MOLECULAR PHYLOGENY OF THE NUCLEAR 5.8S RIBOSOMAL-RNA GENES IN 37 SPECIES OF NICOTIANA GENUS

The primary structure of the 5.8S rRNA gene was established in 37 spec ies of the genus Nicotiana representing four different sections of the subgenus Petuniodes: Acuminatae, Alatae, Noctiflorae, and Suaveolente s. On the basis of these data, phylogenetic analysis was performed. Th e obtained results are in good agreement with the modem systematics of the genus. However, the bootstrap analysis gaves only poor statistica l support for the branches of the phylogenetic tree owing to a small n umber of phylogenetically informative positions.