| comparison of ribosomal dna length and restriction site polymorphisms in gremmeniella and ascocalyx isolates. | the small subunit (ssu) and the internal transcribed spacer (its) of nuclear ribosomal dna genes from 27 specimens of the fungal genera gremmeniella and ascocalyx were amplified by pcr. length polymorphisms were observed in the ssu and allowed the differentiation of four groups among the isolates tested: (i) ascocalyx abietis; (ii) gremmeniella isolates from picea spp.; (iii) gremmeniella isolates from abies balsamea; and (iv) gremmeniella isolates from abies sacchalinensis, larix spp., and pinu ... | 1994 | 7912501 |