fermentation Article Application of Autochthonous Yeast Saccharomyces cerevisiae XG3 in Treixadura Wines from D.O. Ribeiro (NW Spain): Effect on Wine Aroma Pilar Blanco 1,*, María Vázquez-Alén 2, Teresa Garde-Cerdán 3 and Mar Vilanova 4 1 Estación de Viticultura e Enoloxía de Galicia (EVEGA-AGACAL), Ponte San Clodio s/n, 32428 Leiro-Ourense, Spain 2 Fundación Juana de Vega, Rúa Salvador Allende, 92, San Pedro de Nós, A Coruña, 15176 Oleiros, Spain;
[email protected] 3 Instituto de Ciencias de la Vid y del Vino (CSIC, Universidad de La Rioja, Gobierno de La Rioja). Ctra. de Burgos, Km. 6, 26007 Logroño, Spain;
[email protected] 4 Misión Biológica de Galicia (MGB-CSIC), El Palacio, Salcedo, 36143 Pontevedra, Spain;
[email protected] * Correspondence:
[email protected]; Tel.: +34-988788091 Abstract: Yeast plays an essential role in winemaking. Saccharomyces cerevisiae strains involved in fermentation determine the chemical and sensory characteristics of wines. S. cerevisiae XG3, isolated in Galicia (NW Spain), has desirable oenological potential, which has been proved at a pilot scale to produce quality wines. This study applies XG3 as active dry yeast at an industrial scale for Treixadura wine elaboration, and compares it with commercial yeast and spontaneous fermentation within three wineries included in Denomination of Origin Ribeiro over two vintages. Fermentations are monitored using conventional methods, and microbiological implantation controls are carried Citation: Blanco, P.; Vázquez-Alén, out by mtDNA-RFLPs analysis. Wine basic chemical parameters are determined using OIV official M.; Garde-Cerdán, T.; Vilanova, M. methodology, and volatile aroma compounds are determined by GC-MS.