Candidate imprinted gene homologs in rice and Arabidopsis may have roles in epigenetic regulation.1,2

1: Imprinting has not been experimentally tested.2: Imprinting has been experimentally verified.3: p is paternally biased gene expression.4: m is maternally biased gene expression.5: Hypothesized to be transcripts deposited or transferred to the endosperm of Arabidopsis from maternal seed tissues [28].