玉米杂交种中种868号的选育

The breeding and selection of corn hybrid Zhongzhong 868

中种868生育期128 d,需≥10℃积温2 700℃,属中晚熟玉米杂交种,具有高产、稳产、多抗等特点,适宜在吉林省、黑龙江省、内蒙古、辽宁省等地区种植,种植密度以4.2万～4.5万株/hm^2为宜;制种时,母本与1/2父本同期播种,另外1/2父本在父母本出芽以后播种,种植比例1：4.

Zhongzhong 868 hybrid grow period expect for 128 days, need≥10 ℃ accumulate 2700 ℃, belong to middle and late hybrid, have high produce, steady yield, more resistances and other good traits, adjust to Jilin province , Heilongjiang province, Inner Mongolia municipality, Liaoning province and so on. Its appropriate planting density is 42000- 45000 stubs/hm^2. While breeding the hybrid, female and half of the male originally can be sew at the same time, the other half of the male originally can be sew when female has been brouht out, which rate is 1：4.