Genetic Variation and Phylogenetic Relationships Among Six Populations of Corn Borers in China

The genetic variation among and within sixpopulations of the corn borer was determined by usingrandom amplified polymorphic DNA (RAPD) markers.Extensive genetic variability was detected. Of the 802RAPD markers obtained, 781 (97.4%) were polymorphicamong populations. Genetic similarities and distancesbetween each pair of individuals were calculated. UPGMAcluster analysis showed that the YN population (Ostrinia nubilalis Hubner) and the other fivepopulations (Ostrinia furnacalis Guenee) made upbranches of the corn borer lineage, instead ofdeviating; there was no significant geneticdifferentiation between YN and the other five corn borerpopulations.