The objective of this research is to discuss the more complex and more utilized test to identify the cultivars of the cultivated plants. The tests were made and their characteristics were determined in order to choose the most efficient tests. the most important characteristics to take into account in order to find the most efficients test are: Identification of the variety to show if it is a pure variety and the evaluation of the characteristics stated on the comerciallabel. I include a discussion on the Characteristis above mentioned and how important is follow the legislation udes worlwide on this topic. The used most efficient test are the growth chamber and the differentelectrophoresis system.