"José is frustrated by some Italian professors who talk about ‘polyclonal’ varieties, such as Sangiovese. ‘You can’t have one variety coming from different seeds. There are no polyclonal varieties. If you multiply any grape by seeds you get a different variety. Most of the time this is the result of self-fertilization, and it produces a different variety,’ he explains. In Italy in some vineyards they have Sangiovese grown from seed and call it Sangiovese. It’s not: it’s a different variety".
"José Vouillamoz on grape varieties, at MUST 2017", di Jamie Goode.
Il contributo di José Vouillamoz alla ricerca basata sui marcatori del DNA delle varietà di vite è stato determinante per cominciare a creare veri e propri alberi genealogici delle varietà di vitis vinifera, oltre a svelare le origini reali di molte varietà europee. Per esempio il Sangiovese:
"What about Sangiovese? Its parentage was a mystery for a long time. People thought it was either a child of Ciliegiolo or a parent of Ciliegiolo. José found that Ciliegiolo was actually one of its parents, and then went looking for the other one. It turns out to be Calabrese de Montenuova, an obscure variety that was rescued in the gulf of Naples from the bank of Lago d’Averno. So for the Tuscans, it was a big shock to find out that their beloved Sangiovese was half Calabrian".