Fig. 3
From: Genomics of hybrid parallel origin in Aquilegia ecalcarata
Genetic introgression inference. (a-d) Analysis of ABBA-BABA. A non-zero D statistic reflects an asymmetric pattern of allele sharing, implying gene flow. Z value and p value reflect the significance of the test. An absolute value of the Z score above 3 is often used as a critical value