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Aberrant imprinting may underlie evolution of parthenogenesis #MMPMID30006526
Kirioukhova O; Shah JN; Larsen DS; Tayyab M; Mueller NE; Govind G; Baroux C; Federer M; Gheyselinck J; Barrell PJ; Ma H; Sprunck S; Huettel B; Wallace H; Grossniklaus U; Johnston AJ
Sci Rep 2018[]; 8 (ä): ä PMID30006526show ga
Genomic imprinting confers parent-of-origin-specific gene expression, thus non-equivalent and complementary function of parental genomes. As a consequence, genomic imprinting poses an epigenetic barrier to parthenogenesis in sexual organisms. We report aberrant imprinting in Boechera, a genus in which apomicts evolved from sexuals multiple times. Maternal activation of a MADS-box gene, a homolog of which is imprinted and paternally expressed in the sexual relative Arabidopsis, is accompanied by locus-specific DNA methylation changes in apomicts where parental imprinting seems to be relaxed.