Fig. 1

Chromosomes locations of MdHMs gene family on the apple genome. a Apple histone methyltransferase genes MdHMTs (MdSDGs and MdPRMTs) and histone demethylase genes MdHDMs (MdHMAs and MdJMJs); b Apple histone acetyltransferase genes MdHATs (MdHAGs, MdHAMs, MdHACs, and MdHAFs) and histone deacetylase genes MdHDACs (MdHDAs, MdSRTs, and MdHDTs)