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First published online May 1, 2006
Journal of Experimental Biology 209, 1837-1847 (2006)
Published by The Company of Biologists 2006
doi: 10.1242/jeb.02201
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A new set of laboratory-selected Drosophila melanogaster lines for the analysis of desiccation resistance: response to selection, physiology and correlated responses

Marina Telonis-Scott*, Kathryn M. Guthridge and Ary A. Hoffmann{dagger}

Centre for Environmental Stress Adaptation Research, La Trobe University, Bundoora, Victoria 3086, Australia


Figure 1
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  		Fig. 1. Survival curve of the two selected and control lines (shown as average percentage survival per hour) when stressed, in groups of 10. (A) Females (filled markers); (B) males (open markers).

 

Figure 2
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  		Fig. 2 (A) Egg to adult development time (25°C). Ten eggs were placed in vials and scored at 6-h intervals until all flies had eclosed. Open bars indicate females, while filled bars represent males. The error bars are standard errors around the mean of 20 replicates. (B) Early fecundity. Patterns of early fecundity were observed in pairs of 0–1-day-old flies, where egg production within a 24 h period was recorded at the same time daily for 5 days and was assessed as the mean number of eggs produced in total per line. The error bars are standard errors around the mean of 15–18 replicate pairs.

 

Figure 3
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  		Fig. 3. Correlated stress responses. (A) Starvation resistance scored every 8 h until 50% mortality, with error bars as standard errors around the mean of three replicates of 10 females. (B) Cold mortality at –2°C for 2.5 h, average mortality after 24 h, with error bars as standard errors around the mean of 13 replicates of 10 females.

 

Figure 4
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  		Fig. 4. Average desiccation resistance of the eight F2 genotypes (females tested) generated from the crosses described in the Materials and methods.

 




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