Phosphoglucose isomerase (PGI) polymorphism in Sorbus torminalis (L.) Crantz

Abstract

Dormant buds of individual Sorbus torminalis trees collected from eight Polish populations were tested with horizontal gel electrophoresis according to one locus of PGI enzyme system. Three allozymes of different frequency were identified in each population. Genetic variability based on PGI locus A was high within seven populations (mean Ho=0.602 and mean Pg=0.491). Only one population with A3A3 genotypes was monomorphic, most probably due to intensive vegetative propagation or founder effect. The level of genetic differences among populations based on one variable locus reached GST=0.13.

Keywords

• Sorbus torminalis
• electrophoresis
• PGI
• genetic diversity