Codominant isoenzymic alleles as markers of genetic diversity correlated with heterosis in maize (Zea mays).

The average F1 yields were found to be significantly correlated with the genetic diversity of the parental strains calculated from the zymogram patterns of five enzyme systems in a sample of eight strains and their diallelic crosses.Despite the relatively small number of loci (eight) studied, there is evidence that these codominant alleles are good markers for genetic heterogeneity that is a source of heterosis.