叶形是水稻株型重要组成部分，其发育遗传调控网络研究是叶形改良的关键所在。利用9311与培矮64S构建的高代重组自交系群体，结合株系叶片表型测定、群体单株全基因组深度测序和构建近等基因系，进行叶形主效QTL的精细定位与分离，研究不同QTL间的互作关系及与产量的关联分析。在完成SLL1、SRL1等多个叶形基因克隆的基础上构建双（多）突变体，利用基因芯片和生物信息学，分析不同叶形调控基因在叶片发育中的分子机理及相互作用机制；采用回复抑制突变方法，诱变处理卷叶突变体sll1和srl1，获叶片回复平展的卷叶抑制突变体，并通过图位克隆技术分离抑制基因Sup-SLL1和Sup-SRL1，分析上下游基因的调控关系。借助传统育种与现代生物技术，改良水稻叶形，开展理想株型超级稻分子设计育种利用研究。研究结果将进一步阐明水稻叶形发育的遗传调控网络，同时为超级稻选育奠定良好的理论基础和材料基础。

Leaf morphogenesis is one of the important components of rice plant type. Study on its development and regulation network is the key to leaf shape improvement. Advanced recombinant inbred line populations were derived from 9311 and Pei'ai 64S. With the determination of leaf shape, the whole genome deep sequencing of all population lines and construction of near-isogenic lines，major QTL affecting leaf shape has been targeted for fine mapping and isolation，research was made on correlation analysis of QTL interaction and yield. After cloning leaf morphogenesis such as SLL1 and SRL1, double/multi mutants were constructed to analyze the regulation and interaction of leaf morphogenesis in rice growth at the molecular level. Induced mutation was applied to rolled leaf mutant sll1 and srl1 through reverse mutation to obtain rolled leaf suppressor mutant with normal leaves. With map-based cloning, suppressing genes Sup-SLL1 and Sup-SRL1 were isolated and regulation relation of upstream and downstream genes was analyzed. Assisted by traditional breeding and modern biological technology, rice leave shape was improved. The result of the research will further elucidate the regulation network of leaf morphogenesis in rice, provide new approaches and new materials for rice super-high yield molecular design breeding which has ideal plant achitecture by moulding its leaf shape, and will help to understand the mechanism regulating leaf morphology.