Dominance of gene expression in F1 hybrids.

Differences in gene expression between the parental species and hybrids in hemocytes and fat body. (A) The scatter plots comparing the relative expression differences between F1 hybrids and each parental species. Each point is an immune-responsive gene (a gene that was differentially expressed after immune challenge in one or more species). The colours represent different dominance relationships. Under- and over-dominant genes have lower or higher expression in hybrids than both parental species. Additive genes have an expression level in hybrids that is intermediate between the parents. Dominant genes have expression levels that resemble one parent. Following McManus 2010 [14] and Gibson 2004 [81], expression was considered different between hybrids and the parents if it was both statistically significant (FDR2 fold difference. (B) The number of the genes in each category. (PDF)