Four-taxon D-statistic test for introgression between Diapensia purpurea and D. himalaica.

P1, P2 and P3: him1: D. himalaica 55962, him2: D. himalaica 55969, him3: D. himalaica 55976, pur1: D. purpurea 56014, pur2: D. purpurea 56025, pur3: D. purpurea 56031 (sample IDs refer to Table 1); O: outgroup ‘A’ consists of all individuals from the two arctic species D. lapponica and D. obovata. D-statistic values (D) and their standard deviation (Std(D)) are given for each test. ABBA, BABA: the number of alleles that support each pattern (the fractions are due to heterozygosity). No. loci: the number of loci analyzed in each test; pdisc: the percentage of discordance.*Z-scores that are statistically significant after conversion to a two-tailed P-value and using α = 0.01 as a conservative cutoff for significance.Four-taxon D-statistic test for introgression between Diapensia purpurea and D. himalaica.