论文部分内容阅读
分别以短蔓型和长蔓型笋瓜材料为亲本构建6世代群体,测量各群体不同节位节间长的变化,对节间长性状进行遗传规律分析。研究结果表明:节间长性状受核基因控制,F1群体的节间长性状在生长过程中存在发育逆转现象,逆转时期发生在6~15节位之间。遗传模型分析结果显示,在幼苗期和逆转期,笋瓜的节间长受到2对主效基因控制,符合E1模型,主基因方差能解释F2群体方差的70%以上;生长后期则受到主效单基因控制,符合D4模型,但主效基因效应不强,只能解释F2群体方差的10%,且环境因素对植株生长后期节间长具有明显影响。
The 6-generation population was constructed with short-winged and long-winged winter squashes respectively. The internode length of each population was measured and the genetic regularity was analyzed. The results showed that internode length traits were controlled by nuclear genes, and the internode length trait of F1 population had the phenomenon of reversal of development during the growth, and the reversal occurred in 6-15 nodes. The results of genetic model analysis showed that internode length of winter squash was controlled by two major genes at seedling stage and in the reversal stage, which was in line with the E1 model. The variance of major genes could account for over 70% of the variance of F2 population. Single-gene control, in line with the D4 model, but the major effect is not strong, can only explain the variance of F2 population of 10%, and environmental factors on plant growth later internodes have a significant impact.