In 1984, parents, F1, F2, and F3 populations of three crosses of Glycine max x G. soja, G. max x G. gracilis and G. max x G. max had been planted simultaneously for comparison of the inheritance of several agronomic charac-ters of the above three different soybean crossing combinations. Performance of lines or cultivars of different species used as parents can be shown in Table 1. These results reveal that: The sequence of magnitude of variation of the agronomic characters of F3 population is: G. max x G. soja > G. max x G. gracilis > G. max x G. max.