Nucleic acid samples. The three nucleic acid sample types used in this study: the parental mix, F1 heterozygote, and introgression lines. (a) Representation of all chromosomes for each genetic background assayed. Red represents the W line and black represents the tester line. (b) Zoom-in of chromosome 3 for each genotype. All genes analyzed are between the genetic markers scarlet (st) and ebony (e).