Once medium was solidified, plates were divided into six sectors and each one of them was inoculated with 5 ll of the yeasts previously synchronized. Finally, after spending 3 days in a stove at 25 C, the color of the colonies formed by the different yeasts was visually compared. On the other hand, a fermentative method was conducted for measuring the amount of anthocyanins retained by the lees. Test tubes filled with 10 ml of fresh red must were inoculated
with 2 ml of the corresponding yeast strain, in order to get enough biomass. After fermentation, in a first step, wine was naturally separated from lees by decantation. Then, lees were washed with 1 ml of distilled water and centrifuged at 3000 rpm and 4 C for 5 min to eliminate any remnants of wine. Later, the adsorbed anthocyanins were extracted by two washes with 1 ml of formic acid/methanol (10:90 v/v) agitating with a Vortex for 30 s. Centrifugation at 3000 rpm followed each wash, and the supernatant was kept. Both wine samples and supernatants containing the adsorbed anthocyanins were analyzed by HPLC–DAD to determine the anthocyanins profile.