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Characterization of the larval olfactory response inDrosophila and its genetic basis

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Abstract

Drosophila larvae are attracted to a wide variety of chemical stimuli. The olfactory response to ethyl acetate, a powerful attractant, was found to be surprisingly well conserved across a variety of different wild-type strains. Strain differences are documented, however, both in attraction to ethyl acetate and in another chemosensory behavior: avoidance of an aversive stimulus. As a means of analyzing the extent of genetic heterogeneity within strains, one wild-type population, Canton-S, was screened for variant X chromosomes. An enrichment procedure was characterized and used to make the screening more efficient. Lines homozygous for individual X chromosomes were established, and all were found to exhibit a strong olfactory response, although evidence was found for variation among them. The olfactory response was found to be conserved through an extended period of larval development, including the final period during which larvae leave the culture medium in preparation for metamorphosis. The results are discussed in terms of the genetic basis of the response and the use of single-gene mutations as a means of dissecting olfactory system function.

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This work was supported by NIH Grant GM-36862 to J.C.

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Monte, P., Woodard, C., Ayer, R. et al. Characterization of the larval olfactory response inDrosophila and its genetic basis. Behav Genet 19, 267–283 (1989). https://doi.org/10.1007/BF01065910

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  • DOI: https://doi.org/10.1007/BF01065910

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