从研究各类品种功能叶面积与植粒重的关系入手，确定培育亚种间重穗型组合的超高产育种路线及其技术关键，经将近十年的工作，培育出了一批大穗型不育系和广亲恢复系，组配出Ⅱ优6078等系列亚种间重穗型组合，五年试验示范表明，Ⅱ优6078在壮苗稀植栽培下，能比油化63增产15％以上。 Starting with the study on the relationship between functional leaf area and grain weight of various cultivars, the key to cultivating super-high-yielding breeding lines of intersubspecific-panotypes and its technical key were determined. After nearly ten years of work, a series of large panicles Sterile line and broad-parent restorer line, the group with Ⅱ You 6078 and other series of subspecies heavy panicle combinations, five-year pilot demonstration shows that Ⅱ You 6078 seedlings planted under strong sprouting, oil yield 63 more than 15% the above.