Divergence among rice cultivars reveals roles for transposition and epimutation in ongoing evolution of genomic imprinting.

ABSTRACT: Parent-of-origin-dependent gene expression in mammals and flowering plants results from differing chromatin imprints (genomic imprinting) between maternally and paternally inherited alleles. Imprinted gene expression in the endosperm of seeds is associated with localized hypomethylation of maternally but not paternally inherited DNA, with certain small RNAs also displaying parent-of-origin-specific expression. To understand the evolution of imprinting mechanisms in Oryza sativa (rice), we analyzed imprinting divergence among four cultivars that span both japonica and indica subspecies: Nipponbare, Kitaake, 93-11, and IR64. Most imprinted genes are imprinted across cultivars and enriched for functions in chromatin and transcriptional regulation, development, and signali

SUBMITTER: Rodrigues JA 

PROVIDER: S-EPMC8307775 | biostudies-literature | 2021 Jul

REPOSITORIES: biostudies-literature