Abstract
Abstract Two species-specific PCR primer pairs were developed for identifying the two nematode species, Bursaphelenchus xylophilus and B. mucronatus. The primer pairs were developed from the sequence of ribosomal DNA (rDNA) repeats to produce DNA fragments of different lengths by PCR amplification. The DNA fragments for B. mucronatus and B. xylophilus were 210 bp and 557 bp, respectively. When mixed, neither primer pair inhibited the PCR amplification of the other. Five isolates of B. xylophilus and four isolates of B. mucronatus showed different band profiles of PCR products between the two species, but identical profiles among isolates of the same species.
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