Project description:We quantified genome-wide total and allele-specific expression in two non-social parasitoids wasp species Nasonia vitripennis and Nasonia giraulti and their reciprocal F1 hybrids. No parent-of-origin effect in allelic expression was found for >8,000 informative genes, suggesting lack of genomic imprinting in adult Nasonia. Gene expression divergence between Nv and Ng could be attributed to both significant cis- and trans- regulatory changes during evolution.