Allozyme Differentiation between Pheromone Strains of the European Corn Borer, Ostrinia nubilalis1,2

Abstract

Sympatric populations of 2 pheromone strains of the European corn borer, Ostrinia nubilalis (Hübner), from central Pennsylvania have significantly different allele frequencies at 4 genetic loci coding for soluble enzymes. These sympatric populations clearly do not represent a single panmictic unit. However, analysis of allele frequency differences does not reveal whether the 2 strains should be considered distinct species. Despite statistically significant differences in allele frequencies, the 2 strains exhibit remarkable genetic similarity at the loci examined.