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Quantitative trait loci for lifespan of mated Drosophila melanogaster affect both sexes

Published online by Cambridge University Press:  17 February 2003

SARAH G. REIWITCH
Affiliation:
Section of Evolution and Ecology, University of California at Davis, Davis, CA 95616, USA
SERGEY V. NUZHDIN
Affiliation:
Section of Evolution and Ecology, University of California at Davis, Davis, CA 95616, USA
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Abstract

The properties of alleles at quantitative trait loci (QTLs) contributing to variation in lifespan should be described to determine the mechanisms of evolution of life length and to predict its future changes. Previously, we and others conducted genome-wide screens for QTLs that segregate among one panel of recombinant inbred lines (RILs) using a dense molecular marker map. In non-stressful conditions, QTLs effecting the lifespans of virgin females and males were frequently sex specific. In an unrelated panel of RILs, the effects of QTLs in flies maintained in cages with mixed sexes were similar in both sexes. Here, we re-measured the lifespans of the former panel of RILs in cages with mixed sex cohorts. Lifespan declined owing to mating. The amount of decline correlated between sexes within lines. QTLs mapping to the intervals 15A–19C, 50B–57C, 63A–65A, and 96F–99B had similar effects on the lifespans of both males and females. These QTLs have previously been detected in virgin flies surveys and had sex- and/or environment-specific effects.

Type
Research Article
Copyright
© 2002 Cambridge University Press

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