玉米雄性不育的利用,是降低种子成本,提高种子纯度的有效途径。自1931年Rhodes发现玉米雄性不育以来,T型雄性不育的利用曾得到迅速发展,至1970年,美国的T型杂交种几乎占总杂交种面积的90％,但由于采用单一的胞质类型,对小斑病T小种的专化感染缺乏认识,致使小斑病T小种 Utilization of maize male sterility is an effective way to reduce seed cost and improve seed purity. Since the discovery of maize male sterility by Rhodes in 1931, the use of T-type male sterility has been rapidly developed. By 1970, T-hybrids in the United States accounted for almost 90% of the total hybridized area but due to the use of a single cytoplasm Type, the small patch of T race specific infection lack of understanding, resulting in small spot disease T race