PGI Isozyme Diversity and Its Genetic Control in Mango

Abstract

Leaf phosphoglucose isomerase (PGI) isozymes from 139 cultivars and seedlings of mango (Mangifera indica L.) were analyzed by starch gel electrophoresis. Six distinct banding patterns of PGI-2 consisting of single- and triple-banded phenotypes were detected. The genetic control of PGI-2 isozymes were inferred from segregating progenies of self-pollinated parent cultivars having triple-banded phenotypes. Comparison of the banding patterns of PGI-2 isozymes extracted from the pollen and the leaf of the same heterozygous cultivar demonstrates the allelism of the Pgi-2 locus.