About chromation state:

We collected 15 Wheat epigenomic datasets, including ChIP-seq, DNase-seq. A Hidden Markov Model was applied to aggregate or collapse the multi-dimensional matrices into a small number of chromatin states. We identified 15 chromatin states located in 1,714,604 segments across the whole genome and different chromatin states contained different epigenetic features.

After chromatin state partition, we employed self-organization mapping (SOM) to integrate, visualize, and mine diverse epigenomic datasets, including 1350 units that contained different chromatin signatures.