At present, the materials and methods of maize breeding have made great breakthroughs, and new varieties and new inbred lines have made remarkable achievements. However, it still faces various challenges and needs constant efforts and serious research.

The problems in maize breeding are:

1, there is a certain gap between China's corn industry and foreign countries.

China's corn industry has developed rapidly, and its output and consumption are among the highest in the world, but there is still a certain gap compared with foreign countries. The reasons for this problem are not only the different suitability of planting environment, but also the problems of mechanical planting and land fertility.

2. The ability of scientific and technological innovation is not high, and the level of technical application is low.

However, the newly developed new maize inbred line products lack effective promotion, and hybrid series maize seeds are still used in most areas, mainly because the innovation of maize planting raw materials is low and the natural environment is different in different areas, which leads to different adaptability of new maize inbred line products in different areas and can not get effective benefits. It can be seen that there is still a lot of room for improvement in China's corn breeding industry, which needs to be studied from transgenic, backcross, selfing and other directions. In addition, some corn enterprises have many problems that need to be solved urgently, such as large technical gap and operational errors.

3. The breeding is not targeted enough and there are few seed resources.

Light, natural environment and other aspects will have an impact on maize breeding. The natural requirements of plain area and higher altitude area are different, so we should cultivate adaptable maize seeds according to suitable geographical conditions. But now, despite the continuous research and development of corn seeds in China, there are still many corn varieties with poor adaptability, which can not be effectively popularized, can not adapt to the natural environment of individual regions, and even some are prone to pests and diseases, which greatly reduces the yield.

At present, traditional maize breeding technology is still the main breeding method in many areas, which restricts the cultivation of excellent maize inbred lines and new varieties in China, and Chinese breeding experts rely on their own breeding experience as the main breeding basis, which has poor stability. China relies heavily on foreign germplasm resources and technology, which is not conducive to the development of maize breeding in China. In this case, strengthening independent germplasm innovation and technology research and development, constructing new breeding materials, and strengthening germplasm amplification, improvement and innovation have become the development direction of maize breeding in China.