Figure 3
Forecrown colour, represented by dot colour (scale: red-reddish-orange-amber-yellow) in relation to hybrid index on a scale from 0 (P. p. pusillus genotype) to 1 (P. c. extonigenotype), and A) genotype of an indel linked to CYP2J19 on scaffold 50201 on chromosome 8, and B) interspecific heterozygosity. While non hybrids homozygous for their respective allele are characterised by species-specific forecrown colour, individuals heterozygous at the CYP2J19 -linked SNP have orange to red forecrowns, even in extoni genotypes with little admixture evident. Backcrosses are mostly into extoni .