目前常规技术仍然是玉米育种的主要方法,但是生物技术的迅速发展为育种家提供了新的技术手段。用生物技术方法培育的转基因玉米杂交种已经在许多国家投入生产使用。生物技术研究耗费巨资,同时又有很高的利润回报。生物技术产品的产业化开发引起了玉米种子产业的合并浪潮,同时使 At present, conventional techniques are still the main method of corn breeding, but the rapid development of biotechnology provides new technical means for breeders. Transgenic corn hybrids grown using biotechnological methods have been put into production in many countries. Biotechnology research costs huge sums of money, and at the same time has a high profit return. Industrialization of biotech products has led to a wave of mergers in the corn seed industry while