本文对丰抗兼优玉米新杂交种川农交9号的选育研究进行了总结。川农单交9号是在选育“三高”自交系48—2的基础上,用它与表型性状差异相对地大,目标性状与之互补的5003组配而成,并在加大选择压和多生态条件下鉴定出来的一个杂交种。该杂交种的突出特点是,把矮秆与大穗、丰产、多抗、中熟有机地结合于一体,具有广泛的适应性,对病害的多抗性以及种子生产的高产性,它具有广阔的开发前景。 In this paper, the breeding of Fengnongjiangyou 9, a new maize hybrid, was summarized. On the basis of breeding “three high” inbred lines 48-2, Chuannong Shanzuo 9 was matched with the 5003 group whose target trait was quite different from that of phenotypic traits, Large selection pressure and multi-ecological conditions identified a hybrid. The outstanding feature of this hybrid is that it combines the dwarf with big spike, high yield, multi-resistance and medium-maturity organically. It has a wide range of adaptability, multiple resistance to disease and high yield of seed production. It has a broad Development prospects.