Phylogenetic relationship of TAR and YUC protein sequences from grapevine and Arabidopsis . Unrooted trees of (A) TAR sequences and (B) YUC sequences were generated with the PHYLIP program  using the neighbour-joining method and a bootstrap test with 1000 iterations (bootstrap values are indicated at each node). The scale bar indicates genetic distance based on branch length. The predicted grapevine proteins are highlighted with a shaded background. Asterisks indicate grapevine sequences with EST entries in the NCBI database. At, Arabidopsis thaliana; Vv, Vitis vinifera. Accession numbers of the Arabidopsis protein sequences used in this analysis are provided in Additional file 3.