The American scientist Carole P. Meredith has been at the United States since 1980 University of California working in Davis. There she taught as a professor of viticulture and cellar economy and was intensively involved with ampelography Busy tasks. From the mid-1990s on, it made great efforts to determine the origin of grape varieties DNA analysis, There was close cooperation with the French research institute Montpellier especially with the Swiss Ampelographen Jean-Michel Boursiquot, Among other things, the descent of the varieties Cabernet Sauvignon. Carmenère. Charbono. Chardonnay. Durif. Gamay. Merlot. Merlot Blanc. Plavac Mali. Syrah and Zinfandel (or that this is identical to Primitivo and Tribidrag is), as well as of over 20 intersections Gouais blanc x Pinot clarified.
Carole Meredith retired in 2003. Since then, she has been producing together with her husband Stephen Lagier at the Lagier-Meredith winery in California Napa Valley (Mount Veeder) Syrah wines. Often, in connection with grapevine DNA analyzes, their name is also stated in relevant sources after their retirement. However, this does not refer to a personal contribution, but that their work was included in the analysis until 2003. In 2009 she was inducted into the "Vintners Hall of Fame" for her great service to the Californian wine industry.