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用Nair法对87个自交系进行分组,选用高秆、中秆和矮秆自交系为材料,观察F_1、F_2以及F_1与亲本回交的遗传效应。同时分析节间数与节间长度与矮化的关系。研究结果表明,矮秆遗传的表达有两种方式,一为质量性状,受一对主效矮秆隐性基因控制,但矮化自交系的遗传背景有区别。一为数量性状,F_2代分离呈正态分布。作者观察到在高秆自交系中潜存着矮秆基因。矮秆自交系一般伸长的节间数不比高秆系少,主要是节间缩短。矮化的F_1代植株高大,也是节间伸长所致。
87 inbred lines were grouped by Nair method. The high-stalked, medium-stalked and dwarfed inbred lines were used as materials to observe the genetic effects of F_1, F_2 and F_1 backcrossing with their parents. At the same time, the relationship between internode length and internode length was analyzed. The results showed that there are two ways to express dwarf heredity: one is quality trait controlled by one dominant recessive dwarf recessive gene, but the genetic background of dwarfing inbred lines is different. One is quantitative trait, F_2 generation separation was normal distribution. The authors observed the presence of dwarf genes in tall culms. Dwarf inbred lines in general than the number of internodes tall stalks less, mainly internodes shortened. Dwarf F_1 generation of tall plants, but also due to internodal elongation.