Abstract:

CIMMYT germaplasm Pob46 and Pob45 were introduced respectively the male inbred lines Ji846 and female inbred lines 444. The improvement effect of yield and other agronomic characters was studied. It showed that in the hybrids crossed by the improved lines of Ji846 and 444, plant height and ear height were decrease, lodging resistance character was enhanced, ear-kernel weight was increased,. The yield of these crosses decreased commonly, only individual crosses increased; The improvement effect of some characters was different in these crosses, such as the first class branch number of tassel and kernel number per row.