The fork arm is gradually formed by the fierce rivalry and apical dominance of lateral branches after the main gib is damaged to wither or break. 红松杈干是主梢受害枯死或断折后,经侧枝的激烈竞争和顶端优势的驱使下逐渐邢成的。
Fruit size appears to be controlled by multiple genes without complete dominance. 果实大小应由多基因控制,没有完全显性的现象。
Additive variance was higher than dominance variance, which indicates quantitative inheritance. 加性的变异高于显性的变异,表明是数量遗传。