Fig. 5
From: Resequencing and genome-wide association studies of autotetraploid potato
Distributions and correlations of quality traits in CIP accessions. Distribution and correlation analysis of quality traits particularly various sugar contents showed the normal distribution of each trait. Correlations between different traits are evaluated by Pearson factor (r). The lower left corner is the dot graph of two traits, and upper right corner is the Pearson coefficient between them. There is completely negative correlation between contents of amylose and contents of amylopectin (highlighted by blue rectangle) and strong positive correlation between the content of glucose and sucrose (highlighted by red rectangle). For Pearson factor (r), r = 0, 1 or − 1 means completely irrelevant, completely positive or negative correlation, respectively. The closer to 1 (or − 1), the stronger the correlation (or negative correlation)