Abstract: This paper studied the indirect utilization of the introduced Yugoslavia inbreds through 14 S2 lines from 478×three introduced inbreds and their 56 testcrosses with Chinese elite inbreds belonging to different heterotic groups.The result showed that the Yugoslavia inbreds 9804、9805、9806 were effective in 478 improvement.In the 14 generation lines , the GCA of 3 lines was significantly positive and had great value in breeding. The per –plant yield of 13 crosses was higher significantly than check by 4.55%-33.28% in the 56 testcrosses. But their utilization value in production should be tested furthermore.