Analysis on Heterotic Pattern of Main Agronomic Characters of the Six Exotic Maize Germplasm Resources

Usng six inbred lines which selected from exotic germplasm resources and five inbred lines representing five local groups as parent lines and thirty combinations were obtained by the method of incomplete diallel cross.In order to definite the heterotic pattern of six inbred lines with the five groups,we made an analysis of the heterosis using ultra high dominating value and ultramiddle dominating value.The results indicated inbred lines C-1,C-2,C-3 with Lvda Red Cob group,C-1 with Reid group and C-6 with Lancaster group,PN78599 group had strong heterosis in yield,respectively.There were easy to appear high yield combinations with the groups,therefore the six inbred lines could be used in practice directly,and establish new heterotic pattern.