橡胶树一般要定植4～5年才开花,由于有性世代周期长,限制了杂交育种的进展。为了克服这一障碍,国内外学者曾进行促进橡胶幼树早开花的研究,采用弯枝、环剥树皮、对叶面喷施香豆素或三碘苯甲酸(TIBA)等处理.均收到良好效果。然而,这些方法只对处理的植株有效,不能遗传给后代,而且,若处理不当还会出现枝条干枯或风断。如果能找到开花早的品系,将其早花的遗传基因通过杂交转移到育种材料中去,可能也是缩短有性世代周期、加速育种工作进 Rubber trees generally planted 4 to 5 years before flowering, due to the sexual generation of a long cycle, limiting the progress of cross breeding. In order to overcome this obstacle, scholars at home and abroad have conducted researches on early flowering of rubber saplings, such as bending branches and ring-peeling barks, and spraying coumarin or triiodobenzoic acid (TIBA) on the foliage. To good effect. However, these methods are only effective for the treated plants and can not be passed on to offspring, and dry branches or blight can occur if they are not handled properly. If we can find early flowering lines, the genetic transfer of their early flowers through hybridization to the breeding material may also be to shorten the sexual generation cycle, and accelerate breeding work into