THE EFFECT OF DEVELOPMENTAL TEMPERATURE ON THE GENETIC ARCHITECTURE UNDERLYING SIZE AND THERMAL CLINES IN DROSOPHILA MELANOGASTER AND D. SIMULANS FROM THE EAST COAST OF AUSTRALIA
Article first published online: 22 DEC 2010
© 2010 The Author(s). Evolution© 2010 The Society for the Study of Evolution.
Volume 65, Issue 4, pages 1048–1067, April 2011
How to Cite
van Heerwaarden, B. and Sgrò, C. M. (2011), THE EFFECT OF DEVELOPMENTAL TEMPERATURE ON THE GENETIC ARCHITECTURE UNDERLYING SIZE AND THERMAL CLINES IN DROSOPHILA MELANOGASTER AND D. SIMULANS FROM THE EAST COAST OF AUSTRALIA. Evolution, 65: 1048–1067. doi: 10.1111/j.1558-5646.2010.01196.x
- Issue published online: 4 APR 2011
- Article first published online: 22 DEC 2010
- Accepted manuscript online: 22 NOV 2010 03:39AM EST
- Received August 8, 2010, Accepted October 25, 2010
- line cross;
Body size and thermal tolerance clines in Drosophila melanogaster occur along the east coast of Australia. However the extent to which temperature affects the genetic architecture underlying the observed clinal divergence remains unknown. Clinal variation in these traits is associated with cosmopolitan chromosome inversions that cline in D. melanogaster. Whether this association influences the genetic architecture for these traits in D. melanogaster is unclear. Drosophila simulans shows linear clines in body size, but nonlinear clines in cold resistance. Clinally varying inversions are absent in D. simulans. Line-cross and clinal analyses were performed between tropical and temperate populations of D. melanogaster and D. simulans from the east coast of Australia to investigate whether clinal patterns and genetic effects contributing to clinal divergence in wing centroid size, thorax length, wing-to-thorax ratio, cold and heat resistance differed under different developmental temperatures (18°C, 25°C, and 29°C). Developmental temperature influenced the genetic architecture in both species. Similarities between D. melanogaster and D. simulans suggest clinally varying inversion polymorphisms have little influence on the genetic architecture underlying clinal divergence in size in D. melanogaster. Differing genetic architectures across different temperatures highlight the need to consider different environments in future evolutionary and molecular studies of phenotypic divergence.