用9.699C·kg-1Co60γ射线直接照射恢复系R127干种子,在M2群体获高秆突变体，记为eR127。研究结果表明，该突变基因与贵州的Grlc，江苏的02428h和美国的76∶4512、IR50eui等高秆突变体的基因属等位基因；用eR127和R127组配龙特浦A、冈46A、珍汕97A和威20A等三系不育系,成对杂种株型无明显差异,但含有eui基因的杂种比相应不含eui基因的杂种早熟2～3d,植株稍高，千粒重增加，有更高的产量潜力；eR127作为制种田父本不需喷920就可达到制种高产的效果。%Dried seeds of restore line R127 were treated with γ rays of9.699 C·kg-1 Co60 and the mutants were obtained from M2 population, named eR127. The research results indicated,the mutation gene of R127 belonged to recessive one and eR127 line was allelic to such recessive tall mutants as Grlc of Guizhou, 76∶4512 of the United States, IR50 eui and 02428h of Jiangsu； When eR127 and R127 were crossed with CMS lines Longtepu A, Gang46 A, Zhenshan97 A and V20 A respectively, the plant type of hybrid F1 didn’t show significantly difference, however, compared with control, hybrids carrying eui gene showed 2-3 days earlier heading, a slightly increased plant height, higher 1000-grain weight and yield potential；seed breeding field of restoring line eR127 not sprayed 920 also gain high yield.
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