Authors:T. Papp, Klára Ács, Ildikó Nyilasi, Erzsébet Nagy, and Cs. Vágvölgyi
Mitchell, T. G., White, T. J., Taylor, J. W. (1992) Comparison of 5.8S ribosomalDNA sequences among the basidiomycetous yeast genera Cystofilobasidium, Filobasidium and Filobasidiella. J. Med. Vet. Mycol. 30 , 207
Authors:S. Trdan, L. Milevoj, E. Raspudic, and I. Zezlina
Saghai-Maroof, M. A., Soliman, K. M., Jorgensen, R. A. and Allard, R. W. (1984): RibosomalDNA spacer length polymorphism in barley: Mendelian inheritance, chromosomal location and population dynamics. Prot. Natl. Acad. Sci. 81, 8014
Recently, comprehensive molecular
phylogenetic analyses of ribosomal DNA sequences have led to important advances
in understanding the evolution of powdery mildew fungi (Erysiphales). These
results have triggered major changes in the identification, taxonomy, and,
thus, nomenclature of this group of plant pathogens. This paper reviews the
recent nomenclatural changes of the Erysiphales and provides an up-to-date list
of all the powdery mildew fungi reported from Hungary using the new names of
the fungal taxa.
Authors:G. Jenser, Asztéria Almási, J. Fail, and I. Tóbiás
Although Thrips tabaci is a well-known vector of Tomato spotted wilt virus (TSWV) it does not belong to the spreaders of this dangerous pathogen in North America. The possible explanation of the differences in its vector efficiency in Europe and in North America is rooted in the fact that out of the two subspecies of T. tabaci, i.e. T. tabaci tabaci and T. tabaci communis only the specimens of the latter were introduced from Europe into North America. To support our hypothesis we have used a molecular marker that detects intraspecific ribosomal DNA sequence variations between the two subspecies of T. tabaci.
In the last two decades the application of molecular techniques has had a major impact on the classification of yeasts. The nuclear DNA relatedness has become the basis of species delineation. Molecular fingerprinting methods such as analysis of restriction fragment length polymorphisms, random amplified polymorphic DNA, PCR-amplified sequences and fragments, pulsed field gel electrophoresis of chromosome DNA and others allow intraspecies differentiation and typing. The most far reaching method has been the sequencing of various parts of ribosomal DNA that has made for the first time possible to assess the phylogenetic relationships among yeasts at different taxonomic levels. Based on the molecular data obtained so far several changes have been introduced in the classification of yeasts, however, substantial restructuring of current taxonomic schemes with the consequence of numerous nomenclatural changes must await further studies.