超高产中早熟玉米杂交种选育探讨

本文分析了玉米超高产的潜在因素，着重探讨了玉米育种的重点—玉米育种材料的选育创新以及玉米自交系选育问题。明确提出：(1)在现有的玉米育种理论指导下，依靠现有的育种材料，在保持玉米经济系数和种植密度提高或不变的情况下，必须以提高玉米单株及其群体的生物产量为手段来提高玉米的经济产量；(2)以增加玉米植株节间的长度而不是增加玉米植株的全株叶片数为主要手段，从而保证高秆大穗品种一定的早熟性；(3)注意培育根系发达和茎秆坚韧的杂交种为高秆大穗品种的抗倒性提供保证。

Study on Breeding for Medium and Earlier Matured Super-high-yield Corn

In this article,we discussed some potential factors on improving corn yield and mainly eyed on the creation of the rural breeding materials and developing corn inbred line maize for medium and earlier matured super-high-yield corn breeding,our opinions are:(1)to improve the yield of corn by increase the biological output of single plant and populations (2)to make sure super-high-yield hybrid matured earlier by strengthening internode length,not by adding plant leaves (3)to insure the medium and earlier mutured super-high-yield hybrid has good lodging-resistence by selecting hydrid that has good developmental root system and tough stem.