Abstract: 4 water field wheat cultivars were selected as the female parents and 4 dry field wheat cultivars as the male parents, 16 hybrid combinations were formulated using the 4*4 incompleted dialled in dry farming. Four dry parents with M2.5 dose were treated by radiation, 16 hybrid combinations were completed using the 4*4 incompleted dialled. The result shows that: the general coordinate force’s effect of single grain weight of Zhongyou 9507, Luoyou 9906 and Luoyou 9909 increases after they were radiated. The factors of yield’s construction about the spike number per plant, the grain number per spike, the grain’s weight –1000 and the biology yield per plant are the same. The general genetic ability and the narrow genetic ability of them reduced. But the rang of the general genetic ability reduction is greater for grain weight per plant and the grain number per spike, it is same for the narrow genetic ability reduction for the length of spike. The general genetic ability of the grain number per spike and the grain weight per spike reduced, but the narrow genetic of them increased.