一、玉米胚胎杂种优势的存在及产生原因玉米从受精到籽粒成熟阶段有无杂种优势(胚胎杂种优势)存在,近年来有些科研工作者相继作了报道。所谓胚胎杂种优势即指玉米植株上的杂合籽粒比自交籽粒有增积、增重的现象。赵文耀通过玉米自交系间杂交与自交对比试验,玉米单交种及再杂交时的对比试验和验证性试验,在1981年曾指出了 First, the existence of corn embryo heterosis and the reasons for the existence of corn from fertilization to the maturity stage of the existence of hybrid heterosis (embryo heterosis) exist, in recent years, some researchers have been reported. The so-called embryo heterosis refers to the corn plants hybrid seeds than the self-seeding seed accumulation, weight gain phenomenon. ZHAO Wen-yao Through inbred lines between maize inbred lines and self-self-contrast test, maize single cross-species and then cross-hybrid test and confirmatory test, in 1981 pointed out