论文部分内容阅读
研究表明,贵州高原粳稻或矮秆粳稻均存在极显著的品种间光呼吸速率(Pr)、净光合速率(Pn)差异,而Pr/(Pn+Pr)比值的类型内品种间差异不显著,矮秆粳稻的Pr/(Pn+Pr比值却显著高于高原粳。三个光合生理性状在F_1代均有杂种优势存在,优势强弱因组合而异。它们都是由多基因控制或多基因与主基因共同控制的数量性状。基因效应分析结果表明,Pr的遗传不符合加性——显性模型,加性X显性互作效应是极显著的。而Pn的遗传用m、(d)、(h)三种基因效应已足够解释其遗传控制系统的性质,加性及显性效应是显著或极显著的。在品种及不同组合F_2代群体内Pr与Pn的相关都是显著或极显著的。Pr/(Pn+Pr)比值在F_2代有遗传变异出现,在一些组合中有低Pr和高Pn的个体出现。
The results showed that there were extremely significant differences in photosynthetic rate (Pn) and net photosynthetic rate (Pn) between Guizhou and Dwarf japonica cultivars in Guizhou Plateau, but no significant difference among Pr / (Pn + Pr) The Pr / (Pn + Pr) ratio of dwarf japonica rice was significantly higher than that of highland japonica rice.The three photosynthetic physiological traits existed heterosis in F_1 generation, and their superiority and weakness were due to the combination.They were all controlled by polygenes or polygenes The number of traits controlled by the major genes.The results of gene effect analysis showed that the inheritance of Pr did not accord with the additive-dominance model and the additive X dominant interaction effect was significant ), (H) The three genetic effects were sufficient to explain the nature of the genetic control system, and the additive and dominant effects were significant or extremely significant. The correlation between Pr and Pn was significant or significant in F_2 population of different breeds and combinations Significantly, the ratio of Pr / (Pn + Pr) appeared to be a genetic variation in the F2 generation, with individuals with low Pr and high Pn in some combinations.