Fig. 2: Correlation analysis for agronomic and nutrition traits in Wag18.

Correlation coefficients were derived by Pearson correlation analysis and are presented in each box. Colour intensity indicates the strength of correlation, with deeper red representing a stronger positive relationship. The diagonal is the label for each phenotype. BSCW Bundle Sheath Cell Width. Significance is shown as *** \({\boldsymbol{p}}{\boldsymbol{ < }}{\boldsymbol{0}}{\boldsymbol{.}}{\boldsymbol{001}}\); ** \({\boldsymbol{p}}{\boldsymbol{ < }}{\boldsymbol{0}}{\boldsymbol{.}}{\boldsymbol{01}}\); *\({\boldsymbol{p}}{\boldsymbol{ < }}{\boldsymbol{0}}{\boldsymbol{.}}{\boldsymbol{05}}\).