鉴定玉米材料早熟性的主要方法是根据幼苗和成株的形态解剖性状.但此法在育种材料栽植于田间之前尚不能得到结果,而且费用高,工作效率低.苏联专家最近研究创造了一种简便的鉴定方法.理论依据是,他们研究证明,游离色氨酸是作物发育过程的抑制剂.因此胚乳中色氨酸浓度可作为生育期长短的间接指标. The main method of identifying maize material prematurity is based on the anatomical traits of seedlings and adult plants, but this method can not get the result before the planting material is planted in the field, and the cost is high and the work efficiency is low. Recently, Soviet experts have created a The simple method of identification is based on the fact that their studies demonstrate that free tryptophan is an inhibitor of crop development and therefore the tryptophan concentration in the endosperm can be used as an indirect indicator of the length of growth.