Book Chapter Details
Mandatory Fields
Peter C. McKeown, Antoine Fort and Charles Spillane
2012 Unknown
Plant Polyploidy and Hybrid Genomics
Genomic imprinting: Parental control of gene expression in higher plants
In Press
Optional Fields
Imprinting, hybridization, epigenetics, maternal effect, endosperm, parental conflict theory
In flowering plants, insects and mammals, certain genes are uniparentally expressed due to differences in the epigenetic marks associated with the alleles inherited from the maternal and paternal germplasm. This phenomenon is known as genomic imprinting. Recent work has identified large numbers of imprinted genes from three plant species, Arabidopsis thaliana, Oryza sativa and Zea mays. This provides new opportunities for understanding the evolutionary background to imprinting. In particular, we consider the links between imprinting and hybridization between plants of different strains, species and ploidies, and possible problems associated with using hybrid crosses to identify genomic imprinting events. Finally, we consider these discussions in the light of current theories about speciation and the evolution of the plant endosperm.
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