You are not currently logged in.
Access your personal account or get JSTOR access through your library or other institution:
If You Use a Screen ReaderThis content is available through Read Online (Free) program, which relies on page scans. Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Allozymic Differentiation in Response to Laboratory Demographic Selection of Drosophila melanogaster
Denise J. Deckert-Cruz, Robert H. Tyler, Jacob E. Landmesser and Michael R. Rose
Vol. 51, No. 3 (Jun., 1997), pp. 865-872
Published by: Society for the Study of Evolution
Stable URL: http://www.jstor.org/stable/2411161
Page Count: 8
Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Preview not available
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.
Evolution © 1997 Society for the Study of Evolution