6533b858fe1ef96bd12b5bc4
RESEARCH PRODUCT
The effect of periodic bottlenecks on the competitive ability of Drosophila pseudoobscura lines.
Andrés MoyaFernando González-candelasLópez Bueno Jasubject
biologymedia_common.quotation_subjectPopulation DynamicsGenetic Variationfood and beveragesPopulation geneticssocial sciencesInterspecific competitionbiology.organism_classificationCompetition (biology)BottleneckDrosophila pseudoobscuraEvolutionary biologyGenetic variationGeneticsAnimalsRegression AnalysisDrosophilanatural sciencesDrosophila willistoniGenetic variabilitySelection GeneticGenetics (clinical)media_commondescription
Competition experiments between several Drosophila pseudoobscura strains that were previously subjected to periodic bottlenecks of different sizes and D. willistoni have been carried out. Contrary to previous results with these two species, where stable coexistence was detected, populations of D. pseudoobscura displaced D. willistoni in a few generations. By using a relative fitness measure, the control lines (that had not gone through bottlenecks) outcompeted D. willistoni faster than bottlenecked lines. One of these, corresponding to the minimum possible bottleneck size of one pair, also shows significantly lower relative fitness than the other strains. These results are discussed in relation to the effect of periodic bottlenecks in reducing genetic variability and its incidence on the competitive ability of these lines.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1993-01-01 |