Abstract:

Abstract：The lines Ji846 and K10 were crossed with subtropic germplasm from CIMMYT to construct semi-exotic population and select improved lines. Some combinations resulted from improved lines and the other to measure and analyze the improvement effect in yield and agronomy traits. The main results suggested that the yield of some combinations from K10 and improved Ji846 were higher than CK variety. The plant height and ear height were lower than CK variety. Tassel ramification numbers, leaf area of whole strain、shelling percentage, 100-kernal weight had apparent improved effects in partial combinations. The yield of combinations from improved K10 and Ji846 were lower than CK variety. Partial agronomic traits had some improvement effect, such as 100-kernel weight, shelling percentage, kernel number per row, ear length.