Journal article

DIRECT AND CORRELATED RESPONSES TO SELECTION FOR DESICCATION RESISTANCE - A COMPARISON OF DROSOPHILA-MELANOGASTER AND D-SIMULANS

AA HOFFMANN, PA PARSONS

JOURNAL OF EVOLUTIONARY BIOLOGY | BIRKHAUSER VERLAG AG | Published : 1993

Abstract

Replicate lines of Drosophila melanogaster and D. simulans originating from the same location in Australia were selected at two selection intensities (50%, 85% mortality) for increased resistance to desiccation, and scored for correlated responses to see if similar physiological changes were associated with the selection responses. Realized heritabilities were much higher in D. melanogaster. Selected lines of both species were more resistant than control lines to starvation and a toxic ethanol concentration. Both species also showed similar correlated responses for traits underlying the selection response: selected lines lost water at a slower rate and had reduced activity levels in a dry en..

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University of Melbourne Researchers