College - Author 1

College of Agriculture, Food and Environmental Sciences

Department - Author 1

Horticulture and Crop Science Department

Degree Name - Author 1

BS in Environmental Horticultural Science



Primary Advisor

Michael J. Costello


There are 43 clones of Pinot Noir currently published by the National Technical Institution for Viticultural Improvement in France (ENTAV) and over 75 selections from Foundation Plant Services (FPS) at UC Davis. Viticulturists speculate that there are anywhere from 200 – 1,000 genetic variants that may exist for any given grape variety. An important part of vineyard management is crop estimation. The purpose of this project is to see if there is correlation in the number of shoots a vine produces and the number of clusters it produces and comparing that correlation with seven different Pinot Noir clones. The clones I sampled were PN 5, 2A, 23, 115, 667, 777 and 828, and the parameters I collected data on were number of shoots and clusters for all sample vines, and the ratio of clusters/vine to shoots/vine. Clones 5 and 115 had significantly higher numbers of shoots per vine than Clone 777; Clones 5, 23 and 828 had significantly higher numbers of clusters than Clone 777; and Clones 2A, 5, 23, and 828 had significantly higher cluster/shoot ratios than Clone 115. This information could ultimately help us understand which clones produce a greater or lesser amount of clusters, shoots and clusters/shoot, which will help growers decide which Pinot Noir clones to plant.