概述了国内外抗青枯病烟草种质抗性遗传特性和抗性相关分子标记研究、分析了我国种质资源的抗性鉴定结果、比较了中国和美国抗青枯病品种的抗性以及亲本.TI448A是国内外少数抗青枯病种质资源之一,其抗性由多对加性基因控制,美国烤烟品种的青枯病抗性大多来源于TI448A.烟草青枯病抗性容易受环境影响,且与TI448A抗性相关的分子标记缺乏.因此,鉴定抗病种质和抗病育种,需要建立稳定可靠的抗性鉴定方法、进行多年多点的抗性鉴定.开发分子标记尤其需要采用永久性遗传群体.提出了抗青枯病育种存在的问题,并讨论了解决办法.%Bacterial wilt (BW) caused by Ralstonia solanacearum is a major disease in tobacco. Use of resistant varieties against BW is a major economic and efficient measure to control economic lose. Genetic features and molecular markers related to BW from both domestic and foreign documents were reviewed and analyzed. Specific comparison was made between resistance germplasm in China and from United States, as well as their parents. TI448 A is one of few tobacco germplasm showing high resistance to bacterial wilt worldwide, with resistance controlled by several additive genes, and contribute the resistance of most flue-cured tobacco varieties in United States. Resistance to BW is considerably susceptible to environmental impact, and molecular markers related to resistance of TI448A is far from practical use. Therefore, identification of resistance by reliable method is important in screening germplasm and breeding new resistant varieties. Incomplete resistance identification network and method, lack of high resistant elite parents are problems in breeding flue-cured tobacco cultivars resistant to BW in China.
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