All of the carbapenem-resistant Escherichia coli (CREC) isolates identified in our hospital from 2005 to 2008 (n = 10) were studied. CREC isolates were multidrug resistant, all carried bla(KPC-2), and six of them were also extended-spectrum beta-lactamase producers. Pulsed-field gel electrophoresis indicated six genetic clones; within the same clone, similar transferable bla(KPC-2)-containing p...

Mating studies were conducted on 78 isolates of Fusarium species section Liseola from rice, sugarcane and maize. From the crosses with tester strains of Gibberella fujikuroi species complex, 64.1% (50 out of 78 isolates) were cross-fertile with tester strains of mating populations A to E. The results of the mating studies showed that of the 50 isolates, 19 belonged to mating population A (Gibbe...

Progeny from single females of four known races of Heterodera glycines Ichinohe were used to establish relatively uniform populations. Single females from these populations were mated with males of other races in all possible combinations to study compatibility and inheritance patterns. When race 1 or 3 was crossed with either race 2 or 4, there was a significant reduction in number of females ...

Drought and low nitrogen are major stresses for maize (Zea mays L.), populations from the Sahara Desert potential sources of stress tolerance. The objectives were to assess tolerance varietal heterosis effects Algerian under no-nitrogen fertilization water stress. A diallel among six population was evaluated drought (300 mm irrigation) vs. control (600 mm) 120 kh ha?1 N fertilization. Genotypes...

Deladenus siricidicola is a principal biological control agent used to suppress populations of the globally invasive pine pest, woodwasp Sirex noctilio. Previous studies have reported low genetic diversity in D. programs Southern Hemisphere and identified two additional, distinct lineages North America Spain. In this study, we tested ability these three interbreed produce viable offspring. We m...