RESUMO
Identification of plant pests, in particular quarantine species, needs to be fast and accurate to enable timely plant protection measures. In addition, a false diagnosis can cause serious financial losses for trade and producers. It is now well established that genetically based diagnosis is a reliable alternative to the classical identification procedures generally based on morphological features, which usually require expert taxonomic skills. On the other hand, genetic diagnosis through the use of DNA-barcodes, i.e. stretches of DNA that contain taxon-specific information, can be performed by any skilled laboratory worker. The European Union 7th framework project QBOL aims to establish DNA-barcodes for all European quarantine organisms as well as their close relatives. The results and protocols will be disseminated in the publicly available and curated database Q-BANK. To enable genetically based identification requires knowledge of the genetic variation both within and between the species of interest as well as their close relatives. For the nematodes, several gene regions (the COI, COII, SSU, LSU and RNA polymerase subunit II) are being evaluated for their barcoding potential.
