RAPID DIVERSIFICATION OF SPERM PRECEDENCE TRAITS AND PROCESSES AMONG THREE SIBLING DROSOPHILA SPECIES

@article{Manier2013RAPIDDO,
  title={RAPID DIVERSIFICATION OF SPERM PRECEDENCE TRAITS AND PROCESSES AMONG THREE SIBLING DROSOPHILA SPECIES},
  author={Mollie K. Manier and John M. Belote and Kirstin S. Berben and Stefan L{\"u}pold and Outi Ala-Honkola and William F. Collins and Scott Pitnick},
  journal={Evolution},
  year={2013},
  volume={67}
}
Postcopulatory sexual selection is credited with driving rapid evolutionary diversification of reproductive traits and the formation of reproductive isolating barriers between species. This judgment, however, has largely been inferred rather than demonstrated due to general lack of knowledge about processes and traits underlying variation in competitive fertilization success. Here, we resolved processes determining sperm fate in twice‐mated females, using transgenic Drosophila simulans and… 

Generates Speciation Phenotypes in Drosophila

The results confirm that reproductive isolation can quickly arise from diversifying (allopatric) postcopulatory sexual selection, and illustrates how knowledge of sperm precedence mechanisms can be used to predict the mechanisms and extent of reproductive isolation between populations and species.

Intraspecific sperm competition genes enforce post-mating species barriers in Drosophila

Evidence of a direct mechanistic link between intraspecies sexual selection and reproductive isolation is provided, and two loci important for sperm competitive interactions have an additional role in similar interactions that enforce post-mating reproductive isolation between species.

Postcopulatory sexual selection is associated with accelerated evolution of sperm morphology

This work finds that relative testes mass was significantly and positively associated with more rapid phenotypic divergence in sperm midpiece and flagellum lengths, as well as total sperm length, and suggests that postcopulatory sexual selection promotes rapid evolutionary diversification of sperm morphology.

Female mediation of competitive fertilization success in Drosophila melanogaster

The results demonstrate that females do not simply provide a static arena for sperm competition but rather play an active and pivotal role in postcopulatory processes, and resolve the adaptive significance of genetic variation in female-mediated mechanisms of sperm handling.

Multiple mechanisms of cryptic female choice act on intraspecific male variation in Drosophila simulans

If and how female D. simulans employ these two mechanisms of CFC in response to intraspecific male size variation is explored, suggesting that females use different CFC mechanisms to select for different male traits.

Costs and benefits of giant sperm and sperm storage organs in Drosophila melanogaster

Both sexes have increased longevity in long sperm and long SR genotypes, with fewer reproduction-related benefits and evidence for trade-offs in males, compared to females.

Conspecific sperm precedence is reinforced, but postcopulatory sexual selection weakened, in sympatric populations of Drosophila

The findings demonstrate that direct selection to increase reproductive isolation against other species can compromise the efficacy of sexual selection within species, a collateral effect of reproductive traits responding to heterospecific interactions.

Dissecting post‐mating prezygotic speciation phenotypes

  • K. ShawJohn M. Lambert
  • Biology
    BioEssays : news and reviews in molecular, cellular and developmental biology
  • 2014
The discovery of mechanisms underlying CSP predicts an exciting future for studies of PMPZ speciation phenotypes and possible general principles underlying the origin of species.
...

References

SHOWING 1-10 OF 128 REFERENCES

Conspecific sperm precedence in Drosophila

Evidence for cryptic reproductive divergence among three sibling species of Drosophila that leads to a form of postmating isolation is provided, indicating that females mediate sperm competition, and that second-male sperm precedence is not an automatic consequence of the mechanics of sperm storage.

Female mediation of competitive fertilization success in Drosophila melanogaster

The results demonstrate that females do not simply provide a static arena for sperm competition but rather play an active and pivotal role in postcopulatory processes, and resolve the adaptive significance of genetic variation in female-mediated mechanisms of sperm handling.

Resolving Mechanisms of Competitive Fertilization Success in Drosophila melanogaster

Sperm showed more mobility within the female storage organs than expected, with those from the most recent copulation displacing sperm from previous males; however, sperm viability remained consistent over long-term storage and each male's sperm was equally competitive in fertilizing the female's eggs.

MECHANISMS OF CONSPECIFIC SPERM PRECEDENCE IN DROSOPHILA

Sperm displacement and incapacitation involve the same basic mechanisms seen in second-male sperm precedence within species, supporting the hypothesis that CSP is an evolutionary by-product of adaptations affecting sperm competition within species.

MECHANISMS OF CONSPECIFIC SPERM PRECEDENCE IN DROSOPHILA

It is identified two independent barriers to heterospecific fertilization, sperm displacement and incapacitation, whose action depends on the order of mating, which results in a dearth of hybrid progeny.

Resolving variation in the reproductive tradeoff between sperm size and number

Comparing passerine birds and Drosophila fruit flies with different sperm competition mechanisms provides convincing evidence for the existence of a sperm size–number tradeoff and shows that by considering both sperm competition mechanism and dilution, can the authors account for variation in sperm size between different taxa.

Variation in sperm displacement and its association with accessory gland protein loci in Drosophila melanogaster.

A screen for variation in sperm displacement among 152 lines of Drosophilia melanogaster that were made homozygous for second and/or third chromosomes recovered from natural populations found no correlation between the able to displace resident sperm and the ability to resist being displaced by subsequent sperm.

Ejaculate-female coevolution in Drosophila mojavensis

Test two critical predictions of the hypothesis that coevolving internal characters that mediate successful reproduction may play an important part in speciation are tested by examining geographical variation in Drosophila mojavensis, a species in the early stages of speciation.

Mechanisms underlying the sperm quality advantage in sperm competition and cryptic female choice in Drosophila melanogaster

It is empirically demonstrated for Drosophila melanogaster that both sperm quality and sperm quantity independently contribute to competitive male fertilization success, and exemplify that primary sex cells can bear secondary sexual straits.
...