The Influence of Sexual and Larval Selection on the Maintenance of Polymorphism at the Sepia Locus in DROSOPHILA MELANOGASTER
AUTOR(ES)
Anxolabehere, D.
RESUMO
Sexual selection is measured between two strains of Drosophila melanogaster: a wild strain and a strain mutant at the sepia locus. Frequency-dependent male mating was found to be successful, whereas the female genotype exerted no influence. The rarer the male genotype becomes, the greater is its mating success. A selection model is built for this behavior characteristic in which selection operates differently in the two sexes. The genetic consequencies of this model upon the maintenance of genetic polymorphism at the sepia locus are compared to experimental data from previous population cage studies. The fit obtained with this sexual selection model is compared to that of the larvel selection model previously investigated. A model composed of both sexual and larval components of fitness is presented. The role that each major selection component is expected to play in experimental populations as the gene frequency changes is discussed. Sexual selection leads to an equilibrium level higher than larval selection, and the combined model is very close to the experimental values.
ACESSO AO ARTIGO
http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=1214258Documentos Relacionados
- Polymorphism at the REF(2)P Locus in DROSOPHILA MELANOGASTER: Preliminary Experiments concerning the Selection Mechanisms Involved in Its Maintenance
- Excess Polymorphism at the Adh Locus in DROSOPHILA MELANOGASTER
- Targeted Selection Experiments and Enzyme Polymorphism: Negative Evidence for Octanoate Selection at the G6PD Locus in DROSOPHILA MELANOGASTER
- Polymorphism and Locus-Specific Effects on Polymorphism at Microsatellite Loci in Natural Drosophila Melanogaster Populations
- Polymorphism at the Ebony Locus of DROSOPHILA MELANOGASTER and Population Fitness
