南斯拉夫玉米自交系改良我国优良杂交种的遗传潜势研究

以9个引进南斯拉夫玉米自交系为母本、11个分属于不同优势类群的8个优良杂交种的亲本自交系为父本,组配107个杂交组合,采用Dudley方法分析了利用南斯拉夫自交系改良我国优良杂交种产量的遗传潜势、利用方法及改良的主要穗粒性状。结果表明，引进自交系具有较高的间接利用价值，9801、9802、9803、9805、9807、9808、9809可以分别通过改良不同亲本自交系的不同穗粒性状提高各杂交种的产量水平。具体改良效果还有待通过进一步的育种实践予以印证。

Genetic Potentiality of Utilizing Yugoslavia Maize Inbred Lines to Improve Chinese Elite Hybrids

In this study, 107 crosses were made using 9 Yugoslavia maize inbred line as female and 13 parent lines of 8 Chinese elite hybrids, belonging to different heterotic groups, as male. Though Dudley's method the genetic potentiality of 9 Yugoslavia maize inbred lines were analyzed for the improvement in the yield of 8 Chinese elite hybrids and main ear -kernel characters, and for their proper applications. The results showed that the introduced Yugoslavia inbreds had broad genetic basis and high breeding value in indirect utilization.Almost all Yugoslavia inbreds, including 9801, 9802, 9803, 9805, 9807, 9808, and 9809, could improve the yield of Yuyu15, GailiangYuyu20, Yuyu22, Yuyu23, Yuyu24, Shendn10 and Nongda 108 through different parents and ear-kernel characters, while the real improving effects should be proved in further practical breeding.