A Gene Correlate of Geotaxis Near Adh (2-50.1) in Drosophila melanogaster

Authors

Scott F. Stoltenberg, University of Illinois at Urbana-ChampaignFollow
Jerry Hirsch, University of Illinois at Urbana-Champaign

Document Type

Article

Date of this Version

1996

Citation

Journal of Comparative Psychology 110:3 (1996), pp. 252–259.

doi: 10.1037/0735-7036.110.3.252

Comments

Copyright © 1996 American Psychological Association, Inc. Used by permission.

Abstract

As part of a long-term study (38+ years) to identify genetic correlates of geotaxis in Drosophila melanogaster, the investigators report the results of allozyme-level analyses of 2 lines derived from hybridizing high- and low-selected lines that have evolved stable, extreme expressions of geotaxis. Allelic variation at Adh was associated with geotactic performance in 1 hybrid-derived line, but not in another, after 66 free-mating generations beyond the F₂ generation. A second-chromosome gene correlate of geotaxis may lie within 1 map unit of Adh. Population genetic analyses suggest that there were different selection pressures on the hybrid-derived lines and that the fixation of PGD-A in the high-geotaxis line was probably due to a founder-effect event.