Abstract
Glossina morsitans centralis Machado was collected from the main fly belt west of Mumbwa Zambia and from the apparently isolated ‘Keembe pocket’ and 11 gene-enzyme systems were examined by polyacrylamide gel electrophoresis. There were no significant differences in allele frequencies among flies collected entering a vehicle, from fly-rounds, or from F3 traps in the main fly belt. Mean heterozygosity per locus is slightly higher in flies from the main fly belt than it is in flies from the ‘Keembe pocket’. Allele frequencies at loci for xanthine oxidase ( X o ), aldehyde oxidase ( A o ) and a thoracic esterase ( Est-2) were significantly different in the two populations and it is concluded that there is little gene flow between them.
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