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ALLOZYMIC DIFFERENTIATION IN RESPONSE TO LABORATORY DEMOGRAPHIC SELECTION OF DROSOPHILA MELANOGASTER
Author(s) -
DeckertCruz Denise J.,
Tyler Robert H.,
Landmesser Jacob E.,
Rose Michael R.
Publication year - 1997
Publication title -
evolution
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.84
H-Index - 199
eISSN - 1558-5646
pISSN - 0014-3820
DOI - 10.1111/j.1558-5646.1997.tb03668.x
Subject(s) - biology , phosphoglucomutase , drosophila melanogaster , selection (genetic algorithm) , genetics , pleiotropy , evolutionary biology , population , drosophila (subgenus) , disruptive selection , alcohol dehydrogenase , allele frequency , allele , population genetics , natural selection , phenotype , enzyme , gene , biochemistry , demography , artificial intelligence , sociology , computer science
Drosophila melanogaster populations that exhibit constrasting life histories as a result of laboratory selection were compared at several potentially relevant enzyme loci. Selection regimes included postponed reproduction, accelerated development, and intermediate generation time. Each selection regime was represented by fivefold replicated populations maintained for between 50 and 500 generations. For each population, allele frequencies were calculated from frequencies of electrophoretically distinguishable allozymes of alcohol dehydrogenase, α‐glycerol‐3‐phosphate dehydrogenase, phosphoglucomutase, and CuZn‐superoxide dismutase. Based on allozyme frequency changes consistent across replicate populations, two of the studied loci responded to both selection for postponed reproduction and selection for accelerated development. The responses to contrasting selection regimes were in opposing directions, suggesting antagonistic pleiotropy.