关键词: 土地利用变化, 土地利用变化, 定量模型, 区域差异, 山东省

Abstract: New sorghum breeding technology infers any other breeding techniques except traditional natural selection breeding and artificial cross breeding. It mainly includes tissue culture breeding, space breeding, physical mutagenesis breeding, chemical mutagenesis breeding and transgenic breeding technology and some other potential breeding techniques. A long term sorghum breeding program with these new techniques has been carried out for many years , the systematic breeding procedures has been established ,valuable breeding materials has been developed ,several officially registered hybrids has been released .Based on our research experiences and combined with the relevant research reports, the progresses in the research and application of these breeding techniques were overviewed, and the characteristics , the problems ,and the potentiality of the new breeding techniques were discussed.. It stresses that the main characteristics of the new breeding technology as followings: it is suitable for the change of individual simple genetic traits; it takes less time and less expenses for sorghum improvement ,the breeding cycle is short, the offspring reaches stability fast and the scale of the field experiment is small; the variation is relatively small, but the new specific characters might be obtained.