Abstract
The certification of olive oil has led to the definition of Protected Denomination of Origin (PDO) producing regions in European countries. PDO products should be protected, and a solution could be by using DNA fingerprinting. In this work we evaluate the efficiency of RAPD, ISSR, and SSR molecular markers for olive oil varietal identification and their possible use in certification purposes. Twenty-three Portuguese olive oil samples (11 obtained monovarietal and 12 purchased commercial oils) were screened by means of two RAPD, four ISSR, and four SSR markers. The quality of amplified products was used to evaluate the reproducibility and the level of polymorphism. Principal component analysis was performed with DCENTER using unweighted pair group mathematical average (UPGMA) that allowed group formation according to olive oil varietal geographic origin.
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