Abstract
Polyacrylamide gel electrophoresis was used to examine the systematics of Dipodomys ordii occurring in the South Canadian River floodplain of Oklahoma. Allozymic variation in 14 genetic loci was analyzed from 10 localities. Eight loci were monomorphic in all populations. Mean heterozygosity was 2.4%. Based on biochemical characters, there was no clear separation of western and eastern forms, and no evidence suggests that these forms were behaving as different biological species. Genic evidence supports previous morphologic and karyotypic studies of D. ordii in Oklahoma and concurs with current taxonomy which places western forms as D. o. richardsoni and eastern as D. o. oklahomae.
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