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… 
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40 Citations
Background Citations
16
Methods Citations
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Results Citations
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40 Citations

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.

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.

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.

The Wilhelmine E. Key 1996 Invitational Lecture. Sexual selection: a driver of genetic change in Hawaiian Drosophila.

Genetic and morphological analysis suggests that each founding event in the Hawaiian archipelago has resulted in a newly organized, highly specific gene pool, not simply a transplanted colony of the source species.

The role of founder effects on the evolution of reproductive isolation

Experimental evolution is used to create one thousand replicates that underwent an extreme bottleneck and to study whether founder effects can lead to an increase in reproductive isolation in Drosophila yakuba, demonstrating that, similar to morphological and life‐history traits, behavioural traits can be affected by inbreeding and genetic drift.

The reality and importance of founder speciation in evolution.

  • A. Templeton
  • Biology
    BioEssays : news and reviews in molecular, cellular and developmental biology
  • 2008
Although rare, founder speciation can have a disproportionate importance in adaptive innovation and radiation, and examples are given to show that "rare" does not mean "unimportant" in evolution.

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