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以群体材料Ｃ０为原始材料育成高配合力优良玉米自交系５０１。用常用系Ｂ尖八为母本与５０１组配杂交，育成早熟杂交种京玉一号。１９９７年５月京玉一号通过北京市农作物品种审定委员会的审定。京玉一号在北京市夏播生育期１０１天，一般亩产４４０ｋｇ，比唐抗５号增产１３％，达极显著水平。京玉一号综合性状优良，稳产性好，兼抗华北地区多种玉米主要病害，适宜在北京、天津、廊坊、保定地区夏播，在华北春播早熟区春播。作者对玉米群体改良及其应用、提高育种速度缩短育种周期、早代测交及姊妹系选择等问题进行了讨论。
Breeding high maize inbred line 501 with population material C0 as raw material. With the commonly used B-tip eight female and 501 group with the hybrid, bred Jingyu one precocious hybrid. In May 1997, Jingyu No.1 passed the examination and approval of Beijing Crop Variety Approval Committee. Beijing Jade One Summer Sowing in Beijing, the growth period of 101 days, the general mu produce 440kg, Tang anti-5 increased 13%, reaching a significant level. Jingyu No.1 has good comprehensive properties, stable yield and good resistance to many maize diseases in North China. It is suitable for summer sowing in Beijing, Tianjin, Langfang and Baoding and spring sowing in the spring sowing area of North China. The authors discussed the improvement of maize population and its application, the speed of breeding, the shortening of breeding cycle, early dating and sister selection.