Oct 1, 1997


Evolution; International Journal of Organic Evolution
Adam K ChippindaleMichael R Rose


Developmental time is a trait of great relevance to fitness in all organisms. In holometabolous species that occupy ephemeral habitat, like Drosophila melanogaster, the impact of developmental time upon fitness is further exaggerated. We explored the trade-offs surrounding developmental time by selecting 10 independent populations from two distantly related selection treatments (CB1-5 and CO1-5 ) for faster development. After 125 generations, the resulting accelerated populations (ACB1-5 and ACO1-5 ) displayed net selection responses for development time of -33.4 hours (or 15%) for ACB and -38.6 hours (or 17%) for ACO. Since most of the change in egg-to-adult developmental time was accounted for by changes in larval duration, the "accelerated" larvae were estimated to develop 25-30% faster than their control/ancestor populations. The responses of ACB and ACO lines were remarkably parallel, despite being founded from populations evolved independently for more than 300 generations. On average, these "A" populations developed from egg to adult in less than eight days and produced fertile eggs less than 24 hours after emerging. Accelerated populations showed no change in larval feeding rate, but a reduction in pupation height, the ...Continue Reading

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Mentioned in this Paper

ACB (Acebutolol)
ACB1 protein, S cerevisiae
Energy Metabolism
Iron Regulatory Protein 1
Biologic Development
Accelerated particle

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