y planted in China with an annual area of almost 1 million ha. The LD brand registered by the institute is becoming very famous in China. The elite inbred lines, Qi205, Qi319 and lx9801 released by this institute have been widely used in several heterotic patterns popular in China. Among these hybrids, Lu yu 13 was awarded second-rank prize of Science and Technology Advancement Prize by MOA, LD 50 was awarded first-rank prize of Science and Technology Advancement Prize by Shandong Province. This