Studies on the difference of chemical components and neutral aroma components in different genotypes of flue-cured tobacco

Nine genotypes of flue-cured tobacco producted in central area of Henan Province were used as meterials,comparing the contents of chemical components and neutral aroma constituents.The result shows that main chemical components have significant differences among different genotypes,the largest variation of potassium;neutral aroma components in various tobacco leaves were basically the same,but the content was different.Total content of neutral aroma components of middle leaves ranging from high to low were KRK 28,NC 72,NC 71,KRK 26,NC 102,NC 297,CC 402,NC 89,zhongyan 100.The contents of products degraded by carotene,the products of browning reaction,the products of aromatic amino acid metabolism and the neophytadiene in KRK 28 were higher,and the products degraded by cembrane in NC 297 were higher,while zhongyan 100 was lower.