ABSTRACT Brazil is the largest exporter of chicken meat and poultry farming one most important productive segments, despite major losses due to bacterium Escherichia coli, which also a zoonotic microorganism. The objetive this study was isolate E. coli evaluate its transmissibility potential from field using Pulsed Field Gel Electrophoresis (PFGE) technique. Environmental samples (poultry litte...

genetic diversity is one of principle factors to succeed in breeding programs, so its determination is vital in the using of plant genetic resources. with the aim of evaluation of genetic diversity among safflower landraces, 20 lines (14 iranian and 6 foreign lines) were studied for phenotypic and genotypic variations using agro-morphological traits and rapd markers. field study was conducted i...