特早熟玉米杂交种选育研究

根据育种目标 ,选用非亲缘不同熟期的单交种、综合种及自交系作为育种材料 ,采取逐步导入法 ,实行多次重组 ,连续累积有利基因 ,提高目标性状植株频率 ,成功地培育出综合性状优良的特早熟自交系太早 950 2、太早 950 3、太早 950 4 ,育成特早熟杂交种春早单 1号和春早单 2号。育种目标得到实现 ,说明这一育种方法是有效可行的。

A Study on Selection of Special Early Mature Maize Hybrid

According to the breeding targets, interlinear hybrids, synthetic varieties and inbred lines which were non related and mature at different time were used gradual introduction method and multiple recombination were made to continuously accumulate favorable genes and increase the frequency of plants with target characters. In this way, special early mature inbred lines with good comprehensive characters like “Taizao 9502”,“Taizao 9503” and “Taizao 9504” as well as special early mature hybrids, “Chunzaodan 1” and “Chunzaodan 2” were bred. The breeding method was feasible proved by this study.