对超级玉米育种目标及技术路线的再思考（Second thoughts on the target and technical route of supercorn breeding）.doc

对超级玉米育种目标及技术路线的再思考（Second thoughts on the target and technical route of supercorn breeding） Second thoughts on the target and technical route of supercorn breeding Zhao jiuran, sun shixian Abstract: based on the demand of maize production and the development of scientific research in China, the goal of super maize breeding is further put forward: super-high yield, high quality hair, multi-resistance, broad and easy to be made. Breeding methods: new germplasm, large group, high density, change ground, strong force, strict choice. This paper discusses the significance of super corn, the meaning of super corn and the matching of fine varieties. At the same time, the concept of ideal plant type and zero defect species are also described. Chinas present situation and future demand for corn Maize is the second largest crop in China, with an annual planting area of 27 million hectares, with annual output of more than 130 million tons. China is the second largest producer and consumer of corn in the world after the United States. Chinas corn production and consumption have an important influence on world corn supply and demand. Maize is the king of high yield and has important ecological stability function. At present, the record of Chinas corn is 21,039kg/ha (shandong laizhou, 2005), and the worlds highest single-yield record is 27754.5kg/ha (us, 2002). The average corn yield in the United States has exceeded 9,000 kg/ha, and many large areas yield more than 15,000 kilograms per hectare. There are also lots of plots in our country that are over 15,000 kg/ha, which indicates that the potential of maize yield is still very high. Maize is the main force of grain production in China, and is one of the main crops to ensure food security in China. 70% of the total amount of corn in China is used directly or indirectly for feed, which is the pillar of livestock farming. Corn is also an important raw material and bioenergy crop. Arid and semi-arid areas in China accounts for about