Abstract: Improved livestock and poultry breeds are critical to the development of animal husbandry industry. They are not only the foundation for development of regional animal husbandry industry, but also the focus of competition in science and technology of animal husbandry industry among various countries. Modern breeding technology of improved livestock and poultry breeds is composed of a series of technologies. Its employment in animal husbandry production aids in increasing the application efficiency of high-quality livestock and poultry for breeding use, speeding up the process of regional livestock and poultry breeding improvement, and improving livestock and poultry production performance. This paper introduced the application status of the main breeding technology of improved livestock and poultry breeds in China, analyzed the impacts of modern breeding technology of improved livestock and poultry breeds on feed and forage conversion efficiency as well as on selection efficiency of improved livestock and poultry breeds. In addition, this paper discussed the relationship between modern breeding technology of improved livestock and poultry breeds and input and output of livestock and poultry farm from economic perspective, in hoping to provide references for the construction of a modern breeding system for improved livestock and poultry breeds in China.

Key words: improved livestock and poultry breeds, breeding technology, economic perspective, application efficiency