Abstract
On the basis of the pulsed field gel electrophoresis(PFGE) technique, molecular karyotypes in Amoeboaphelidiumprotococcarum (the endotrophic parasite of chlorophycean algae, whichcombines protozoon- and fungus-type characters) were determined. Molecularkaryotypes in the strains X1, X5, and X31, which differ in the host range andoriginate from Western, Central, and Eastern Euro-Asia respectively,demonstrate the intrageneric polymorphism-from 7 to 13 chDNA bands-with theestimated molecular size of 0.3-2.2 Mb were resolved, and the genome sizewas determined to be between 7.4 and 10.2 Mb. The molecular karyotype patternin A. protococcarum is different from that in Protozoa. The low-gradedistinction in molecular karyotypes between X1 and X5, on one hand, andhigh-grade distinction between X1/X5 and X31, on the other hand, makes itpossible to place X31 in a separate taxon.
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