Fig. 4
From: Resequencing and genome-wide association studies of autotetraploid potato
Correlations of the agronomic traits in CIP accessions. A Representative images of potato tuber with different sizes and colors, displaying the diversity of CIP accessions. Bar = 2 cm. B Distribution and correlation analysis of yield traits showed the normal distribution of each trait and close correlations between them 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. 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 positive correlation (or negative). Rectangle highlighted by red or blue show strong positive or negative correlation, respectively. C Distribution and correlation analysis of tuber size related traits showed the normal distribution of each trait and close correlations between them evaluated by Pearson coefficient (r). Tuber size is closely related to traits including length and aspect ratio, tuber thickness and width (highlighted with red rectangle)