Study of Correlation Relationships between Yield and Chemical compounds in Some Tobacco Cultivars Grown in Syria

Abstract

The research was carried out in the farms of the Tobacco Research Center at the General Tobacco Corporation — Lattakia. Seeds of five tobacco cultivars were planted to study yield performance, chemical Contents, and the correlations among these traits.

The results showed variability in yield and chemical Contents (nicotine, sugars, protein, NPN, phosphorus, and chlorine) among the studied cultivars, depending on genetic constition and growing region.The highest positive correlation was recorded in the Virginia cultivar between yield and nicotine content (r = 0.50), In the Baladi cultivar, the highest positive correlation was observed between yield and protein content (r = 0.75). The strongest negative correlation between yield and NPN was found in Basma (r = −0.92), In Prilep, the highest positive correlation was between yield and chloride content (r = 0.99), whereas in Katerini, the strongest negative correlation was observed between yield and protein content (r = −0.84). The results obtained from this study, together with additional studies related to morphological characteristics, can be used for cultivar improvement programs.