FOUNDER‐FLUSH SPECIATION IN DROSOPHILA PSEUDOOBSCURA: A LARGE‐SCALE EXPERIMENT

@article{Galiana1993FOUNDERFLUSHSI,
  title={FOUNDER‐FLUSH SPECIATION IN DROSOPHILA PSEUDOOBSCURA: A LARGE‐SCALE EXPERIMENT},
  author={Agust{\'i} Galiana and Andr{\'e}s Moya and Francisco J. Ayala},
  journal={Evolution},
  year={1993},
  volume={47}
}
A founder‐flush‐crash model of speciation has been proposed that may particularly apply to island and other colonizations. Previous laboratory experiments testing the model have given inconsistent results. We have conducted a large experiment with Drosophila pseudoobscura designed to meet the essential postulates of the model and to separately test some of the postulates. Forty‐five experimental and 12 control populations have been studied during seven successive founder‐flush‐crash cycles, or… 

SINGLE FOUNDER‐FLUSH EVENTS AND THE EVOLUTION OF REPRODUCTIVE ISOLATION

Results indicate that none of 50 independent founder‐flush lines evolved significant assortative mating relative to the control population, which suggests a diminished emphasis on population bottlenecks in speciation of D. melanogaster and perhaps in general.

POSTMATING ISOLATION ANALYSIS IN FOUNDER‐FLUSH EXPERIMENTAL POPULATIONS OF DROSOPHILA PSEUDOOBSCURA

A detailed analysis intended to detect postmating barriers in experimental populations of Drosophila pseudoobscura obtained through nine founderflush cycles found that the evolution of premating barriers, as shown by two of these populations, is not necessarily accompanied by the Evolution of postmates ones.

A direct experimental test of founder‐flush effects on the evolutionary potential for assortative mating

Multivariate analyses on the courtship repertoires found that, although both bottlenecked and nonbottlenecked treatments attained similar levels of assortative mating, the treatments exhibited different evolutionary solutions in their correlated responses, suggesting that the bottlenecked lines had greater potential for the evolution of novel phenotypes as predicted by founder‐induced speciation models.

Origin of sexual isolation in Drosophila ananassae due to founder effects

Findings provide evidence for origin of sexual isolation by founder effects in D. ananassae by using Bonferroni test for pair-wise analysis and significant differences between homogamic and heterogamic matings were found in 25 crosses.

Laboratory environments are not conducive for allopatric speciation

It is suggested that allopatric speciation experiments are more likely to yield conclusive results under divergent selection than under drift, and points to the benefits of large populations and many generations.

DIVERGENT ENVIRONMENTS AND POPULATION BOTTLENECKS FAIL TO GENERATE PREMATING ISOLATION IN DROSOPHILA PSEUDOOBSCURA

  • H. Rundle
  • Biology
    Evolution; international journal of organic evolution
  • 2003
The novel environment did not cause the evolution of any premating isolation and it reduced the likelihood of speciation through its effects on male mating success, both as a plastic response to this environment and as a result of environment-dependent inbreeding effects in the bottlenecked populations.

PRESUMPTIVE RAPID SPECIATION AFTER A FOUNDER EVENT IN A LABORATORY POPULATION OF NEREIS: ALLOZYME ELECTROPHORETIC EVIDENCE DOES NOT SUPPORT THE HYPOTHESIS

The Lab population was already a species different from PI and P2 at the time when it was originally sampled in 1964, and is genetically depauperate, most likely as a consequence of the founder event, but this reduced variability contributes only trivially to the genetic differentiation between the populations.

Convergent evolution of the mating behaviour of founder‐flush populations of the housefly

This study demonstrates how convergent evolution can dissolve founder‐flush effects and shows significant evolutionary potential in courtship, along with homogamic and heterogamic preferences.

Assortative Mating and Fertility in two Drosophila subobscura Strains with different Mitochondrial DNA Haplotypes

The mating pattern and female fertility on the two main mitochondrial DNA haplotypes (I and II) of Drosophila subobscura were studied, in an attempt to find possible differences between them in

Effects of Post-Glacial Range Expansions and Population Bottlenecks on Species Richness

Raw data from mating tests showed that the poor isolation between mother and daughter populations was an effect of asymmetric mate preferences towards males from the mother population, suggesting that peripatric speciation can be effective in generating reproductive isolation between sister populations.

References

SHOWING 1-10 OF 41 REFERENCES

SEXUAL ISOLATION, SPECIATION AND THE DIRECTION OF EVOLUTION

  • K. Kaneshiro
  • Biology
    Evolution; international journal of organic evolution
  • 1980
This paper elaborates the hypothesis proposed by Kaneshiro (1976) and proposes a uni-directional phylogeny for the six populations of the grimshawi complex of species.

THE FOUNDER‐FLUSH SPECIATION THEORY: AN EXPERIMENTAL APPROACH

  • J. Powell
  • Biology
    Evolution; international journal of organic evolution
  • 1978
Stemming from Mayr's (1942; 1954) concept of the "founder principle", Carson (1968; 1971; 1973; 1975) hasdeveloped a somewhat unorthodox theory of speciation. Briefly, Carson views the steps in

Genetic Revolutions, Founder Effects, and Speciation

It is argued that, although founder effects may cause speciation under sufficiently stringent conditions, they are only one extreme of a continuous range of possibilities, and divergence may be driven in a variety of ways, without the need for drastic external changes.

FOUNDER‐FLUSH SPECIATION: AN UPDATE OF EXPERIMENTAL RESULTS WITH DROSOPHILA

  • D. DoddJ. Powell
  • Biology
    Evolution; international journal of organic evolution
  • 1985
The Chitty hypothesis ofpopulation regulation, population dynamics in a blacktailed prairiedog town in the Black Hills ofSouth Dakota, and population cycles in small mammals under natural conditions are reviewed.

The theory of speciation via the founder principle.

The genetic transilience model is used to explain several features of the evolution of the Hawaiian Drosophila, and experimental designs are outlined to test the major predictions of the theory.

A computer model of speciation by founder effects

A computer model of a two-locus genetic system with epistatic selection was used to investigate factors influencing the probability of the origin of reproductive isolation, and it was concluded that it is unlikely to be a major cause of rapid speciation, although it could be a contributory factor.

The Effect of Successive Founder Events on Mating Propensity of Drosophila

Variation in the mating rates of different female genotypes would seem to play as important a role in intersexual selection as sexual responsiveness to particular male traits (e.g., sexual preferences).

A Mechanism for Rapid Allopatric Speciation

  • C. Wills
  • Biology
    The American Naturalist
  • 1977
The nature of the isolating mechanisms between Drosophila pseucdoobscura and Dosophila persimilis and of sexual preferences in Drosophile prosaltans are studied and the evolutionary implications of sexual behavior are considered.

MODES OF SPECIATION AND INFERENCES BASED ON GENETIC DISTANCES

  • A. Templeton
  • Biology
    Evolution; international journal of organic evolution
  • 1980
Investigating the validity of Mayr's founder effect-"genetic revolution" model from a population genetic perspective indicates that a founder effect can indeed induce rapid speciation, complete with preand/or post-mating isolating barriers, but the details and implications are far different from those portrayed by Mayr (1954).

MATING PROPENSITY AND COURTSHIP BEHAVIOR IN SERIALLY BOTTLENECKED LINES OF THE HOUSEFLY

This study documents nondebilitating differentiation in the courtship repertoire that can account for divergent mating propensities and premating isolation in houseflies.