玉米双交156在农一师地区推广种植多年,在粮食生产上发挥了一定的增产作用.但近年来,本品种混杂退化严重,且不抗病,迫切需要有抗病、高产的优良品种来代替它.玉米单交种是由两个自交系选配而成; The double crossbreeding of corn 156 promoted planting for many years in Nongyi division and played a certain role in increasing grain yield.However, in recent years, this hybrid degenerated seriously and did not resist disease, so it is urgent to have excellent varieties with disease resistance and high yield Instead of it, maize crosses are made from two inbred lines;