Des pite the total amount of anthocyanins in red grape cultivars varies significantly, the relati ve content of each anthocyanin (anthocyanin profile or fingerprint) remains constant, thus it is currently accepted that the anthocyanin fingerprint of red cultivars appears to be closely related to genetic characteristics. However, current research on the general fruit composition of severa) clones of Cabernet Sauvignon, Tempranilla and Pinot noir indicates that skin anthocyanin profile is quite similar in most studied clones. We analyzed 134 Ma11Jec clones grown in the same vineyard in Agrelo (Mendoza). Clona! identity of the samples was verified by analyzing nine microsatellite markers. In order to characterize each of the 134 clones present in the studied collection we determined their anthocyanin profile by means of HPLC analysis. For each clone we determined the concentrations of delphinidin (Dp), cyanidin (Cy), petunidin (Pt), peonidin (Po) and malvidin (Mv) for their glycosylated, acetylated and cumarylated forms: Dp3Gl, Cy3Gl, Pt3Gl, Po3Gl, Mv3Gl, Dp3acGI, Cy3acGI, Pt3acGI, Po3acGI, Mv3acGI, Dp3cumGI, Cy3cumGI, Pt3cumGl, Po3cumGI y Mv3cumGI. The obtained profiles allowed clustering the clones in 1 O contrasted groups. Principal Component Analysis showed that variation in Mv and Po concentration explained about 90% ofthe variation within the clones (Mv 63.5% & Po 25.5%, respectively). Based on this information we selected two contrasted groups of clones in order to perform microarray and qRT-PCR analyses with the aim of determine the molecular mechanisms underlining the phenotypic variation within the clones.

Trabajo presentado en el IX International Symposium on Grapevine Physiology and Biotechnology, celebrado en La Serena (Chile) del 21 al 26 de abril de 2013.

Peer Reviewed