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. 2019 Dec 30;12:101. doi: 10.1186/s12284-019-0362-2

Fig. 1.

Fig. 1

Grain nitrogen content (GNC), grain carbon content (GCC), and the C/N ratio of milled rice and correlations among these traits in rice subgroups. a Phenotypic distribution of the GNC, GCC, and C/N ratio in the whole population. b The GNC, GCC, and C/N ratio in five rice subgroups. Different letters above the boxplots indicate significant differences among subgroups (P < 0.05) based on Duncan’s test. c Differences in the GNC, GCC, and C/N ratio between landraces and modern varieties in the GJ and XI subgroups. *, **, and nd indicate significant differences at P < 0.05, P < 0.01, and no significant difference, respectively (Student’s t-test)