Table 1. Embryonic expression and parent-of-origin expression of the confirmed MEGs and the PEG in other studies.

	Embryo expression1		Parent-of-origin of transcripts
Gene	4 cell	globular	1–32 cell2	torpedo3
AT1G29660	YES	YES	biallelic	Ler bias
AT1G72260	YES	YES	maternal	maternal
AT2G47115	NO	NO	maternal	not expressed
AT5G62210	YES	YES	maternal	biallelic
AT3G20520	NO	NO	maternal	maternal bias
AT2G17710	YES	YES	biallelic	maternal bias
AT3G21500	YES	YES	maternal	maternal
AT2G01520	YES	YES	maternal bias	maternal
AT1G20680	NO	NO	maternal	maternal
AT5G51950	YES	YES	maternal bias	maternal
AT1G29050	YES	YES	no SNPs covered	maternal bias
AT3G26790	YES	YES	early PEG	biallelic

¹: The embryonic expression of the 11 MEGs and the PEG assayed by Xiang and colleagues [45] at the 4 cell and the globular stage are displayed. Detailed expression scores can be found in Table S3.

²: The parent-of-origin-dependent expression of the 11 MEGs and the PEG in early embryos (1–32cell) of reciprocal crosses between Col-0 and Cvi [34] is shown. Detailed read counts can be found in Table S4.

³: The parent-of-origin-dependent expression of the 11 MEGs and the PEG in late embryos (torpedo stage) of reciprocal crosses between Col-0 and Ler [28] is shown. Detailed read counts can be found in Table S4.