Fig. 3
From: Genetic analysis and QTL mapping for pericarp thickness in maize (Zea mays L.)
Pearson correlation coefficients for pericarp thickness in three different environments. The diagonal line represents the frequency histogram of peel thickness. The lower left of the diagonal (lower triangle) is a scatter plot of the expression values of the two samples. The greater the slope of the red fitted curve, the stronger the correlation between the two samples. In the upper right of the diagonal (upper triangle), the numbers indicate the correlation values between the two samples and * indicates the level of significance (* P < 0.05, ** P < 0.01, *** P < 0.001). HG: Huanggang, GC: Gucheng, ZC: Zengcheng, UG: The thickness of upper germinal side of pericarp, UA: The thickness of upper abgerminal side of pericarp