玉米自交系种子的生产方法与自花授粉作物种子的生产方式相同 ,但要注意严格隔离 (50 0 m以上 )。为了保证杂交玉米制种纯度 ,必须首先保证自交系种子纯度。在自交系种子不纯时 ,应当严格提纯。1　穗行鉴定提纯法在自交系混杂较轻时可采用此法。第一年在自交系繁殖区选典型优良 Maize inbred lines are produced in the same way as self-pollinated seeds, but with strict isolation (over 500 m). In order to ensure the purity of hybrid corn seed, we must first ensure the purity of inbred seed. In inbred seed impure, it should be strictly purified. 1 ear identification purification method in inbred lines mixed with light when this method can be used. In the first year of inbred breeding area selected typical good