Fig. 13From: Quantitative phenotyping and evaluation for lettuce leaves of multiple semantic componentsThe principal components and correlation analysis of four types of traits. A Screen plot of the PCA model and the curves of cumulative explained variance. B Hierarchically-clustered heatmap for the correlation matrix of 40 PCs. C The correlation analysis for four types of PCs. Correlation coefficients less than 0.01 were not displayedBack to article page