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利用籼稻窄叶青８号和粳稻京系１７的杂交Ｆ１以及衍生的ＤＨ系，对水稻籼粳交的卷叶性状进行遗传分析；结果表明，叶片平展对卷曲为显性，卷叶植株受两对隐性基因控制。应用ＤＨ系已构建的分子图谱将这两对卷叶基因定位于第１染色体的Ｃ９４９—Ｇ３７０和第５染色体的ＲＧ１３—ＲＧ５７之间，其中第１染色体的卷叶位点，与经典遗传图谱已定的ｒｌ－１位于同一区段，本研究沿用该名。第５染色体上的卷叶基因是一个未定位的新基因，暂定名为ｒｌ－７，且这两对基因存在基因互补作用。
The leaf-rolling traits of indica-japonica hybrid rice (Oryza sativa L.) and indica japonica hybrid rice (Jixi17) were analyzed by genetic analysis. The results showed that leaf flattening was dominant to curly, Control of recessive genes. Application of DH molecular map has been constructed these two pairs of leaf curl genes located on the first chromosome C949-G370 and the fifth chromosome RG13-RG57 between the first chromosome leaflet locus, and the classical genetic map has been The rl-1 is located in the same section, the name used in this study. The leaf-opening gene on chromosome 5 is an unlocated new gene tentatively named rl-7, and the two genes have the function of gene complementarity.