Figure 2. Association among eight parental lines and 45 hybrids of Brassica with respect to alterations in differentially methylated sites between seedlings and buds as revealed by principal component analysis.

Intraspecific hybrids, B. rapa × B. rapa and B. napus × B. napus, are represented by closed triangles and closed circles in light grey, respectively. Interspecific hybrids, B. napus ×B. rapa and B. rapa × B. napus are represented by rhombuses in light grey and open rhombuses, respectively. Parental lines of B. napus and B. rapa are represented by open triangles and circles, respectively.