L. Albanna et al., PHYLOGENETIC ANALYSIS OF NEMATODES OF THE GENUS PRATYLENCHUS USING NUCLEAR 26S RDNA, Molecular phylogenetics and evolution, 7(1), 1997, pp. 94-102
We used nucleotide sequences of the large subunit ribosomal genes (265
rDNA) to examine evolutionary relationships among species of the genu
s Pratylenchus (Order: Tylenchida, Family: Pratylenchidae), commonly k
nown as root-lesion nematodes, Ten species of Pratylenchus were studie
d including, P. penetrans, P. crenatus, P. minyus, P. vulnus, P. thorn
ei, P. musicola, P. coffeae, P. hexincisus, P. scribneri, and P. brach
yurus. The species Hirschmanniella belli, Meloidogyne javanica, Hetero
rhabditis bacteriophora, Nacobbus aberrans, Radopholus similis, and Xi
phinema index were used as outgroups. Based on parsimony analyses of a
pproximately 307 aligned nucleotides of the D3 expansion region of the
26S rDNA, it is clear that species of Pratylenchus are a paraphyletic
assemblage. The outgroup taxon H. belli shares a common ancestor with
the clade that includes P. vulnus and P. crenatus while N. aberrans a
nd R. similis share a common ancestor with 5 other species included in
this study. (C) 1997 Academic Press.