2.4. Sequence analyses
Sequence data were compiled using Seqaid Version 3.6 (Rhoads and Roufa, 1985). Multiple sequence alignments were made using Clustal W (Thompson et al., 1994). Phylogenetic tree was constructed by Neighborhood Joining Bootstrap method (Bootstrap analysis with 1000 replicates) in Clustal X (1.81) and rooted tree was generated using TREEVIEW software (Win 32) (Page, 1996). The 16S rDNA nucleotide sequences of other phytoplasma isolates used for comparison (Table 1) were obtained from GenBank (Benson et al., 1999). The BLAST programme (Altschul et al., 1997) was used to identify related sequences available from the GenBank database.