In contrast, 10 of the 11 independent cDNA loci exhibit significant heterogeneity among populations and the mean FST value for the RFLPs is highly significant. Although both sets of markers are character- ized by having one highly variable locus, the most diver- gent EWLP locus (GM798) exhibits allele frequencyvari- atioan m onpg o pulationtsh at exceeds the most divergent allozyme locus (PPI) by a factor of 10.