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Selection for circadian eclosion time in Drosophila melanogaster
Science (New York, N.Y.)
|December 1, 1972
Summary
The study developed early and late eclosion strains in Drosophila melanogaster. Older Oregon-R strains showed greater selectability, suggesting reduced selective advantage for circadian behaviors in lab settings.
Area of Science:
- * Chronobiology
- * Animal Behavior Genetics
Background:
- * Circadian rhythms are crucial for organismal adaptation.
- * Laboratory conditions may alter the selective pressures on these behaviors.
Purpose of the Study:
- * To investigate the selectability of circadian behaviors in Drosophila melanogaster.
- * To compare the selectability of established versus newly collected strains.
Main Methods:
- * Development of early and late eclosion strains from Drosophila melanogaster.
- * Comparison of selectability between the Oregon-R (1925) and W(2) (1971) parent strains.
Main Results:
- * The older Oregon-R strains exhibited significantly higher selectability.
- * The W(2) strain, collected more recently, showed lower selectability.
Conclusions:
- * Findings support the hypothesis that selective advantage of circadian behaviors diminishes under laboratory conditions.
- * Long-term laboratory adaptation may reduce the genetic basis for robust circadian timing.