Impact of Cluster Thinning on Wine Grape Yield and Fruit Composition: A Review and Meta-Analysis

Figure 5

(a) PCA displaying the relationships between categorical variables and the percent change of the dependent variables in response to CT. (b) PCA variables visualizing the relationships between categorical and the % change of dependent variables in CT compared to CN. The influence of (c) genotype and (d) rootstock on the difference in TSS between control (CN) and cluster thinning (CT) treatments. In (a, b), data on total anthocyanin and total phenolics were excluded due to the lack of data points. In (c, d), the numbers in parentheses represent the number of observations (n) provided for each rootstock or genotype; genotypes or rootstocks with less than three observations were emitted. GDD, growing degree days; TSS, total soluble solids; TA, titratable acidity; LA : Y, leaf area-to-yield ratio; and BW, berry weight.

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