Perturbation of Parentally Biased Gene Expression during Interspecific Hybridization

Parental gene imprinting has been postulated to play a major role in postzygotic incompatibility. What happens to imprinted genes when two different species are mated? Diana Burkart-Waco et al. describe in PLoS One how paternally expressed genes (PEG) are frequently misregulated during interspecific hybridization.

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