Abstract
Eight strains belonging to Oryza sativa and O. perennis (Asian form) were intercrossed, and the hybrid plants were observed for peroxidase isozymes of the leaf blades by starch-gel electrophoresis method. Band 4C was found to be specified by an active gene, Pe4C. Bands 2A and 4A were specified by allelic genes, Pe2A and Pe4A, respectively. Their heterozygotes produced a hybrid dimer band, 3A, between 2A and 4A. Further, diallel crosses were made among ten plants randomly chosen from a population of O. perennis. The data suggested that there might be a regulatory gene, R4C, repressing band 4C. The loci of Pe4C, R4C and Pe2A/Pe4A appeared to be independent of one another.
