highly significantP < 10 − 10
With weak ( m = 10 − 8 ) or strong introgression ( m = 10 − 7 ), on the other hand, the D -statistic was in the ranges of 0.04–0.31 and 0.33–0.73, respectively, and in all cases highly significant ( P < 10 − 10 ) ( Fig. 2b,c ).