Fig. 2

Pearson correlation analysis of nine N tolerance-related traits (HLW, LLW, LWR, HRW, LRW, RWR, HRSR, LRSR, RSRR). The upper part of the figure is a significant test label by One-way ANOVA test. *, the difference significance at the 0.05 level. **, the difference significance at the 0.01 level. The lower part is the correlation coefficient between each trait.