Abstract
Abstract Leaf samples of over 100 avocado (Persea americana Mill.) cultivars and 8 other Persea species were analyzed for isozyme variation of peroxidase (PX), malate dehydrogenase (MDH), leucine aminopeptidase (LAP) and phosphoglucose mutase (PGM). MDH, LAP and PGM isozymes of leaf and mesocarp were identical. Isozymes of alcohol dehydrogenase (ADH) and glutamate oxaloacetate transaminase (GOT) were detected in mesocarps but were not available from leaves. Leaf PX isozymes were specified by 3 genes having 11 alleles and MDH isozymes by 1 gene with 3 alleles. To date, 6 enzyme systems specified by 12 genes with 37 codominant alleles are available as genetic markers of possible use in problems of avocado systematics, measurements of outcrossing rates, documentation of parentages and screening of seedlings in breeding programs.
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