A French term. The process of Sélection Massale or Mass Selection in English requires a vigneron to know their vineyard intimately, to walk it, and, select individual vines to take cuttings from to grow new vines from. They select the best vines eliminating the poorest. Grapevines are easily propagated using cuttings. Depending on how the vineyard was established there may be a diversity of genetic material in the vineyard or simply a single a clone. Clones of different grape varieties are propagated from the one single parent vine, hence the term clone. Where there is a diversity of genetic material Sélection Massale can help maintain diversity compared to the planting of a single clone.