Isozyme band variation within the algal species Pandorina morum

Ten clones from five collections of the freshwater green alga Pandorina morum, taken from four sites and representing three syngens, were analyzed for electrophoretic variants of five enzyme. Isozyme bands of different mobility were found in isolates from different syngens, different sites, and even the same site and syngen; the pattern of variation differed with the enzyme studied. The results suggest care is needed in choosing isozyme mobilities as syngen or species characters.