本研究利用寒地 2 0世纪 90年代的合江 19等 9个主栽中秆品种及半矮秆品种龙花 94 595、矮秆品种矮绥化选共 11份材料 ,配制 2 1个组合 ,调查 2 1个组合的 F1、F2 代及有关 B1、B2 世代株高 ,探讨了寒地早粳品种的矮秆遗传特性 ,结果表明 :合江 19等 9个中秆品种及龙花 94 595株高是属于带有数量性状遗传特征的主基因加微效多基因控制的混合遗传 ;矮绥化选的矮秆性状由单基因控制 ,且与半矮秆品种龙花 94 595、中秆品种合江 19等的矮秆性状是等位的 ,是同一位点间显隐性基因的遗传 ;普特 1具有对株高有正效应的修饰基因 ;龙花 94 595等具有对株高有负效应的修饰基因 ,龙粳 10则没有 ;具有株高修饰基因负效应的龙花 94 595等与寒地早粳中秆品种杂交 ,可以有效提高其 F2 代理想株高植株频率 In this study, 9 main and middle dwarf cultivars such as Hejiang 19 in the cold land in the 1990s were dwarfed varieties Longhua 94 595, 11 short dwarf varieties were selected to prepare 21 combinations, the investigation The results showed that 9 middle-stem cultivars such as Hejiang 19 and 94 595 plant height of Longhua Which belongs to the mixed inheritance controlled by the major genes with the quantitative trait and minor allele. The dwarfing traits of Diani selection are controlled by a single gene, and are closely related to the semi-dwarf varieties Longhua 94 595, middle stalk variety Hejiang 19 Such as the dwarf trait is allelic, is the same locus recessive gene inheritance; Put 1 has a positive effect on the plant height modified gene; Longhua 94 595 and other plants have a negative effect on the modification And Longjing 10 did not. Longhua 94 595, which had the negative effect of plant height-modified gene, crossed with the early-maturing middle-aged cultivars in cold region, which could effectively increase the plant height