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Measurement of Lifespan in Drosophila melanogaster
Published on: January 7, 2013
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ARTIFICIAL SELECTION FOR DEVELOPMENTAL TIME IN DROSOPHILA MELANOGASTER IN RELATION TO THE EVOLUTION OF AGING: DIRECT
Bas Zwaan1, R Bijlsma1, R F Hoekstra2
1Department of Genetics, University of Groningen, Kerklaan 30, 9751 NN, Haren, The Netherlands.
Summary
Selection for fast or slow development in fruit flies did not alter adult lifespan. However, developmental speed influenced body weight and female fecundity patterns, offering insights into aging theories.
Area of Science:
- Evolutionary Biology
- Genetics
- Gerontology
Background:
- Developmental timing is a key life-history trait.
- Its relationship with aging and longevity is a significant area of research.
- Previous studies suggest potential trade-offs between development and lifespan.
Purpose of the Study:
- To investigate the genetic basis of developmental time in Drosophila melanogaster.
- To determine if selection for altered developmental rates impacts adult longevity.
- To explore pleiotropic effects of developmental selection on other life-history traits.
Main Methods:
- Artificial selection was applied to a wild-type Drosophila melanogaster strain for fast and slow larval development.
- Realized heritability was estimated for both selection lines.
- Adult longevity, body weight, and fecundity were measured in selected lines and controls.
Main Results:
- Realized heritabilities for developmental time ranged from 0.20 to 0.60.
- Adult longevity was unaffected by selection for developmental speed.
- Body weight was higher in slow-developing lines and lower in fast-developing lines.
- Slow-developing females exhibited higher early and lower late fecundity compared to controls.
Conclusions:
- Developmental time is not a direct causal determinant of adult lifespan in Drosophila.
- Selection for developmental rate has pleiotropic effects on body weight and fecundity.
- These findings contribute to understanding the evolution of aging and life-history trade-offs.
