@article{anholt_dilda_chang_fanara_kulkarni_ganguly_rollmann_kamdar_mackay_2003, title={The genetic architecture of odor-guided behavior in Drosophila: epistasis and the transcriptome}, volume={35}, ISSN={["1546-1718"]}, DOI={10.1038/ng1240}, abstractNote={We combined transcriptional profiling and quantitative genetic analysis to elucidate the genetic architecture of olfactory behavior in Drosophila melanogaster. We applied whole-genome expression analysis to five coisogenic smell-impaired (smi) mutant lines and their control. We used analysis of variance to partition variation in transcript abundance between males and females and between smi genotypes and to determine the genotype-by-sex interaction. A total of 666 genes showed sexual dimorphism in transcript abundance, and 530 genes were coregulated in response to one or more smi mutations, showing considerable epistasis at the level of the transcriptome in response to single mutations. Quantitative complementation tests of mutations at these coregulated genes with the smi mutations showed that in most cases (67%) epistatic interactions for olfactory behavior mirrored epistasis at the level of transcription, thus identifying new candidate genes regulating olfactory behavior.}, number={2}, journal={NATURE GENETICS}, author={Anholt, RRH and Dilda, CL and Chang, S and Fanara, JJ and Kulkarni, NH and Ganguly, I and Rollmann, SM and Kamdar, KP and Mackay, TFC}, year={2003}, month={Oct}, pages={180–184} } @article{kulkarni_yamamoto_robinson_mackay_anholt_2002, title={The DSC1 channel, encoded by the smi60E locus, contributes to odor-guided behavior in Drosophila melanogaster}, volume={161}, number={4}, journal={Genetics}, author={Kulkarni, N. H. and Yamamoto, A. H. and Robinson, K. O. and Mackay, T. F. C. and Anholt, R. R. H.}, year={2002}, month={Aug}, pages={1507–1516} } @article{anholt_fanara_fedorowicz_ganguly_kulkarni_mackay_rollmann_2001, title={Functional genomics of odor-guided behavior in Drosophila melanogaster}, volume={26}, ISSN={["0379-864X"]}, DOI={10.1093/chemse/26.2.215}, abstractNote={The avoidance response to repellent odorants in Drosophila melanogaster, a response essential for survival, provides an advantageous model for studies on the genetic architecture of olfactory behavior. Transposon tagging in a highly inbred strain of flies in combination with a rapid and simple statistical behavioral assay enables the identification of not only large phenotypic effects, but also small aberrations from wild-type avoidance behavior. The recent completion of the sequence of the Drosophila genome facilitates the molecular characterization of transposon-tagged genes and correlation between gene expression and behavior in smell-impaired (smi) mutant lines. Quantitative genetic analyses of a collection of smi lines in a co-isogenic background revealed an extensive network of epistatic interactions among genes that shape the olfactory avoidance response. Candidate genes for several of these transposon-tagged smi loci implicate genes that mediate odorant recognition, including a novel odorant binding protein; signal propagation, including a voltage-gated sodium channel; and a protein containing multiple leucine rich repeats and PDZ domains likely to be involved in postsynaptic organization in the olfactory pathway. Several novel genes of unknown function have also been implicated, including a novel tyrosine-regulated protein kinase. The discovery and characterization of novel gene products that have major, hitherto unappreciated effects on olfactory behavior will provide new insights in the generation and regulation of odor-guided behavior. The identification and functional characterization of proteins encoded by smi genes that form part of the olfactory subgenome and correlation of polymorphisms in these genes with variation in odor-guided behavior in natural populations will advance our understanding of the genetic architecture of chemosensory behavior.}, number={2}, journal={CHEMICAL SENSES}, author={Anholt, RRH and Fanara, JJ and Fedorowicz, GM and Ganguly, I and Kulkarni, NH and Mackay, TFC and Rollmann, SM}, year={2001}, month={Feb}, pages={215–221} }