THE EFFECTS OF INTERSPECIFIC COMPETITION ON THE DYNAMICS OF A POLYMORPHISM IN AN EXPERIMENTAL POPULATION OF DROSOPHILA MELANOGASTER | Zendy

Andrew G. Clark | Zendy

Open Access

THE EFFECTS OF INTERSPECIFIC COMPETITION ON THE DYNAMICS OF A POLYMORPHISM IN AN EXPERIMENTAL POPULATION OF DROSOPHILA MELANOGASTER

Author(s) -

Andrew G. Clark

Publication year - 1979

Publication title -

genetics

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.792

H-Index - 246

eISSN - 1943-2631

pISSN - 0016-6731

DOI - 10.1093/genetics/92.4.1315

Subject(s) - biology , interspecific competition , drosophila melanogaster , storage effect , evolutionary biology , genetics , allele , frequency dependent selection , intraspecific competition , drosophila (subgenus) , population , selection (genetic algorithm) , melanogaster , population genetics , competition (biology) , ecology , gene , demography , artificial intelligence , sociology , computer science

Populations of Drosophila melanogaster with a fourth-chromosome polymorphism were subjected to different levels of competition with Drosophila simulans. The dynamics of the polymorphism and the equilibrium frequencies of the sparkling allele were seen to depend on the competitive level, while the higher productivity of the competing populations was shown to be due to the initial parental density. The effects of competition on fitness components were quantified by fitting the data to both a two-stage selection model and a fertility model. Additional experiments were performed to verify that the interspecific competition caused the changes in fitness. The results are discussed in light of the importance of considering selection components in models of ecological genetics.

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