Publication with datasets Hallas et al. 2002, Clinal variation in Drosophila serrata for stress resistance and body size, Genetical Research


ABSTRACT: Clines for size and stress resistance traits have been described for several Drosophila species and replicable clines across different species may indicate climatic selection. Here we consider clines in stress resistance traits in an Australian endemic species, D. serrata, by comparing levels of variation within and among isofemale lines initiated with flies collected from the eastern coast of Australia. We also consider clinal variation in chill coma recovery, a trait that has recently been shown to exhibit high levels of variation among Drosophila species. Patterns were compared with those in the cosmopolitan species D. melanogaster from the same area. Both desiccation and starvation resistance showed no clinal pattern despite heritable variation among isofemale lines. In contrast chill coma resistance exhibited a linear cline in the anticipated direction, resistance increasing with latitude. Body size was measured as wing length and body weight. Both traits showed geographic variation and strong non-linear clines with a sharp reduction in size in the tropics. These results are discussed in the context of climatic selection and evolutionary processes limiting species borders.


  • 07 Hallas et al. 2002, Stress resistance and size

    This data file contains means and standard deviations (SD) of starvation resistance (time to death in hours), mass (mg) and wing length (mm) for females and males and desiccation resistance (time to death in hours) and cold recovery time (minutes) for females. All traits were measured for 20 Drosophila serrata populations collected in 2000 (Fig. 2-4). Note longitudes in data are approximate.

Publication Citations

  • Hallas, Rebecca, Schiffer, Michele, and Hoffmann, Ary A., 'Clinal variation in Drosophila serrata for stress resistance and body size', Genetical Research, vol. 79, no. 2, Cambridge University Press, 2002, pp. 141-148. Details