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Genetics

Title:		Genetic mapping of sexual isolation between E and Z pheromone strains of the european corn Borer (Ostrinia nubilalis)
Author(s):		Dopman EB; Bogdanowicz SM; Harrison RG;
Address:		"Department of Ecology and Evolutionary Biology, Cornell University, Ithaca, New York 14853, USA. ebd5@cornell.edu"
Journal Title:		Genetics
Year:		2004
Volume:		167
Issue:		1
Page Number:		301 - 309
DOI:		10.1534/genetics.167.1.301
ISSN/ISBN:		0016-6731 (Print) 0016-6731 (Linking)
Abstract:		"The E and Z pheromone strains of the European corn borer (ECB) provide an exceptional model system for examining the genetic basis of sexual isolation. Differences at two major genes account for variation in female pheromone production and male behavioral response, components of the pheromone communication system known to be important for mate recognition and mate choice. Strains of ECB are morphologically indistinguishable, and surveys of allozyme and DNA sequence variation have revealed significant allele frequency differences at only a single sex-linked locus, Tpi. Here we present a detailed genetic linkage map of ECB using AFLP and microsatellite markers and map the factors responsible for pheromone production (Pher) and male response (Resp). Our map covers 1697 cM and identifies all 31 linkage groups in ECB. Both Resp and Tpi map to the Z (sex) chromosome, but the distance between these markers (>20 cM) argues against the hypothesis that patterns of variation at Tpi are explained by tight linkage to this 'speciation gene.' However, we show, through analysis of marker density, that Tpi is located in a region of low recombination and suggest that a second Z-linked reproductive barrier could be responsible for the origin and/or persistence of differentiation at Tpi"
Keywords:		"Alleles Animals Chromosome Mapping/*methods Female Gene Frequency Genetic Linkage Genetic Markers Genotype Lepidoptera/*genetics Male Microsatellite Repeats Models, Genetic Pheromones/*genetics/metabolism Protein Isoforms Recombination, Genetic Sex Attrac;"
Notes:		"MedlineDopman, Erik B Bogdanowicz, Steven M Harrison, Richard G eng Research Support, U.S. Gov't, Non-P.H.S. 2004/05/29 Genetics. 2004 May; 167(1):301-9. doi: 10.1534/genetics.167.1.301"