采用人工剥苞多次授粉方法,将近缘一年生二倍体类玉米(大刍草)与普通玉米自交系杂交,对F1、F2以及回交后代B 1的抽雄期、吐丝期、散粉期、株高、穗位高、分蘖进行调查研究,分析远缘杂交后代农艺性状的遗传变化.结果表明,远缘杂交后代株高、穗位高分离变异较大,而抽雄期、吐丝期、散粉期分离变异较小,不同世代植株分蘖变化较大,F1代有57.5%植株、F2代有23%植株、BC1F1代有0.8%植株有分蘖;雌穗光周期敏感性大于雄穗. Artificial peel - breaking multiple pollination method, the annual diploid hybrid corn (Dushe grass) and common maize inbred lines, F1, F2 and the backcross generation B 1 tasseling, silking, loose powder period , Plant height, ear height and tiller were studied to analyze the genetic changes of agronomic traits of distant hybridization generations.The results showed that the variation of plant height and ear height was highly significant in distant hybridization offspring, while tasselling, silking, There were 57.5% plants in F1 generation, 23% plants in F2 generation and 0.8% plants in BC1F1. Tillers were more sensitive to light cycle than those in male.