Genetics, Vol 143, 293-301, Copyright © 1996

INVESTIGATIONS

Effects of Single P-Element Insertions on Olfactory Behavior in Drosophila melanogaster

RRH. Anholt, R. F. Lyman and TFC. Mackay
Departments of Zoology, North Carolina State University, Raleigh, North Carolina 27695

Single P-element (P[lArB]) insertional mutagenesis of an isogenic strain was used to identify autosomal loci affecting odor-guided behavior of Drosophila melanogaster. The avoidance response to benzaldehyde of 379 homozygous P[lArB] element-containing insert lines was evaluated quantitatively. Fourteen smell impaired (smi) lines were identified in which P[lArB] element insertion caused different degrees of hyposmia in one or both sexes. The smi loci map to different cytological locations and probably are novel olfactory genes. Enhancer trap analysis of the smi lines indicates that expression of at least 10 smi genes is controlled by olfactory tissue-specific promoter/enhancer elements.

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