“…Previously, we tried to evaluate the use of PCR-DGGE for nematode community analysis, by comparing the resulting band patterns of DNA fragments with the results of morphological analyses of the nematode samples isolated from the field. We found that the correlation in similarity relationships among communities, i.e., dissimilarity matrices, between the two methods was significant, but not high (r = 0.400 0.603, Okada and Oba, 2008). One of the reasons might be that a single morphological taxon, representing a family in our study, produced two or more DNA bands.…”