The group of variants analysed by MSAP.

<p>The system used to identify individual variants in <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0126638#pone.0126638.t001" target="_blank">Table 1</a> is as follows: the cultivar abbreviation (MT = Müller Thurgau or R = Riesling) is followed by identification number of the cutting. Meaning of the suffixes: M-NI = maternal, non-infected plants; M-I = maternal, GFLV-infected plants; IV-NI = <i>in vitro</i> cultivated, non-infected plants; IV-I = <i>in vitro</i> cultivated, infected plants; TIV-NI = <i>in vitro</i> thermotherapy, non-infected plants; and TIV-HAI = <i>in vitro</i> thermotherapy, plants healed after GFLV infection. The notes “(1 year)” and “(8 weeks)” indicate the time interval elapsed since the transfer of plants from <i>in vitro</i> to non-sterile conditions.</p><p>The group of variants analysed by MSAP.</p

Comparison of average mutual epigenetic similarities between groups represented by individuals with the same attributes (time elapsed since exposure to stress and the nature of conditions during <i>in vitro</i> cultivation).

<p>The first column clearly shows a decreasing tendency of similarity of DNA methylation landscape, when compared with state in maternal plants. It is also noticeable that the most similar DNA methylation states for each group of variants were usually recorded when individuals from the same group were compared (i.e., values on the diagonal of <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0126638#pone.0126638.t002" target="_blank">Table 2</a>).</p><p>Comparison of average mutual epigenetic similarities between groups represented by individuals with the same attributes (time elapsed since exposure to stress and the nature of conditions during <i>in vitro</i> cultivation).</p