engleski

Major morphological properties of the leaf of some burley tobacco genotypes

Due to a number of problems relating to the production of burley tobacco, the Tobacco Institute Zagreb has recently included creation of new cultivars of this tobacco type into its overall tobacco production programme. Some of its major morphological properties are being investigated. Thus, two-year investigations of certain important morphological properties of tobacco leaf have been carried out with four cultivars and five F1 hybrids on the experimental field at Božjakovina. The results obtained show that the genotypes under study were significantly different as regards the investigated morphological properties of the leaf. The highest increase in leaf number was achived in the period from the end of June to the middle of July. All genotypes had a satisfactory number of leaves, except for the line cultivar Hy 71, as well as thickness and were, thus, classified as thin-bodied tobaccoes. As for leaf weight, the best results were obtained with the F1 hybrids Poseydon x BA1, Poseydon x TN 86 and Hy 71 BA1. A slightly flatter leaf angle was determined for the line cultivar Poseydon and the standard cultivar Čulinec. There was a high incidence of TMV infection in all cultivars in both years of investigation. The line cultivar Poseydon was highly susceptible to PVY.

Burley tobacco; Genotype; Leaf morphological properties; TMV and PVY infection

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