In teleosts, the study of
zebrafish showed that the methylation in early development and
demethylated during zygotic cleavage stages of several genes were essential
events for reprogramming the maternal zebrafish genome
(Potok et al., 2013). In tilapia GH, GHR1 and GHR2 promoters, the CpG
sites supported the hypothesis that their differential methylation levels
may influence expression of transcripts