Local Sun-Cured Tobacco Germplasm Resources for the Genotypic Difference of Tobacco Black Shank Resistance and the Mechanisms of Tobacco Black Sh

为了发掘地方晒烟抗烟草黑胫病种质，寻找烟草抗黑胫病育种抗性亲本，本研究通过对这些晒烟进行室内烟草黑胫病抗性鉴定，发现不同品种间抗性差异明显，抗病品种有鸡皮种、部叶637、邵黄一号、寸三皮等13个品种；中抗品种有早谷烟、苦麻叶、白岩大花；中感品种有麻阳泉烟、把固毛烟；选择10个对烟草黑胫病抗、感性不同的品种进行了生化反应与抗性关系的研究，结果表明人工接种后，抗性品种多酚氧化酶活性、超氧化物歧化酶活性、木质素含量均高于感病品种。 Aiming to explore germplasm resources of the local sun-cured tobacco which were resistant to the tobacco black shank was identified in field period in this study in order to the methods identification the tobacco black shank in breeding. The result showed that there were significant differences in resistance among different species. The 13 species were high-resistance varieties such as Jipizhong, Buye637 and so on. Cunsanpi; Hanguyan, Kumaye, Baiyandahua were medi-um-resistance varieties; susceptible varieties were Bagumaoyan and Mayangquanyan. The study was conducted on the relationship between biochemical reactions and resistance mechanisms of the 10 species with different resistance to tobacco black shank. The results showed that the resistant varieties polyphenol oxidase, superoxide dismutase activity, wood hormone levels of the resistant species after artificial inoculation were higher than susceptible ones.