Fig. 2.

Allele distribution in F₁ hybrid genetic background. The x-axis is the log₂ ratio of the number of reads carrying the X. maculatus allele vs. the number of reads carrying the X. hellerii allele. A value of zero indicates an equal distribution of the two alleles while a positive value indicates stronger X. maculatus allele expression than the X. hellerii allele; the reverse balance in expression is indicated by a negative value. (A) F₁ hybrid reads are mapped to only X. maculatus reference transcriptome. (B) F₁ hybrid reads are mapped to X. maculatus and in silico X. hellerii transcriptomes allowing five mismatches. (C) F₁ hybrid reads are mapped to de novo fused assemblies of both X. maculatus and X. hellerii transcriptomes allowing no mismatches.