２　日本日本烟草科研机构在烟草育种工作中紧密结合烟草生产，在种质资源、抗病育种、育种技术等方面进展显著。２１　烟草品种资源工作日本很重视烟草品种资源的收集、整理、研究与利用等方面的工作。日本烟草公司（ＪＴＩ）在进行了长达２５年的世界范围的研究基础上，由 2 Japan’s Japan Tobacco Research Institute closely integrates tobacco production in tobacco breeding and has made remarkable progress in germplasm resources, disease-resistant breeding and breeding techniques. 21 Tobacco Variety Resources Work Japan attaches great importance to the collection, collation, research and utilization of tobacco variety resources. Japan Tobacco Corporation (JTI) on the basis of a 25-year worldwide study, by the