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Table 3 Parameter estimates for the geographical clines shown in Fig. 4. The results for Structure and NewHybrids on the panel of microsatellites are taken as the reference. Significant differences with the 2log-likelihood unit support limits falling outside the range observed for the reference clines are shown in boldface type

From: Concordant morphological and molecular clines in a contact zone of the Common and Spined toad (Bufo bufo and B. spinosus) in the northwest of France

  Model
Character, unit Type Centre Width δ L δ R τ L τ R p min p max
Microsatellite reference clines
 Structure, Q fixN −1.0 (−1.0–0.7) 30.3 (21.5–44.4)      0.016 0.983
 NewHybrids, posterior probability
   - B. spinosus side of transect fixL −1.0 (−1.0–−0.2) 0.6 (0.0–1.3) 0.000   0.007   0.000 0.990
   - B. bufo side of transect typR 10.8 (8.4–20.0) 12.2 (6.0–29.9)   1.729   0.048 0 1
 Thresholds–min, max   −1.0, 20.0 0.0, 44.4       
Tested clines
 PCA on microsatellites, loading first axis fixN 4.6 (−1.0−15.7) 104.9 (64.4–179.7)      −1.301 1.156
 mtDNA, haplotype frequency typN −1.0 (−1.0–2.4) 43.5 (31.0–64.0)      0 1
 Parotoids, classification probability fixN 65.5 (27.3–122.8) 255.1 (107.7–> 400)      0.142 0.769
 Metatarsal tubercle, idem fixN 96.6 (54.2–145.3) 298.7 (164.4–> 400)      0.060 0.865
 BDNF, allele frequency fixR 3.8 (−0.9–18.6) 58.9 (46.9–115.8)   0.505   0.274 0.023 1.000
 POMC, idem optN 22.3 (9.2–41.5) 90.7 (52.6–176.7)      0.187 0.951
 RAG1, idem typB 4.0 (−0.7–9.1) 35.7 (23.4–56.2) 2.811 20.704 0.360 0.042 0 1
 RPL3, idem fixR −0.9 (−1.0–3.9) 26.8 (23.0–49.1)   1.064   0.507 0.050 1.000
  1. For the chosen models p min and p max are fixed to 0 and 1 (typ models), or their empirical values (fix models), or p min and p max are fitted (opt model). Tail fitting encompassed right (R), left (L), none (N) or both fitted (B). Cline position is the centre of the contact zone and ca. equals the distance to Beaulieu (in km, population 10, see Table 1). Cline width (w) is calculated as 1/maximum slope. Two log-likelihood unit support limits are presented in parentheses. δ and τ are the shape parameters for the left and right tails, and p min and p max are the character states at either end of the transect