Candidate imprinted gene homologs in rice and <i>Arabidopsis</i> 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].