利用南斯拉夫玉米自交系改良478的效果初报

本研究通过对14个（478×外引系）后代选系与国内属于不同优势类群的8个骨干自交系杂交组配的56个测交组合的配合力和杂种优势研究结果表明：利用南斯拉夫自交系9804、9805、9806改良478是可行和有效的，在14个（478×外引系）优良后代选系中，有3个选系的GCA为显著和极显著正值，具有较高的直接组配利用价值。在56个测交种中，有13个单株产量显著或极显著高于CK 3.85%~33.28%。

The Preliminary Results on the Improvement to 478 Using Yugoslovia Maize Inbreds

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.