定量检测不同产地鲜烟叶与烤后烟叶中淀粉、葡萄糖、果糖和蔗糖的含量,分析各糖类物质间含量相关性,比较烘烤前后各糖类物质含量变化,并研究不同产地鲜烟叶及烤后烟叶的糖类物质含量特性.结果表明:鲜烟叶中淀粉含量与烤后烟叶中葡萄糖、果糖及蔗糖含量均呈显著正相关,蔗糖含量与烤后烟叶中所有糖类物质含量均呈中等负相关;在鲜烟叶与烤后烟叶中,果糖、葡萄糖含量相当;黑龙江产鲜烟叶中淀粉含量最高,河南产鲜烟叶中淀粉含量最低,云南产鲜烟叶中还原糖、蔗糖含量最高;云南产烤后烟叶中淀粉转化最充分,黑龙江产烤后烟叶中淀粉含量最高,河南产烤后烟叶中葡萄糖、果糖含量显著低于其他产地的.

Generally,the varieties of the same kind of plant render distinctive diversities that might lead to extremely different applications.To explore a potential method of classification for the varieties of one single plant,four groups of tobacco have been taken as an example to classify the different varieties.When classifying these four groups of tobacco varieties based on the dataset of chemical compositions,four feature selections,which are max-relevance-min-redundancy (mRMR),sequential backward floating selection (SBFS),genetic algorithm (GA),random forest (RF) have been employed.The result shows that SBFS is the best method,due to the highest accuracy in SVM models.Five features have been selected from the intersection of four algorithms.These four features are proline acid,potassium content,rutin,citric acid and pH,which might be the most important chemical compositions related to varieties of tobacco potential.The set of method might be possible to be applied into other plants' applications.