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The number of <jats:italic>V. vinifera<\/jats:italic> varieties is estimated in about 5,000 worldwide. Single Nucleotide Polymorphisms (SNPs) represent the most basic and abundant form of genetic sequence variation, being adequate for varietal discrimination. The aim of this work was to develop DNA-based assays suitable to detect SNP variation in <jats:italic>V. vinifera<\/jats:italic>, allowing varietal discrimination. Genotyping by sequencing allowed the detection of eleven SNPs on two genes of the anthocyanin pathway, the flavanone 3-hydroxylase (<jats:italic>F3H<\/jats:italic>, EC: 1.14.11.9), and the leucoanthocyanidin dioxygenase (<jats:italic>LDOX<\/jats:italic>, EC 1.14.11.19; synonym anthocyanidin synthase, <jats:italic>ANS<\/jats:italic>) in twenty <jats:italic>V. vinifera<\/jats:italic> varieties. Three High Resolution Melting (HRM) assays were designed based on the sequencing information, discriminating five of the 20 varieties: <jats:italic>Alicante Bouschet, Donzelinho Tinto, Merlot, Moscatel Galego and Tinta Roriz<\/jats:italic>. Sanger sequencing of the HRM assay products confirmed the HRM profiles. Three probes, with different lengths and sequences, were used as bio-recognition elements in an optical biosensor platform based on a long period grating (LPG) fiber optic sensor. The label free platform detected a difference of a single SNP using genomic DNA samples. The two different platforms were successfully applied for grapevine varietal identification.<\/jats:p>","DOI":"10.1038\/s41598-018-24158-9","type":"journal-article","created":{"date-parts":[[2018,4,11]],"date-time":"2018-04-11T15:00:26Z","timestamp":1523458826000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":26,"title":["Alternative SNP detection platforms, HRM and biosensors, for varietal identification in Vitis vinifera L. using F3H and LDOX genes"],"prefix":"10.1038","volume":"8","author":[{"given":"S\u00f3nia","family":"Gomes","sequence":"first","affiliation":[]},{"given":"Cl\u00e1udia","family":"Castro","sequence":"additional","affiliation":[]},{"given":"Sara","family":"Barrias","sequence":"additional","affiliation":[]},{"given":"Leonor","family":"Pereira","sequence":"additional","affiliation":[]},{"given":"Pedro","family":"Jorge","sequence":"additional","affiliation":[]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3300-2606","authenticated-orcid":false,"given":"Jos\u00e9 R.","family":"Fernandes","sequence":"additional","affiliation":[]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8229-0117","authenticated-orcid":false,"given":"Paula","family":"Martins-Lopes","sequence":"additional","affiliation":[]}],"member":"297","published-online":{"date-parts":[[2018,4,11]]},"reference":[{"key":"24158_CR1","doi-asserted-by":"crossref","unstructured":"Bouquet, A. 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