidence: 99%

Gene expression clines reveal local adaptation and associated trade-offs at a continental scale

Porcelli

Westram

Pascual

et al. 2016

Sci Rep

Self Cite

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“…Drosophila subobscura females mature at 8 days post eclosion, with males maturing at 2 -3 days [26]. Drosophila pseudoobscura females mature at 3 days post eclosion, and males at 1 -2 days [26]. Both species have a highly male-biased operational sex ratio, owing to monandry in D. subobscura [16], and a 3 -5 day female remating latency in D. pseudoobscura [22].…”

Section: Materials and Methods (A) Species Examined And Mating Proceduresmentioning

confidence: 99%

“…However D. subobscura is less tolerant to high temperatures than D. pseudoobscura, so we used 188C for the D. subobscura longevity trials. Drosophila subobscura females mature at 8 days post eclosion, with males maturing at 2 -3 days [26]. Drosophila pseudoobscura females mature at 3 days post eclosion, and males at 1 -2 days [26].…”

Section: Materials and Methods (A) Species Examined And Mating Proceduresmentioning

confidence: 99%

Extreme cost of rivalry in a monandrous species: male–male interactions result in failure to acquire mates and reduced longevity

et al. 2014

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Mating system variation is profound in animals. In insects, female willingness to remate varies from mating with hundreds of males (extreme polyandry) to never remating (monandry). This variation in female behaviour is predicted to affect the pattern of selection on males, with intense pre-copulatory sexual selection under monandry compared to a mix of pre-and post-copulatory forces affecting fitness under polyandry. We tested the hypothesis that differences in female mating biology would be reflected in different costs of pre-copulatory competition between males. We observed that exposure to rival males early in life was highly costly for males of a monandrous species, but had lower costs in the polyandrous species. Males from the monandrous species housed with competitors showed reduced ability to obtain a mate and decreased longevity. These effects were specific to exposure to rivals compared with other types of social interactions (heterospecific male and mated female) and were either absent or weaker in males of the polyandrous species. We conclude that males in monandrous species suffer severe physiological costs from interactions with rivals and note the significance of male-male interactions as a source of stress in laboratory culture.

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“…Multiple mating and sperm storage thus create the potential for at least two types of selective regime: sperm competition, whereby sperm from different males present in the same female at the same time compete for ova (e.g., Birkhead and Møller 1998;Parker 1998;Simmons 2001), and cryptic female choice, whereby a female preferentially uses sperm from one male over those from another (Eberhard 1996). Consequently, sperm com-petition and cryptic female choice are thought to underlie such diverse phenomena as sperm gigantism (e.g., Miller and Pitnick 2002), sperm heteromorphism (e.g., Holman and Snook 2006;Holman et al 2008), and the rapid evolution of some reproductive proteins (reviewed in Clark et al 2006;Panhuis et al 2006).…”

mentioning

confidence: 99%

A Role for Acp29AB, a Predicted Seminal Fluid Lectin, in Female Sperm Storage inDrosophila melanogaster

et al. 2008

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Females of many animal species store sperm for taxon-specific periods of time, ranging from a few hours to years. Female sperm storage has important reproductive and evolutionary consequences, yet relatively little is known of its molecular basis. Here, we report the isolation of a loss-of-function mutation of the Drosophila melanogaster Acp29AB gene, which encodes a seminal fluid protein that is transferred from males to females during mating. Using this mutant, we show that Acp29AB is required for the normal maintenance of sperm in storage. Consistent with this role, Acp29AB localizes to female sperm storage organs following mating, although it does not appear to associate tightly with sperm. Acp29AB is a predicted lectin, suggesting that sugar-protein interactions may be important for D. melanogaster sperm storage, much as they are in many mammals. Previous association studies have found an effect of Acp29AB genotype on a male's sperm competitive ability; our findings suggest that effects on sperm storage may underlie these differences in sperm competition. Moreover, Acp29AB's effects on sperm storage and sperm competition may explain previously documented evidence for positive selection on the Acp29AB locus.

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What Use Is an Infertile Sperm? A Comparative Study of Sperm-Heteromorphic Drosophila

Cited by 48 publications

References 70 publications

Gene expression clines reveal local adaptation and associated trade-offs at a continental scale

Gene expression clines reveal local adaptation and associated trade-offs at a continental scale

Extreme cost of rivalry in a monandrous species: male–male interactions result in failure to acquire mates and reduced longevity

A Role for Acp29AB, a Predicted Seminal Fluid Lectin, in Female Sperm Storage inDrosophila melanogaster

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