Site by site DNA methylation variation between vernalized and non-vernalized plants. A. Fragment 6.8 k (a). B. Fragment 7.6 k. Stars highlight statistical significance of methylation variation induced by vernalization treatment, with **p < 0.01 and ***p < 0.001. Red, blue and green colors represent CG, CHG and CHH contexts, respectively. Faint and strong colors represent non-vernalized and vernalized plants respectively.