超高产、多抗性、优质玉米新杂交种鲁单7045(LD7045)，组合为齐3925×Lx9311。介绍了玉米新杂交种鲁单7045的选育背景、选育过程及品种特征特性等，提出了育种目标、选系技术与方法、杂种优势模式等方面的创新思路。

The super-high yield of new type maize hybrid Ludan7045 had been bred by crossing Qi3925 with Lx9311.It took part in regional trials of Beijing in 2005 - 2008, was examined and approved by the committee in 2009. The results of regional trials showed Ludan7045 that had super-high yield, stable yield, much resistance, high quality, wide adaptability, medium late-maturing, big ear and high yield potential. This paper introduced the breeding goals, selecting methods and use of heterosis modes about Ludan7045. At last, the authors were put forward on creative experiences about the successful selection of Ludan7045.

国家科技支撑计划项目(2007BAD31B03)、山东省农业科学院创新基金项目(2007YCX005)、山东省农业科学院青年基金项目(2007YQN016)