Abstract
Extracts of cotyledons of Brassica napus plants (seed progenies of doubled haploid plants) were separated by electrophoresis on polyacrylamide gels and stained for acid phosphatase (ACP-E.C. 3.1.3.2.) and leucine aminopeptidase (LAP-E.C. 3.4.11.1.) enzymes to investigate the possibility of utilising isozymes as markers of homogeneity (purity) of plant populations. One zone of activity for acid phosphatase and two zones of activity for leucine aminopeptidase were identified on gels, some variation in isozyme patterns occurred in several androgenetic lines. This method is appropriate and consistent for testing the homogeneity of breeding lines-progenies of double haploid (D.H.) plants.
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