Bisulfite-seq of the Solanum lycopersicum sulfurea paramutation in the cmt3 mutant background and upon reintroduction of WT CMT3. Bisulfite-seq of the Solanum lycopersicum sulfurea paramutation in the cmt3 mutant background and upon reintroduction of WT CMT3

Whole genome bisulfite sequencing was done in F3 plants resulting from a cross between Solanum lycopersicum plants bearing the sulfurea epiallele and cmt3 mutants. 6 F3 plants were sequenced: 3 WT and 3 cmt3. The F3 WT plants had methylation levels (quantified with McrBC-qPCR) consistent with the TAB2sulf epiallele and the cmt3 plants had methylation levels consistent with TAB2+ (low DNA methylation). cmt3 mutants from the F2 generation were backcrossed with WT cv M82 plants to restore CMT3 activity and followed for 2 generations (BC2). 4 BC2 plants were sequenced 2 WT and 2 cmt3. The aim of the experiment was to compare DNA methylation levels in all contexts between cmt3 and WT F3 plants with particular interest on SlTAB2 (Solyc02g005200) which has been previously associated with paramutation in the sulfurea background. The stability of DNA methylation upon CMT3 reintroduction was assessed in the BC2 plants. WT cv M82, cmt3 and sulfurea controls were added in single replicates.