Fig. 7From: Hybrid origin of European Vipers (Vipera magnifica and Vipera orlovi) from the Caucasus determined using genomic scale DNA markersVarious arrangements of taxa used for ABBA/BABA tests to calculate D-statistics. Gene flow from the P3 group (V. renardi in all cases) into the P2 group is expected to increase the number of sites displaying the ABBA pattern relative to the BABA pattern, pushing the D statistic toward 1Back to article page