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Selection for Knockdown Resistance to Heat in Drosophila melanogaster at High and Low Larval Densities

Oleg A. Bubli, Alexandra G. Imasheva and Volker Loeschcke
Evolution
Vol. 52, No. 2 (Apr., 1998), pp. 619-625
DOI: 10.2307/2411097
Stable URL: http://www.jstor.org/stable/2411097
Page Count: 7
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Abstract

Responses to short-term selection for knockdown resistance to heat (37⚬C) in Drosophila melanogaster reared under stressful (high larval density) and nonstressful (low larval density) conditions were compared. No difference in selection response between density treatments was found. A test of heat resistance (39⚬C) after pretreatment (37⚬C) did not reveal an increase in survival for selected lines as compared to controls. Flies reared at high density had higher knockdown resistance throughout the experiment. Resistance to heat was not associated with body size.

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