1 Journal of Biogeography SUPPORTING INFORMATION The dissection of a Pleistocene refugium: phylogeography of the smooth newt, Lissotriton vulgaris, in the Balkans Maciej Pabijan, Piotr Zieliński, Katarzyna Dudek, Marta Chloupek, Konstantinos Sotiropoulos, Marcin Liana and Wiesław Babik Appendix S1 PCR and sequencing methods, primer sequences, GenBank accession numbers and maximum likelihood tree for ND2 sequences in Lissotriton vulgaris. DNA extraction, PCR and sequencing DNA from alcohol-preserved tissues of smooth newts (Lissotriton vulgaris) was extracted using the Wizard Genomic DNA Purification kit (Promega, Madison, WI, USA). We amplified and sequenced two mitochondrial DNA (mtDNA) fragments. For all samples, a c. 1145 bp fragment consisting of the tRNA-Met, NADH dehydrogenase subunit 2, tRNA-Trp and tRNA-Ala (ND2) was obtained. For a subset of samples (14 individuals), we also obtained the 3′ portion of the gene encoding NADH dehydrogenase subunit 4, the entire tRNA-His gene, and part of tRNA-Ser (ND4). PCRs were conducted using the ND4/Leu primer pair (Arévalo et al., 1994) or, in the case of unsatisfactory amplification products, we applied the alternative pair ND4-deg/Leu_MP. Twenty microlitre PCRs contained 2 µL of 10× PCR buffer with (NH4)2SO4 (Thermo Fisher Scientific, Waltham, MA, USA), 2.5 mM MgCl2, 1µM of the forward and reverse primers, 0.2 mM of each dNTP, and 0.5 U of Taq polymerase (Thermo Fisher Scientific, Waltham, MA, USA). The cycling scheme included initial denaturation at 94 °C for 3 min 30 s, followed by 35–40 cycles at 94 °C for 30 s, 54–56 °C for 30 s, 72 °C for 1 min 20 s, and a final elongation step at 72 °C for 3 min. Exonuclease I/ alkaline phosphatase (Thermo Fisher Scientific, Waltham, MA, USA) digestion was used to purify the PCR products. Sequencing reactions were based on BigDye v3.1 Terminator Cycle Sequencing chemistry (Applied Biosystems, Foster City, CA, USA) using the PCR primers and additional sequencing primers. After EDTA/ethanol precipitation, the sequencing products were run an ABI 3130xl Genetic Analyzer (Applied Biosystems, Foster City, CA, USA). 2 Table S1 Primers used for amplification and sequencing of the ND2 and ND4 genes in Lissotriton. Gene Primer Sequence (5′–3′) Application Reference ND2 H5018 TCTGGGTTGCATTCAGAAGA amplification Arévalo et al. (1994) ND2 L3879 TGTTGGTGGAAACCCTTCTC amplification, this study sequencing ND2 ND2 seq3 GGGCTyCCGCCAACATGTGG sequencing this study ND2 ND2 seq6 GGCCCTTGGTCTTGyTATCC sequencing this study ND4 ND4 CACCTATGACTACCAAAAGCTCATGTAGAAGC amplification, Arévalo et al. (1994) sequencing ND4 Leu CATTACTTTTACTTGGATTTGCACCA amplification, Arévalo et al. (1994) sequencing ND4 ND4_deg CACCTATGAYTACCAAAAGCYCATGTAGAAGC amplification, this study sequencing ND4 Leu_MP CATAACTTTTACTTGGAGTTGCACCA amplification, this study sequencing ND4 ND4_seq1 AAATTATACGCACATGAGAAGG sequencing this study ND4 ND4_seq2 CAAACACCATGAAGCCTTACAG sequencing this study 3 Table S2 GenBank accession numbers, haplotypes and gene annotations of ND2 and ND4 sequences from smooth newts (Lissotriton sp.) and alpine newts (Mesotriton alpestris, used as an outgroup) from previous studies (Babik et al., 2005; Pabijan et al., 2006) applied in different analyses (see main text). Analysis Accession Haplotype Gene annotation ND2; ND2+ND4 AY951351 A1 Triturus_vulgaris_haplotype_A1_NADH_dehydrogenase_subunit_2_(ND2) ND2; ND2+ND4 AY951403 A4 Triturus_vulgaris_haplotype_A4_NADH_dehydrogenase_subunit_2_(ND2) ND2; ND2+ND4 AY951342 B1 Triturus_vulgaris_haplotype_B1_NADH_dehydrogenase_subunit_2_(ND2) ND2; ND2+ND4 AY951493 C1 Triturus_vulgaris_haplotype_C1_NADH_dehydrogenase_subunit_2_(ND2) ND2; ND2+ND4 AY951501 D1 Triturus_vulgaris_haplotype_D1_NADH_dehydrogenase_subunit_2_(ND2) ND2; ND2+ND4 AY951402 E1 Triturus_vulgaris_haplotype_E1_NADH_dehydrogenase_subunit_2_(ND2) ND2; ND2+ND4 AY951390 F1 Triturus_vulgaris_haplotype_F1_NADH_dehydrogenase_subunit_2_(ND2) ND2; ND2+ND4 AY951349 G1 Triturus_montandoni_haplotype_G1_NADH_dehydrogenase_subunit_2_(ND2) ND2; ND2+ND4 AY951454 H1 Triturus_vulgaris_haplotype_H1_NADH_dehydrogenase_subunit_2_(ND2) ND2; ND2+ND4 AY951492 I1 Triturus_montandoni_haplotype_I1_NADH_dehydrogenase_subunit_2_(ND2) ND2; ND2+ND4 AY951500 J1 Triturus_vulgaris_haplotype_J1_NADH_dehydrogenase_subunit_2_(ND2) ND2; ND2+ND4 AY951343 K1 Triturus_vulgaris_haplotype_K1_NADH_dehydrogenase_subunit_2_(ND2) ND2; ND2+ND4 AY951471 L1 Triturus_vulgaris_haplotype_L1_NADH_dehydrogenase_subunit_2_(ND2) ND2; ND2+ND4 AY951347 L24 Triturus_vulgaris_haplotype_L24_NADH_dehydrogenase_subunit_2_(ND2) ND2; ND2+ND4 AY951396 L57 Triturus_vulgaris_haplotype_L57_NADH_dehydrogenase_subunit_2_(ND2) ND2; ND2+ND4 AY951502 L. italicus Triturus_italicus_NADH_dehydrogenase_subunit_2_(ND2) ND2; ND2+ND4 AY951506 L.boscai Tb2 Triturus_boscai_haplotype_Tb2_NADH_dehydrogenase_subunit_2_(ND2) ND2; ND2+ND4 AY951507 L.boscai Tb3 Triturus_boscai_haplotype_Tb3_NADH_dehydrogenase_subunit_2_(ND2) ND2; ND2+ND4 AY951505 L.boscai Tb1 Triturus_boscai_haplotype_Tb1_NADH_dehydrogenase_subunit_2_(ND2) ND2; ND2+ND4 AY951503 L.helveticus Th1 Triturus_helveticus_haplotype_Th1_NADH_dehydrogenase_subunit_2_(ND2) ND2; ND2+ND4 DQ282140 M. alpestris hap1 Triturus_alpestris_haplotype_hap1_NADH_dehydrogenase_subunit_2_(ND2) ND2; ND2+ND4 DQ282138 M. alpestris hapA Triturus_alpestris_haplotype_hapA_NADH_dehydrogenase_subunit_2_(ND2) ND2 AY951363 E3 Triturus_vulgaris_haplotype_E3_NADH_dehydrogenase_subunit_2_(ND2) ND2 AY951495 H4 Triturus_vulgaris_haplotype_H4_NADH_dehydrogenase_subunit_2_(ND2) ND2 AY951393 D3 Triturus_vulgaris_haplotype_D3_NADH_dehydrogenase_subunit_2_(ND2) ND2 AY951472 D7 Triturus_vulgaris_haplotype_D7_NADH_dehydrogenase_subunit_2_(ND2) ND2 AY951494 C2 Triturus_vulgaris_haplotype_C2_NADH_dehydrogenase_subunit_2_(ND2) ND2 AY951340 B4 Triturus_vulgaris_haplotype_B4_NADH_dehydrogenase_subunit_2_(ND2) ND2+ND4 AY951447 F27 Triturus montandoni haplotype F27 NADH dehydrogenase subunit 2 (ND2) ND2+ND4 AY951339 B2 Triturus vulgaris haplotype B2 NADH dehydrogenase subunit 2 (ND2) ND2+ND4 AY951393 D3 Triturus vulgaris haplotype D3 NADH dehydrogenase subunit 2 (ND2) ND2+ND4 AY951443 G14 Triturus vulgaris haplotype G14 NADH dehydrogenase subunit 2 (ND2) ND2+ND4 AY951468 J19 Triturus vulgaris haplotype J19 NADH dehydrogenase subunit 2 (ND2) ND2+ND4 AY951448 I5 Triturus vulgaris haplotype I5 NADH dehydrogenase subunit 2 (ND2) 4 ND2+ND4 AY951520 A1 Triturus_vulgaris_haplotype_A1_NADH_dehydrogenase_subunit_4_(ND4) ND2+ND4 AY951568 A4 Triturus_vulgaris_haplotype_A4_NADH_dehydrogenase_subunit_4_(ND4) ND2+ND4 AY951510 B1 Triturus_vulgaris_haplotype_B1_NADH_dehydrogenase_subunit_4_(ND4) ND2+ND4 AY951638 C1 Triturus_vulgaris_haplotype_C1_NADH_dehydrogenase_subunit_4_(ND4) ND2+ND4 AY951646 D1 Triturus_vulgaris_haplotype_D1_NADH_dehydrogenase_subunit_4_(ND4) ND2+ND4 AY951566 E1 Triturus_vulgaris_haplotype_E1_NADH_dehydrogenase_subunit_4_(ND4) ND2+ND4 AY951557 F1 Triturus_vulgaris_haplotype_F1_NADH_dehydrogenase_subunit_4_(ND4) ND2+ND4 AY951518 G1 Triturus_montandoni_haplotype_G1_NADH_dehydrogenase_subunit_4_(ND4) ND2+ND4 AY951609 H1 Triturus_vulgaris_haplotype_H1_NADH_dehydrogenase_subunit_4_(ND4) ND2+ND4 AY951637 I1 Triturus_montandoni_haplotype_I1_NADH_dehydrogenase_subunit_4_(ND4) ND2+ND4 AY951645 J1 Triturus_vulgaris_haplotype_J1_NADH_dehydrogenase_subunit_4_(ND4) ND2+ND4 AY951511 K1 Triturus_vulgaris_haplotype_K1_NADH_dehydrogenase_subunit_4_(ND4) ND2+ND4 AY951621 L1 Triturus_vulgaris_haplotype_L1_NADH_dehydrogenase_subunit_4_(ND4) ND2+ND4 AY951515 L24 Triturus_vulgaris_haplotype_L24_NADH_dehydrogenase_subunit_4_(ND4) ND2+ND4 AY951562 L57 Triturus_vulgaris_haplotype_L57_NADH_dehydrogenase_subunit_4_(ND4) ND2+ND4 AY951653 L. italicus Triturus_italicus_NADH_dehydrogenase_subunit_4_(ND4) ND2+ND4 AY951651 L.boscai Tb2 Triturus_boscai_haplotype_Tb2_NADH_dehydrogenase_subunit_4_(ND4) ND2+ND4 AY951652 L.boscai Tb3 Triturus_boscai_haplotype_Tb3_NADH_dehydrogenase_subunit_4_(ND4) ND2+ND4 AY951650 L.boscai Tb1 Triturus_boscai_haplotype_Tb1_NADH_dehydrogenase_subunit_4_(ND4) ND2+ND4 AY951648 L.helveticus Th1 Triturus_helveticus_haplotype_Th1_NADH_dehydrogenase_subunit_4_(ND4) ND2+ND4 DQ282134 M. alpestris hap1 Triturus_alpestris_haplotype_hap1_NADH_dehydrogenase_subunit_4_(ND4) ND2+ND4 DQ282133 M. alpestris hapA Triturus_alpestris_haplotype_hapA_NADH_dehydrogenase_subunit_4_(ND4) ND2+ND4 AY951605 F27 Triturus montandoni haplotype F27 NADH dehydrogenase subunit 2 (ND4) ND2+ND4 AY951509 B2 Triturus vulgaris haplotype B2 NADH dehydrogenase subunit 4 (ND4) ND2+ND4 AY951559 D3 Triturus vulgaris haplotype D3 NADH dehydrogenase subunit 4 (ND4) ND2+ND4 AY951600 G14 Triturus vulgaris haplotype G14 NADH dehydrogenase subunit 4 (ND4) ND2+ND4 AY951617 J19 Triturus vulgaris haplotype J19 NADH dehydrogenase subunit 4 (ND4) ND2+ND4 AY951606 I5 Triturus vulgaris haplotype I5 NADH dehydrogenase subunit 4 (ND4) 5 Figure S1 A maximum likelihood tree showing the relationships among mitochondrial ND2 sequences in Lissotriton vulgaris and outgroups. Bootstrap support > 70 is shown at nodes; * denotes support ≥ 90–95; ** denotes support > 95. Red tip labels mark haplotypes from Babik et al. (2005). Note that sublineages L24 and L57 represent lineages L2 and L3 (Babik et al., 2005), respectively. Green tip labels denote collection numbers and population names for newts sequenced in this study. 6 7 REFERENCES Arèvalo, E., Davis, S.K. & Sites, J.W. (1994) Mitochondrial DNA sequence divergence and phylogenetic relationships among eight chromosome races of the Sceloporus grammicus complex (Phrynosomatidae) in central Mexico. Systematic Biology, 43, 387-418. Babik, W., Branicki, W., Crnobrnja‐Isailović, J., Cogălniceanu, D., Sas, I., Olgun, K., Poyarkov, N.A., Garcia-París, M. & Arntzen, J.W. (2005) Phylogeography of two European newt species—discordance between mtDNA and morphology. Molecular Ecology, 14, 2475–2491. Pabijan, M. & Babik, W. (2006) Genetic structure in northeastern populations of the Alpine newt (Triturus alpestris): evidence for post‐Pleistocene differentiation. Molecular Ecology, 15, 2397-2407.