Fig. 2From: Autumn migration direction of juvenile willow warblers (Phylloscopus t. trochilus and P. t. acredula) and their hybrids assessed by qPCR SNP genotypingGenetic assignments of willow warblers at sampling sites in a. Africa (November – April) and b. juveniles during autumn migration (August – October) in southern Europe. Genotypes “SS”, “HS”, “SH” were assigned as the subspecies trochilus and “NN”, “NH”, “HN” as the subspecies acredula. “HH” represents F1 hybrids and “SN/NS” F2 hybrids as verified with the other two SNPs. Three potential hybrid individuals carried conflicting genotypes for SNPs within chromosomes and are shown as “Undefined”. Sample sizes: Ivory Coast, n = 12; Cameron, n = 27; Kenya, n = 3; Tanzania, n = 4; Zambia, n = 15; South Africa, n = 8; Portugal, n = 33; Italy, n = 38; Bulgaria, n = 32Back to article page