Abstract
The occurrence of three dimeric peroxidase isozymes specified by alleles Pe2A and Pe4A was confirmed from observation of a cross between two strains of Oryza perennis. The intensity ratio of the three isozyme bands, 2A, 3A and 4A, deviated from the expected distribution pattern in lemmas and paleas of the F1 plants and most of the F2 heterozygous segregants. Among 25 F2 heterozygotes, only one showed the expected distribution pattern. Both types of distribution pattern may be explained by differential allelic activities due to allele-specific inducing systems, though other factors may be involved.
