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以隐性高秆与正常高秆及互不等位的半矮秆杂交及后代测交表明，隐性高秆由隐性的长节间基因ｅｕｉ所决定，除了ｅｕｉ基因之外，隐性高秆还有半矮生基因ｓｄ－１，基因型为ｅｕｉｅｕｉｓｄ－１ｓｄ－１，正常高秆为ＥｕｉＥｕｉＳｄ－１Ｓｄ－１，ｅｕｉ与ｓｄ－１相互独立。隐性高秆和具有ｓｄ－１基因的半矮秆杂交，Ｆ２表现为ｅｕｉ基因的分离，分离比为１高秆∶３半矮，与正常高秆杂交表现为ｅｕｉ和ｓｄ－１两对基因的分离，分离比为１３高秆∶３半矮。讨论了长节间基因在杂交水稻育种中的利用途径。
The recessive tall stalks and normal tall stalks and the unequal semi-dwarf hybrids and offspring cross test indicated that the recessive stalks were determined by the recessive internode gene eui. In addition to the eui gene, the recessive height Stems also have semi-dwarf gene sd-1, genotype euieuisd-1sd-1, normal tall stems are EuiEuiSd-1Sd-1, eui and sd-1 are independent of each other. Semi-dwarf hybrids with recessive tall stalk and sd-1 gene were isolated. F2 showed the segregation of eui gene. The segregation ratio was 1 tall stalk: 3 semi-stubby, and the normal high stalk hybridized with two pairs of eui and sd-1 genes Of the separation, separation ratio of 13 tall: 3 semi-dwarf. This paper discussed the ways of using the internode gene in hybrid rice breeding.