摘要： 对5个普通玉米自交系与4个爆裂玉米自交系组配的20个普×爆组合F3、BC11F2、BC12F2的膨爆特性及其与两类亲本关系的研究结果表明:普通玉米种质对普×爆后代的膨爆特性影响显著,选择适宜的普通玉米种质、恰当组配普×爆组合,对于普通玉米种质在爆裂玉米育种中的有效利用起着关键性的作用;普×爆组合F3的膨爆特性均较差,一代回交可使其显著提高,最高分别为F3的50,2 200,1 100,基本达到对爆裂玉米膨爆特性的要求指标;双回交世代间差异不显著.

关键词: 爆裂玉米, 普通玉米, 自交, 回交, 膨爆特性

Abstract: The expansion characteristics and their relationships ith the two kinds of parents were analyzed through F₃,BC₁₁F₂, BC₁₂F₂ of 20 normal corn @ popcorn crosses made from 5 normal corn inbreds and 4 popcorn lines. The results showed that normal corn germplasms had great effect on the expansion characteristics of the offsprings from normal corn @ popcorn crosses. Proper normal inbreds selecting and their cross-making with popcorn inbreds play a great role in popcorn breeding in this condition.All the expansion characters were low, but they were greatly improved through only one generation backcrossing to popcorn inbreds. The highest values of 3 expansion characters for BC₁₁F₂ and BC₁₂F₂ were 750, 2200, 1100 compared with F₃( its value was considered 100), which basically reached to the expansion indexes of popcorn. There was no significant difference between BC₁₁F₂ and BC₁₂F₂.

Key words: Popcorn, Normal corn, Selfcross, Backcross, Expansion characteristic

中图分类号: 

• S513