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Table 5.

Summary of genetic associations between traits involved in selection for desiccation resistance in D. melanogaster from three sets of lines of different founders

Correlated traitHoffmann and ParsonsRose and coworkersPresent studyReferences
Water loss rate ↓ ↓ ↓ 1, 2 
Metabolic rate ↓ ↓ — 3, 4, 5* 
Wet weight NC ↑ ↑ 3, 2, 6 
Dry weight NC ↓ ↑ 3, 2 
Glycogen/carbohydrate — ↑ NC 5, 6 
Hemolymph volume — ↑ NC 
Lipid level NC ↓ ↑ 4, 5, 6 
Water content NC ↑ NC 1, 6, 7 
Dehydration tolerance NC NC ↑ 3, 2 
Development time NC ↑ ↑ 6, 1 
Early fecundity ↓ NC ↓ 3, 8 
Starvation resistance ↑ ↑ ↑ 3, 9 
Correlated traitHoffmann and ParsonsRose and coworkersPresent studyReferences
Water loss rate ↓ ↓ ↓ 1, 2 
Metabolic rate ↓ ↓ — 3, 4, 5* 
Wet weight NC ↑ ↑ 3, 2, 6 
Dry weight NC ↓ ↑ 3, 2 
Glycogen/carbohydrate — ↑ NC 5, 6 
Hemolymph volume — ↑ NC 
Lipid level NC ↓ ↑ 4, 5, 6 
Water content NC ↑ NC 1, 6, 7 
Dehydration tolerance NC NC ↑ 3, 2 
Development time NC ↑ ↑ 6, 1 
Early fecundity ↓ NC ↓ 3, 8 
Starvation resistance ↑ ↑ ↑ 3, 9 

Reference abbreviations: 1, Hoffmann and Parsons(1993); 2, Gibbs et al.(1997); 3, Hoffmann and Parsons (1989a); 4, Hoffmann and Parsons (1989b); 5,Djawdan et al. (1998); 6,Chippindale et al. (1998); 7,Folk et al. (2001); 8,Chippindale et al. (1993); 9,Rose et al. (1992).

↑, increase; ↓, decrease, NC, no change; —, not measured.

*

The associations are for mass-specific metabolic rate. Djawdan et al.(1998) controlled for the amount of non-metabolizing mass (such as lipid and carbohydrate) and found that the negative association between metabolic rate and desiccation resistance disappeared.

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