Abstract: Peroxidase and esterase isozymes oF₁1 maize inbred lines and 8 maize hybrids were analyzed with electrophoresis. The rsults suggested that the sensitivity of peroxidase isozyme to distinguish different maize materials is higher than esterase. The difference of band pattern in maize inbred lines or hybrids is obvious ,but it don't display regularity changes with maize breeding eras. It is difficult to forecast maize heterosis based on the changes of peroxidase and esterase isozyme band because there is varied possibility in changes of isozyme band pattern from parents to their cross combination, increase, reduction as well as both of them existing simultaneously on different band regions in one maize material.

Key words: Mize, Breeding era, Peroxidase isozyme, Esterase isozyme, Heterosis

CLC Number: 

• S513.01