Phylogenetic analysis. The rDNA ITS gene sequences
were compared by BLAST search with the sequences
available in the GenBank database. Sequences generated
from materials in this study and retrieved from GenBank
were initially aligned using the program CLUSTAL X
(Thompson et al., 1997), and then the alignment was
refined manually using the PHYDIT program version 3.2
(Chun, 1995; available at http://plaza.snu.ac.kr/jchun/phydit).
A neighbor-joining tree was constructed with Kimura’s 2-
parameter distance model (Kimura, 1980) using the PHYLIP
3.57c package (Felsenstein, 1985). The bootstrap analysis
using 1000 replications were performed to assess the
relative stability of the branches