Erwinia psidii causes bacterial disease of guava in Brazil. Phenotypic and molecular characterization through rep-PCR fingerprinting of 42 strains from different geographical regions showed that E. psidii populations in Brazil have a low level of genetic diversity and suggest that contaminated plant material is the main source for pathogen dissemination in the country.

Of 162 multidrug-resistant Mycobacterium tuberculosis isolates from Taiwan, 60.5% were found to belong to the Beijing family on the basis of spoligotyping results. IS6110 restriction fragment length polymorphism fingerprinting showed genetic diversity among the multidrug-resistant isolates. Furthermore, 90.1% of the multidrug-resistant isolates had mutations in the rpoB gene, and 11 novel allel...

Studies of the genetic variation within populations of Coccidioides posadasii are scarce, especially for those recovered from South America. Understanding the distribution of genotypes among populations is important for epidemiological surveillance. This study evaluated the genetic diversity of 18 Brazilian strains of C. posadasii through the sequencing of the 18-28S region of nuclear rDNA, as ...

DNA fingerprinting is a powerful test for parentage and paternity testing of cattle. The mechanism of genetic identification using DNA markers is outlined with a brief description of theory and methodology and examples provided to demonstrate how it works. Theoretical expectations of the test are discussed and results obtained to date presented.

We developed 23 polymorphic microsatellite markers for the symbiotic fungi cultivated by leaf cutter ants, then assessed allelic variation in North American leafcutter-fungus populations (Mexico, Cuba, USA). Polyploidy was indicated by 21 of the 23 loci, consistent with the multinucleate nature of leafcutter fungi. Microsatellite fingerprinting can now assess fungal genetic variation within lea...

AIMS To evaluate the intraspecific diversity of the fish pathogen Flavobacterium columnare. METHODS AND RESULTS Genetic variability among Fl. columnare isolates was characterized using restriction fragment length polymorphism analysis of the 16S rDNA gene, intergenic spacer region (ISR) sequencing, and amplified fragment length polymorphism (AFLP) fingerprinting. Thirty Fl. columnare cultures...

Texas snowbells (Styrax platanifolius var. texanus) is one of the most threatened native Texas plants. A preliminary study using DNA fingerprinting (RAPDs) was performed on plants from three natural populations. Almost no genetic variation was found, either within or between these three populations. Implications for conservation are discussed. Phytologia 93(2):198-202 (August 1, 2011)

The expediency of using unique SSR DNA-markers Schizophyllum commune for population genetic assays in various fungal species has been demonstrated. In Auricularia auricula-judae and Irpex lacteus, we observed formation heterogeneous amplicons mostly up to 500 bp length that ensured their high resolution facilitated data analysis. established sets molecular markers are efficient DNA-fingerprinti...