Although the analysis of length polymorphism at STR loci has become a method of choice for grape cultivar identification, the standardization of methods for this purpose lags behind that of methods for DNA profiling in human and animal forensic genetics. The aim of this study was thus to design and validate a grapevine STR protocol with a practically useful level of multiplexing. Using free bioinformatics tools, published primer sequences, and nucleotide databases, we constructed and optimized a primer set for the simultaneous analysis of six STR loci (VVIi51, scu08vv, scu05vv, VVMD17, VrZAG47, and VrZAG83) by multiplex PCR and CE with laser-induced fluorescence, and tested it on 90 grape cultivars. The new protocol requires subnanogram quantities of the DNA template and enables automated, high-throughput genetic analysis with reasonable discriminatory power. As such, it represents a step toward further standardization of grape DNA profiling.

Centre of the Region Haná for Biotechnological and Agricultural Research Faculty of Science Palacky University Olomouc Czech Republic

Department of Biochemistry Palacký University Olomouc Czech Republic

Department of Photochemistry and Molecular Science Uppsala University Uppsala Sweden

Department of Viticulture and Enology Mendel University Brno Czech Republic

Institute of Analytical Chemistry of the ASCR Brno Czech Republic

Institute of Biotechnology LUKE BI Plant Genome Dynamics University of Helsinki Helsinki Finland

Institute of Molecular and Translational Medicine Faculty of Medicine and Dentistry Palacký University Olomouc Czech Republic

RSE National Center for Biotechnology under the Science Committee Ministry of Education and Science of the Republic of Kazakhstan Astana Kazakhstan

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