“高产、优质、多抗玉米杂交种选育”进展较好全国玉米攻关“高产、优质、多抗玉米杂交种选育”专题，１９９３年在辽宁沈阳、山西祁县（１春播点）、山东济南、河南郑州、陕西杨陵（夏播点）等地进行新品种多点展示试验。参试品种共２３４个，每点参试种在４０一５２个之... “High yield, high quality, multi-resistance to maize hybrid breeding,” the better the progress of national corn research “high yield, high quality, multi-resistant hybrid corn breeding,” the topic, in 1993 in Shenyang, Liaoning, Shanxi Qixian (1 Spring Festival), Shandong Jinan, Zhengzhou, Henan, Shaanxi Yangling (summer broadcast spots) and other places to carry out new varieties of multi-point display test. A total of 234 test varieties, each point of test varieties in 40 a 52 ...