Supplementary table 1 Measures of polymorphism in the investigated Euphydryas maturna populations. Geo. reg.: geographic region; N: sample size; nA: mean number of alleles per locus; Ar: allelic richness estimated for N=7; %Fix: proportion of fixed alleles (p=1); P95: proportion of polymorphic loci using the 0.95 criterion; Ho: mean observed frequency of heterozygotes.

Geo. reg. / N / nA / Ar / %Fix / P95 / Ho
FeO / NYÍR / 39.5 / 1.94 / 1.57 / 0.171 / 0.667 / 0.114
FeC / 20.9 / 1.72 / 1.45 / 0.290 / 0.500 / 0.086
FeB / 39.9 / 1.94 / 1.53 / 0.121 / 0.667 / 0.104
FeE / 28.9 / 2.11 / 1.64 / 0.132 / 0.722 / 0.122
GutA / 42.9 / 1.83 / 1.49 / 0.212 / 0.611 / 0.101
GutB / 46.9 / 1.89 / 1.50 / 0.206 / 0.611 / 0.123
Bat / 41.8 / 1.78 / 1.51 / 0.281 / 0.500 / 0.132
Ful / BER / 15.0 / 1.72 / 1.55 / 0.323 / 0.444 / 0.133
Lon / 28.8 / 1.94 / 1.60 / 0.200 / 0.611 / 0.144
Feh / 14.0 / 1.72 / 1.54 / 0.387 / 0.333 / 0.115
Mag / 19.3 / 1.56 / 1.40 / 0.286 / 0.556 / 0.091
Seb / KÖR / 22.6 / 1.94 / 1.57 / 0.200 / 0.611 / 0.131
Dob / 25.0 / 1.78 / 1.46 / 0.250 / 0.556 / 0.118
GyV / 45.9 / 1.78 / 1.40 / 0.281 / 0.500 / 0.099
GyK / 24.0 / 1.56 / 1.43 / 0.429 / 0.333 / 0.109
Nov / NNU / 23.0 / 1.61 / 1.44 / 0.345 / 0.444 / 0.089
Saj / 43.0 / 1.67 / 1.43 / 0.333 / 0.444 / 0.102
Gir / 32.9 / 1.67 / 1.39 / 0.300 / 0.500 / 0.097
Feld / 29.9 / 1.67 / 1.42 / 0.300 / 0.500 / 0.104
Kgy / 15.9 / 1.89 / 1.69 / 0.235 / 0.556 / 0.164
Kun / CHU / 43.0 / 2.06 / 1.65 / 0.189 / 0.611 / 0.151
Mar / BAK / 31.0 / 1.83 / 1.67 / 0.182 / 0.667 / 0.197
Ort / DRA / 22.0 / 1.78 / 1.63 / 0.219 / 0.611 / 0.184
Tor / TRY / 28.6 / 1.94 / 1.68 / 0.257 / 0.500 / 0.155
Tdh / 19.6 / 1.61 / 1.53 / 0.345 / 0.444 / 0.114
Dobr / DOB / 19.0 / 1.94 / 1.86 / 0.200 / 0.611 / 0.228

Supplementary table 2. Summary results of Structure. The K value was estimated on the basis of Evanno’s method. K: putative number of genetic clusters; Reps.: number of runs for the given K; Mean LnP(K): means of the log likelihood values for the given K over the runs; Stdev LnP(K): standard deviation of the log likelihood values for the given K over the runs; Delta K: mean(|L''(K)|) / Sd(L(K)). Bold characters indicate the K value analysed in this study.

K / Reps / Mean LnP(K) / Stdev LnP(K) / Delta K
1 / 5 / -8343.6 / 0.00 / NA
2 / 5 / -8163.9 / 5.22 / 14.71
3 / 5 / -8060.9 / 6.50 / 9.00
4 / 5 / -7899.4 / 4.68 / 25.83
5 / 5 / -7858.7 / 104.32 / 0.57
6 / 5 / -7758.5 / 7.81 / 16.01
7 / 5 / -7783.3 / 20.47 / 1.28
8 / 5 / -7781.8 / 20.57 / 0.61
9 / 5 / -7793.0 / 15.39 / 0.04
10 / 5 / -7803.4 / 21.12 / 1.77
11 / 5 / -7851.2 / 23.39 / 0.60
12 / 5 / -7885.1 / 16.08 / 0.86
13 / 5 / -7932.9 / 17.78 / 2.33
14 / 5 / -8022.1 / 21.33 / 0.52
15 / 5 / -8100.3 / 27.39 / 5.55
16 / 5 / -8330.4 / 206.29 / 0.40
17 / 5 / -8478.4 / 25.90 / 6.21
18 / 5 / -8465.4 / 91.47 / 1.18
19 / 5 / -8560.7 / 53.98 / 0.33
20 / 5 / -8638.2 / 80.48 / 0.19
21 / 5 / -8731.2 / 107.41 / 0.20
22 / 5 / -8803.0 / 87.15 / 0.83
23 / 5 / -8947.2 / 91.47 / 0.55
24 / 5 / -9041.5 / 75.44 / 0.81
25 / 5 / -9196.6 / 88.98 / 0.67
26 / 5 / -9292.3 / 154.27 / NA